{"license":"https://creativecommons.org/licenses/by/4.0/","dataset":"atlas","updatedThrough":"2026-08-15","guardrail":"The atlas exposes only relationships declared in the current public data. A link or issue grouping does not make unlike measures comparable, establish ownership or control, define an antitrust market, assign liability, or show that a policy event caused an economic outcome.","filters":{"depth":2,"edgeType":"all","edgeTypeMatched":true,"focus":"topic:digital-platforms","focusMatched":true,"kind":"all","kindMatched":true,"layer":"all","layerMatched":true,"query":"","view":"network"},"summary":{"nodeCount":5478,"edgeCount":19193,"sourceCount":45,"profileCount":5433,"nodeKindCount":13,"layerCount":4,"eligibleEdgeCount":19193,"matchedNodeCount":31,"plottedEdgeCount":101,"plottedNodeCount":31,"hiddenNodeCount":0,"directNeighborCount":15},"focusNode":{"id":"topic:digital-platforms","kind":"topic","label":"Digital Platforms","shortLabel":"Digital Platforms","description":"How do defaults, distribution, data access, interoperability, and adjacent-platform positions shape entry across separately measured digital systems?","href":"/research/topics/digital-platforms","metricLabel":"Publication memberships","metricValue":"2","detail":"AR-T02 / 1 issue program / 5 evidence lanes","status":"institutional research topic","year":2026,"color":"#ea580c","searchText":"ar-t02 digital platforms digital how do defaults, distribution, data access, interoperability, and adjacent-platform positions shape entry across separately measured digital systems? trace usage and referral screens into exact product, operator, official-record, and research links while keeping every digital denominator separate. search, browser, mobile operating system, social referral, and ai-assistant usage are separate screens. their adjacency does not establish one ecosystem market, common control, or a combined concentration measure. stable user and firm panels, default and distribution contracts, switching, multihoming, interoperability, data access, compute, price, quality, and entry records. technology-policy researchers, reporters, authorities, and advocates ar-rb-2026-02 five digital gateways ar-ci-2026-02 four digital usage systems traced four different structural paths.","connectionCount":15},"nodes":[{"id":"topic:digital-platforms","kind":"topic","label":"Digital Platforms","shortLabel":"Digital Platforms","description":"How do defaults, distribution, data access, interoperability, and adjacent-platform positions shape entry across separately measured digital systems?","href":"/research/topics/digital-platforms","metricLabel":"Publication memberships","metricValue":"2","detail":"AR-T02 / 1 issue program / 5 evidence lanes","status":"institutional research topic","year":2026,"color":"#ea580c","searchText":"ar-t02 digital platforms digital how do defaults, distribution, data access, interoperability, and adjacent-platform positions shape entry across separately measured digital systems? trace usage and referral screens into exact product, operator, official-record, and research links while keeping every digital denominator separate. search, browser, mobile operating system, social referral, and ai-assistant usage are separate screens. their adjacency does not establish one ecosystem market, common control, or a combined concentration measure. stable user and firm panels, default and distribution contracts, switching, multihoming, interoperability, data access, compute, price, quality, and entry records. technology-policy researchers, reporters, authorities, and advocates ar-rb-2026-02 five digital gateways ar-ci-2026-02 four digital usage systems traced four different structural paths.","connectionCount":15,"distance":0,"labelVisible":true,"radius":20,"x":450,"y":260},{"id":"issue:digital-gateways","kind":"issue","label":"Digital platform gateways","shortLabel":"Digital gateways","description":"How do defaults, distribution agreements, data access, and adjacent-platform positions shape entry across separately measured digital systems?","href":"/issues/digital-platform-gateways","metricLabel":"Bounded markets","metricValue":"5","detail":"5 separately defined markets / editorial research program","status":"issue program","year":2026,"color":"#c026d3","searchText":"digital platform gateways digital gateways defaults, distribution, and adjacent platforms search, browsers, mobile operating systems, social referrals, and generative ai assistants are tracked as separate usage-share proxies while the issue program follows their declared product, operator, and official-record links. how do defaults, distribution agreements, data access, and adjacent-platform positions shape entry across separately measured digital systems? which distribution agreements and default placements affect switching at each gateway? where do data, compute, interoperability, or access conditions constrain entry without assuming the same mechanism across products? which firm-level and user-level records can separate usage movement from changes in product quality, availability, or measurement? u.s. search engine usage search engines digital platforms u.s. browser usage browsers software u.s. generative ai assistant usage ai assistants digital platforms u.s. mobile operating-system web usage mobile operating systems digital platforms u.s. social-media referral traffic social referrals digital platforms","connectionCount":8,"x":450,"y":142,"distance":1,"radius":11,"labelVisible":true},{"id":"question:market-hhi:us-browser-usage","kind":"question","label":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","shortLabel":"Browsers: Herfindahl-Hirs...","description":"Browsers moved from 3,720 in 2025 to 3,612 in 2026 (-108.0 HHI points). The latest encoded HHI anchor is lower within this documented market series. The change alone does not identify a cause or establish competitive harm.","href":"/research/agenda/market-hhi--us-browser-usage","metricLabel":"Herfindahl-Hirschman Index","metricValue":"3,612","detail":"Q32 / Mechanism / 2026","status":"decreased / estimated public","year":2026,"color":"#65a30d","searchText":"market-hhi:us-browser-usage which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary? browsers market-hhi herfindahl-hirschman index market mechanism test entry, exit, switching, price, quality, capacity, and share pathways inside the declared market boundary. browsers moved from 3,720 in 2025 to 3,612 in 2026 (-108.0 hhi points). the latest encoded hhi anchor is lower within this documented market series. the change alone does not identify a cause or establish competitive harm. entry and exit chronology for the same product and geographic boundary. participant shares at both observed anchors, including acquisitions and denominator changes. switching, price, quality, output, and capacity records covering the comparison window. method documentation confirming the market boundary and measurement basis across both anchors.","connectionCount":3,"x":501.198,"y":153.686,"distance":1,"radius":11,"labelVisible":true},{"id":"question:market-hhi:us-mobile-operating-system-usage","kind":"question","label":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","shortLabel":"Mobile operating systems:...","description":"Mobile operating systems moved from 5,094 in 2025 to 5,337 in 2026 (+243.0 HHI points). The latest encoded HHI anchor is higher within this documented market series. The change alone does not identify a cause or establish competitive harm.","href":"/research/agenda/market-hhi--us-mobile-operating-system-usage","metricLabel":"Herfindahl-Hirschman Index","metricValue":"5,337","detail":"Q36 / Mechanism / 2026","status":"increased / estimated public","year":2026,"color":"#65a30d","searchText":"market-hhi:us-mobile-operating-system-usage which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary? mobile operating systems market-hhi herfindahl-hirschman index market mechanism test entry, exit, switching, price, quality, capacity, and share pathways inside the declared market boundary. mobile operating systems moved from 5,094 in 2025 to 5,337 in 2026 (+243.0 hhi points). the latest encoded hhi anchor is higher within this documented market series. the change alone does not identify a cause or establish competitive harm. entry and exit chronology for the same product and geographic boundary. participant shares at both observed anchors, including acquisitions and denominator changes. switching, price, quality, output, and capacity records covering the comparison window. method documentation confirming the market boundary and measurement basis across both anchors.","connectionCount":3,"x":542.256,"y":186.428,"distance":1,"radius":11,"labelVisible":true},{"id":"question:market-hhi:us-search-engine-usage","kind":"question","label":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","shortLabel":"Search engines: Herfindah...","description":"Search engines moved from 7,589 in 2025 to 7,359 in 2026 (-230.0 HHI points). The latest encoded HHI anchor is lower within this documented market series. The change alone does not identify a cause or establish competitive harm.","href":"/research/agenda/market-hhi--us-search-engine-usage","metricLabel":"Herfindahl-Hirschman Index","metricValue":"7,359","detail":"Q39 / Mechanism / 2026","status":"decreased / estimated public","year":2026,"color":"#65a30d","searchText":"market-hhi:us-search-engine-usage which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary? search engines market-hhi herfindahl-hirschman index market mechanism test entry, exit, switching, price, quality, capacity, and share pathways inside the declared market boundary. search engines moved from 7,589 in 2025 to 7,359 in 2026 (-230.0 hhi points). the latest encoded hhi anchor is lower within this documented market series. the change alone does not identify a cause or establish competitive harm. entry and exit chronology for the same product and geographic boundary. participant shares at both observed anchors, including acquisitions and denominator changes. switching, price, quality, output, and capacity records covering the comparison window. method documentation confirming the market boundary and measurement basis across both anchors.","connectionCount":3,"x":565.041,"y":233.743,"distance":1,"radius":11,"labelVisible":true},{"id":"question:market-hhi:us-social-media-referral-traffic","kind":"question","label":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","shortLabel":"Social referrals: Herfind...","description":"Social referrals moved from 3,804 in 2025 to 4,995 in 2026 (+1,191.0 HHI points). The latest encoded HHI anchor is higher within this documented market series. The change alone does not identify a cause or establish competitive harm.","href":"/research/agenda/market-hhi--us-social-media-referral-traffic","metricLabel":"Herfindahl-Hirschman Index","metricValue":"4,995","detail":"Q42 / Mechanism / 2026","status":"increased / estimated public","year":2026,"color":"#65a30d","searchText":"market-hhi:us-social-media-referral-traffic which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary? social referrals market-hhi herfindahl-hirschman index market mechanism test entry, exit, switching, price, quality, capacity, and share pathways inside the declared market boundary. social referrals moved from 3,804 in 2025 to 4,995 in 2026 (+1,191.0 hhi points). the latest encoded hhi anchor is higher within this documented market series. the change alone does not identify a cause or establish competitive harm. entry and exit chronology for the same product and geographic boundary. participant shares at both observed anchors, including acquisitions and denominator changes. switching, price, quality, output, and capacity records covering the comparison window. method documentation confirming the market boundary and measurement basis across both anchors.","connectionCount":3,"x":565.041,"y":286.257,"distance":1,"radius":11,"labelVisible":true},{"id":"question:market-cr4:us-browser-usage","kind":"question","label":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","shortLabel":"Browsers: Four-participan...","description":"Browsers moved from 93.6% in 2025 to 93.8% in 2026 (+0.15 percentage points). The latest encoded CR4 anchor is higher within this documented market series. The change alone does not identify a cause or establish competitive harm.","href":"/research/agenda/market-cr4--us-browser-usage","metricLabel":"Four-participant concentration ratio","metricValue":"93.8%","detail":"Q31 / Shares / 2026","status":"increased / estimated public","year":2026,"color":"#65a30d","searchText":"market-cr4:us-browser-usage which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors? browsers market-cr4 four-participant concentration ratio share accounting reconstruct participant-share movement while checking denominator, coverage, entry, exit, and transaction changes. browsers moved from 93.6% in 2025 to 93.8% in 2026 (+0.15 percentage points). the latest encoded cr4 anchor is higher within this documented market series. the change alone does not identify a cause or establish competitive harm. firm- or product-level shares at both anchors using the same denominator. share changes attributable to entry, exit, acquisition, divestiture, or organic movement. coverage, missing-participant, and residual-category documentation for each anchor. source methodology showing whether measurement and participant classification stayed stable.","connectionCount":3,"x":542.256,"y":333.572,"distance":1,"radius":11,"labelVisible":true},{"id":"question:market-cr4:us-mobile-operating-system-usage","kind":"question","label":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","shortLabel":"Mobile operating systems:...","description":"Mobile operating systems moved from 100.0% in 2025 to 100.0% in 2026 (+0.04 percentage points). The latest encoded CR4 anchor is higher within this documented market series. The change alone does not identify a cause or establish competitive harm.","href":"/research/agenda/market-cr4--us-mobile-operating-system-usage","metricLabel":"Four-participant concentration ratio","metricValue":"100.0%","detail":"Q35 / Shares / 2026","status":"increased / estimated public","year":2026,"color":"#65a30d","searchText":"market-cr4:us-mobile-operating-system-usage which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors? mobile operating systems market-cr4 four-participant concentration ratio share accounting reconstruct participant-share movement while checking denominator, coverage, entry, exit, and transaction changes. mobile operating systems moved from 100.0% in 2025 to 100.0% in 2026 (+0.04 percentage points). the latest encoded cr4 anchor is higher within this documented market series. the change alone does not identify a cause or establish competitive harm. firm- or product-level shares at both anchors using the same denominator. share changes attributable to entry, exit, acquisition, divestiture, or organic movement. coverage, missing-participant, and residual-category documentation for each anchor. source methodology showing whether measurement and participant classification stayed stable.","connectionCount":3,"x":501.198,"y":366.314,"distance":1,"radius":11,"labelVisible":true},{"id":"question:market-cr4:us-search-engine-usage","kind":"question","label":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","shortLabel":"Search engines: Four-part...","description":"Search engines moved from 99.4% in 2025 to 99.4% in 2026 (-0.02 percentage points). The latest encoded CR4 anchor is lower within this documented market series. The change alone does not identify a cause or establish competitive harm.","href":"/research/agenda/market-cr4--us-search-engine-usage","metricLabel":"Four-participant concentration ratio","metricValue":"99.4%","detail":"Q38 / Shares / 2026","status":"decreased / estimated public","year":2026,"color":"#65a30d","searchText":"market-cr4:us-search-engine-usage which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors? search engines market-cr4 four-participant concentration ratio share accounting reconstruct participant-share movement while checking denominator, coverage, entry, exit, and transaction changes. search engines moved from 99.4% in 2025 to 99.4% in 2026 (-0.02 percentage points). the latest encoded cr4 anchor is lower within this documented market series. the change alone does not identify a cause or establish competitive harm. firm- or product-level shares at both anchors using the same denominator. share changes attributable to entry, exit, acquisition, divestiture, or organic movement. coverage, missing-participant, and residual-category documentation for each anchor. source methodology showing whether measurement and participant classification stayed stable.","connectionCount":3,"x":450,"y":378,"distance":1,"radius":11,"labelVisible":true},{"id":"question:market-cr4:us-social-media-referral-traffic","kind":"question","label":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","shortLabel":"Social referrals: Four-pa...","description":"Social referrals moved from 95.1% in 2025 to 94.4% in 2026 (-0.71 percentage points). The latest encoded CR4 anchor is lower within this documented market series. The change alone does not identify a cause or establish competitive harm.","href":"/research/agenda/market-cr4--us-social-media-referral-traffic","metricLabel":"Four-participant concentration ratio","metricValue":"94.4%","detail":"Q41 / Shares / 2026","status":"decreased / estimated public","year":2026,"color":"#65a30d","searchText":"market-cr4:us-social-media-referral-traffic which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors? social referrals market-cr4 four-participant concentration ratio share accounting reconstruct participant-share movement while checking denominator, coverage, entry, exit, and transaction changes. social referrals moved from 95.1% in 2025 to 94.4% in 2026 (-0.71 percentage points). the latest encoded cr4 anchor is lower within this documented market series. the change alone does not identify a cause or establish competitive harm. firm- or product-level shares at both anchors using the same denominator. share changes attributable to entry, exit, acquisition, divestiture, or organic movement. coverage, missing-participant, and residual-category documentation for each anchor. source methodology showing whether measurement and participant classification stayed stable.","connectionCount":3,"x":398.802,"y":366.314,"distance":1,"radius":11,"labelVisible":true},{"id":"question:market-leader-share:us-browser-usage","kind":"question","label":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","shortLabel":"Browsers: Leading-partici...","description":"Browsers moved from 52.3% in 2025 to 50.0% in 2026 (-2.29 percentage points). The latest encoded Leader share anchor is lower within this documented market series. The change alone does not identify a cause or establish competitive harm.","href":"/research/agenda/market-leader-share--us-browser-usage","metricLabel":"Leading-participant share","metricValue":"50.0%","detail":"Q33 / Shares / 2026","status":"decreased / estimated public","year":2026,"color":"#65a30d","searchText":"market-leader-share:us-browser-usage which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors? browsers market-leader-share leading-participant share share accounting reconstruct participant-share movement while checking denominator, coverage, entry, exit, and transaction changes. browsers moved from 52.3% in 2025 to 50.0% in 2026 (-2.29 percentage points). the latest encoded leader share anchor is lower within this documented market series. the change alone does not identify a cause or establish competitive harm. firm- or product-level shares at both anchors using the same denominator. share changes attributable to entry, exit, acquisition, divestiture, or organic movement. coverage, missing-participant, and residual-category documentation for each anchor. source methodology showing whether measurement and participant classification stayed stable.","connectionCount":3,"x":357.744,"y":333.572,"distance":1,"radius":11,"labelVisible":true},{"id":"question:market-leader-share:us-mobile-operating-system-usage","kind":"question","label":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","shortLabel":"Mobile operating systems:...","description":"Mobile operating systems moved from 57.6% in 2025 to 63.1% in 2026 (+5.48 percentage points). The latest encoded Leader share anchor is higher within this documented market series. The change alone does not identify a cause or establish competitive harm.","href":"/research/agenda/market-leader-share--us-mobile-operating-system-usage","metricLabel":"Leading-participant share","metricValue":"63.1%","detail":"Q37 / Shares / 2026","status":"increased / estimated public","year":2026,"color":"#65a30d","searchText":"market-leader-share:us-mobile-operating-system-usage which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors? mobile operating systems market-leader-share leading-participant share share accounting reconstruct participant-share movement while checking denominator, coverage, entry, exit, and transaction changes. mobile operating systems moved from 57.6% in 2025 to 63.1% in 2026 (+5.48 percentage points). the latest encoded leader share anchor is higher within this documented market series. the change alone does not identify a cause or establish competitive harm. firm- or product-level shares at both anchors using the same denominator. share changes attributable to entry, exit, acquisition, divestiture, or organic movement. coverage, missing-participant, and residual-category documentation for each anchor. source methodology showing whether measurement and participant classification stayed stable.","connectionCount":3,"x":334.959,"y":286.257,"distance":1,"radius":11,"labelVisible":false},{"id":"question:market-leader-share:us-search-engine-usage","kind":"question","label":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","shortLabel":"Search engines: Leading-p...","description":"Search engines moved from 86.7% in 2025 to 85.2% in 2026 (-1.55 percentage points). The latest encoded Leader share anchor is lower within this documented market series. The change alone does not identify a cause or establish competitive harm.","href":"/research/agenda/market-leader-share--us-search-engine-usage","metricLabel":"Leading-participant share","metricValue":"85.2%","detail":"Q40 / Shares / 2026","status":"decreased / estimated public","year":2026,"color":"#65a30d","searchText":"market-leader-share:us-search-engine-usage which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors? search engines market-leader-share leading-participant share share accounting reconstruct participant-share movement while checking denominator, coverage, entry, exit, and transaction changes. search engines moved from 86.7% in 2025 to 85.2% in 2026 (-1.55 percentage points). the latest encoded leader share anchor is lower within this documented market series. the change alone does not identify a cause or establish competitive harm. firm- or product-level shares at both anchors using the same denominator. share changes attributable to entry, exit, acquisition, divestiture, or organic movement. coverage, missing-participant, and residual-category documentation for each anchor. source methodology showing whether measurement and participant classification stayed stable.","connectionCount":3,"x":334.959,"y":233.743,"distance":1,"radius":11,"labelVisible":false},{"id":"question:market-leader-share:us-social-media-referral-traffic","kind":"question","label":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","shortLabel":"Social referrals: Leading...","description":"Social referrals moved from 57.5% in 2025 to 68.9% in 2026 (+11.49 percentage points). The latest encoded Leader share anchor is higher within this documented market series. The change alone does not identify a cause or establish competitive harm.","href":"/research/agenda/market-leader-share--us-social-media-referral-traffic","metricLabel":"Leading-participant share","metricValue":"68.9%","detail":"Q43 / Shares / 2026","status":"increased / estimated public","year":2026,"color":"#65a30d","searchText":"market-leader-share:us-social-media-referral-traffic which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors? social referrals market-leader-share leading-participant share share accounting reconstruct participant-share movement while checking denominator, coverage, entry, exit, and transaction changes. social referrals moved from 57.5% in 2025 to 68.9% in 2026 (+11.49 percentage points). the latest encoded leader share anchor is higher within this documented market series. the change alone does not identify a cause or establish competitive harm. firm- or product-level shares at both anchors using the same denominator. share changes attributable to entry, exit, acquisition, divestiture, or organic movement. coverage, missing-participant, and residual-category documentation for each anchor. source methodology showing whether measurement and participant classification stayed stable.","connectionCount":3,"x":357.744,"y":186.428,"distance":1,"radius":11,"labelVisible":false},{"id":"report:rep-digital-gateways","kind":"report","label":"Five Digital Gateways","shortLabel":"Five Digital Gateways","description":"A source-backed research brief tracing search, browser, mobile operating-system, social-referral, and AI-assistant concentration without collapsing them into one platform market or ecosystem score.","href":"/reports/digital-gateways-brief","metricLabel":"Evidence sources","metricValue":"5","detail":"5 linked markets","status":"published","year":2026,"color":"#6366f1","searchText":"five digital gateways u.s. platform concentration across five separately bounded usage systems a source-backed research brief tracing search, browser, mobile operating-system, social-referral, and ai-assistant concentration without collapsing them into one platform market or ecosystem score. five system histories, exact share rows, official product-attribution paths, and a public research agenda with every denominator kept separate. five statcounter u.s. public usage-share sources: april 2023-april 2026 search, browser, mobile operating-system, and social-referral anchors, plus the may 2026 ai-assistant baseline. official product-attribution records remain a separate evidence layer.","connectionCount":12,"x":398.802,"y":153.686,"distance":1,"radius":11,"labelVisible":false},{"id":"report:insight-digital-gateways-change","kind":"report","label":"Four digital usage systems traced four different structural paths.","shortLabel":"Digital gateways","description":"Browser, mobile operating-system, search-engine, and social-referral shares are read side by side without turning them into one platform-power score. Usage and referral shares are proxies inside separately defined systems. The dispatch does not add shares across products, resolve legal market definition, or infer a common competitive cause.","href":"/insights/digital-gateways-change","metricLabel":"Exact signals","metricValue":"12","detail":"AR-CI-2026-02 / Focused note","status":"current insight","year":2026,"color":"#6366f1","searchText":"four digital usage systems traced four different structural paths. digital gateways browser, mobile operating-system, search-engine, and social-referral shares are read side by side without turning them into one platform-power score. defined markets focused note ar-ci-2026-02 social-referral composition shifted toward the leader. social referrals moved from 3,804 in 2025 to 4,995 in 2026 (+1,191.0 hhi points). social referrals moved from 57.5% in 2025 to 68.9% in 2026 (+11.49 percentage points). social referrals moved from 95.1% in 2025 to 94.4% in 2026 (-0.71 percentage points). search hhi and leading share both moved lower. search engines moved from 7,589 in 2025 to 7,359 in 2026 (-230.0 hhi points). search engines moved from 86.7% in 2025 to 85.2% in 2026 (-1.55 percentage points). search engines moved from 99.4% in 2025 to 99.4% in 2026 (-0.02 percentage points). mobile operating-system hhi and leading share moved higher. mobile operating systems moved from 5,094 in 2025 to 5,337 in 2026 (+243.0 hhi points). mobile operating systems moved from 57.6% in 2025 to 63.1% in 2026 (+5.48 percentage points). mobile operating systems moved from 100.0% in 2025 to 100.0% in 2026 (+0.04 percentage points). browser hhi and leading share moved lower while cr4 edged higher. browsers moved from 3,720 in 2025 to 3,612 in 2026 (-108.0 hhi points). browsers moved from 52.3% in 2025 to 50.0% in 2026 (-2.29 percentage points). browsers moved from 93.6% in 2025 to 93.8% in 2026 (+0.15 percentage points). browsers four-participant concentration ratio browsers herfindahl-hirschman index browsers leading-participant share mobile operating systems four-participant concentration ratio mobile operating systems herfindahl-hirschman index mobile operating systems leading-participant share search engines four-participant concentration ratio search engines herfindahl-hirschman index search engines leading-participant share social referrals four-participant concentration ratio social referrals herfindahl-hirschman index social referrals leading-participant share u.s. browser usage u.s. mobile operating-system web usage u.s. search engine usage u.s. social-media referral traffic","connectionCount":10,"x":450,"y":84,"distance":1,"radius":11,"labelVisible":false},{"id":"market:mkt-browser","kind":"market","label":"U.S. browser usage","shortLabel":"Browsers","description":"All-platform U.S. browser usage share from StatCounter Global Stats for April 2026. The profile tracks browser usage concentration, not browser advertising or operating-system tying questions.","href":"/markets/us-browser-usage","metricLabel":"Latest HHI","metricValue":"3,612","detail":"United States / 2026","status":"estimated_public","year":2026,"color":"#14b8a6","searchText":"u.s. browser usage browsers software united states all-platform u.s. browser usage share from statcounter global stats for april 2026. the profile tracks browser usage concentration, not browser advertising or operating-system tying questions.","connectionCount":21,"x":471.391,"y":22.963,"distance":2,"radius":8,"labelVisible":false},{"id":"market:mkt-search","kind":"market","label":"U.S. search engine usage","shortLabel":"Search engines","description":"All-platform U.S. search engine usage share from StatCounter Global Stats for April 2026. The market is an observed usage-share proxy, not search advertising revenue.","href":"/markets/us-search-engine-usage","metricLabel":"Latest HHI","metricValue":"7,359","detail":"United States / 2026","status":"estimated_public","year":2026,"color":"#14b8a6","searchText":"u.s. search engine usage search engines digital platforms united states all-platform u.s. search engine usage share from statcounter global stats for april 2026. the market is an observed usage-share proxy, not search advertising revenue.","connectionCount":21,"x":565.953,"y":52.157,"distance":2,"radius":8,"labelVisible":false},{"id":"market:mkt-social-referral","kind":"market","label":"U.S. social-media referral traffic","shortLabel":"Social referrals","description":"Social-platform concentration based on U.S. page views referred from social-media sites to StatCounter-tracked websites in April 2023-April 2026. The series measures outbound referral traffic, not platform users, time spent, advertising revenue, engagement, or an antitrust market.","href":"/markets/us-social-media-referral-traffic","metricLabel":"Latest HHI","metricValue":"4,995","detail":"United States / 2026","status":"estimated_public","year":2026,"color":"#14b8a6","searchText":"u.s. social-media referral traffic social referrals digital platforms united states social-platform concentration based on u.s. page views referred from social-media sites to statcounter-tracked websites in april 2023-april 2026. the series measures outbound referral traffic, not platform users, time spent, advertising revenue, engagement, or an antitrust market.","connectionCount":21,"x":640.466,"y":117.288,"distance":2,"radius":8,"labelVisible":false},{"id":"market:mkt-mobile-os","kind":"market","label":"U.S. mobile operating-system web usage","shortLabel":"Mobile operating systems","description":"Mobile operating-system concentration based on the operating systems detected in U.S. mobile page views measured by StatCounter in April 2023-April 2026. The series is a public web-usage proxy rather than device sales, installed base, app-store activity, or operating-system revenue.","href":"/markets/us-mobile-operating-system-usage","metricLabel":"Latest HHI","metricValue":"5,337","detail":"United States / 2026","status":"estimated_public","year":2026,"color":"#14b8a6","searchText":"u.s. mobile operating-system web usage mobile operating systems digital platforms united states mobile operating-system concentration based on the operating systems detected in u.s. mobile page views measured by statcounter in april 2023-april 2026. the series is a public web-usage proxy rather than device sales, installed base, app-store activity, or operating-system revenue.","connectionCount":18,"x":682.046,"y":207.096,"distance":2,"radius":8,"labelVisible":false},{"id":"market:mkt-ai-chatbot","kind":"market","label":"U.S. generative AI assistant usage","shortLabel":"AI assistants","description":"Consumer generative AI assistant usage concentration from StatCounter Global Stats for May 2026. The market tracks which AI chatbots people use across StatCounter-tracked assistants, an observed usage-share proxy rather than revenue, total user counts, or the broader AI supply chain of chips and cloud.","href":"/markets/us-ai-assistant-usage","metricLabel":"Latest HHI","metricValue":"4,804","detail":"United States / 2026","status":"estimated_public","year":2026,"color":"#14b8a6","searchText":"u.s. generative ai assistant usage ai assistants digital platforms united states consumer generative ai assistant usage concentration from statcounter global stats for may 2026. the market tracks which ai chatbots people use across statcounter-tracked assistants, an observed usage-share proxy rather than revenue, total user counts, or the broader ai supply chain of chips and cloud.","connectionCount":16,"x":683.502,"y":306.051,"distance":2,"radius":8,"labelVisible":false},{"id":"topic:market-structure","kind":"topic","label":"Market Structure","shortLabel":"Market Structure","description":"Where is market power concentrated, how is structure changing, and which competitive mechanism still needs to be tested?","href":"/research/topics/market-structure","metricLabel":"Publication memberships","metricValue":"9","detail":"AR-T01 / 6 issue programs / 5 evidence lanes","status":"institutional research topic","year":2026,"color":"#ea580c","searchText":"ar-t01 market structure markets where is market power concentrated, how is structure changing, and which competitive mechanism still needs to be tested? connect definition-bound concentration measures, participant shares, historical movement, and public research questions without collapsing unlike markets into one score. a concentration measure is a screen inside its stated product, geography, denominator, and period. it is not by itself proof of market power, harm, causation, liability, or the correct legal market. comparable participant shares, entry and exit, switching, price, quality, capacity, transactions, and stable market-definition records. researchers, journalists, enforcement staff, and public officials ar-sc-2026-01 the u.s. competition landscape ar-mm-2026-01 how hhi helps explain market concentration ar-rb-2026-02 five digital gateways ar-rb-2026-01 beef meatpacking buyer power ar-rb-2026-03 state banking structure, 2015-2025 ar-rb-2026-06 fixed broadband concentration across geographic scales, 2020-2024 ar-rb-2026-07 state individual insurance concentration, 2024 ar-ci-2026-01 latest market-structure signals moved in both directions. ar-ci-2026-02 four digital usage systems traced four different structural paths.","connectionCount":30,"x":644.584,"y":397.044,"distance":2,"radius":8,"labelVisible":false},{"id":"topic:merger-review","kind":"topic","label":"Merger Review","shortLabel":"Merger Review","description":"How are notification volume, transaction mix, review intensity, official outcomes, and observed market structure changing without conflating process with effect?","href":"/research/topics/merger-review","metricLabel":"Publication memberships","metricValue":"3","detail":"AR-T06 / 2 issue programs / 5 evidence lanes","status":"institutional research topic","year":2026,"color":"#ea580c","searchText":"ar-t06 merger review mergers how are notification volume, transaction mix, review intensity, official outcomes, and observed market structure changing without conflating process with effect? keep federal filing, transaction-size, review-process, structural-screen, and official-record evidence in separate but connected lanes. notification counts, second request rates, concentration screens, complaints, settlements, and abandonments have different denominators and meanings. none alone establishes transaction effects or legal merit. transaction-level industry and size, thresholds, exemptions, agency allocation, review timing, outcomes, remedies, market shares, entry, price, quality, and capacity. merger researchers, oversight staff, journalists, and enforcement practitioners ar-sc-2026-01 the u.s. competition landscape ar-rb-2026-05 the federal merger review pipeline, 2016-2025 ar-ci-2026-07 reported hsr volume and the second request rate both moved lower in fy2025.","connectionCount":7,"x":572.021,"y":464.34,"distance":2,"radius":8,"labelVisible":false},{"id":"indicator:market-hhi","kind":"indicator","label":"Tracked market HHI","shortLabel":"Market HHI","description":"Source-reported or reproducibly calculated HHI anchors from documented market profiles.","href":"/indicators/market-hhi","metricLabel":"Observation rows","metricValue":"26","detail":"8 entities / 2017-2026","status":"markets","year":2026,"color":"#06b6d4","searchText":"market-hhi tracked market hhi market hhi source-reported or reproducibly calculated hhi anchors from documented market profiles. markets hhi (0-10,000)","connectionCount":23,"x":478.359,"y":496.304,"distance":2,"radius":8,"labelVisible":false},{"id":"indicator:market-cr4","kind":"indicator","label":"Tracked market CR4","shortLabel":"Market CR4","description":"Released four-participant concentration anchors from source-labeled shares or source-reported aggregate CR4.","href":"/indicators/market-cr4","metricLabel":"Observation rows","metricValue":"21","detail":"7 entities / 1980-2026","status":"markets","year":2026,"color":"#06b6d4","searchText":"market-cr4 tracked market cr4 market cr4 released four-participant concentration anchors from source-labeled shares or source-reported aggregate cr4. markets percent","connectionCount":19,"x":379.794,"y":487.409,"distance":2,"radius":8,"labelVisible":false},{"id":"indicator:market-leader-share","kind":"indicator","label":"Tracked leading-participant share","shortLabel":"Market leader share","description":"Largest sourced non-aggregate participant share in each released market anchor.","href":"/indicators/market-leader-share","metricLabel":"Observation rows","metricValue":"18","detail":"6 entities / 2023-2026","status":"markets","year":2026,"color":"#06b6d4","searchText":"market-leader-share tracked leading-participant share market leader share largest sourced non-aggregate participant share in each released market anchor. markets percent","connectionCount":16,"x":293.368,"y":439.193,"distance":2,"radius":8,"labelVisible":false},{"id":"source:statcounter-browser-us-2026","kind":"source","label":"Browser market share in United States of America, April 2023-April 2026","shortLabel":"StatCounter Global Stats","description":"Monthly public StatCounter all-platform browser share export for the United States.","href":"/sources/statcounter-browser-us-2026","metricLabel":"Access date","metricValue":"2026-07-17","detail":"StatCounter Global Stats","status":"public dataset","year":2026,"color":"#64748b","searchText":"statcounter-browser-us-2026 browser market share in united states of america, april 2023-april 2026 statcounter global stats monthly public statcounter all-platform browser share export for the united states. statcounter global stats, browser market share in united states of america, monthly csv export for april 2023-april 2026. public_dataset","connectionCount":9,"x":234.025,"y":359.993,"distance":2,"radius":8,"labelVisible":false},{"id":"source:statcounter-search-us-2026","kind":"source","label":"Search engine market share in United States of America, April 2023-April 2026","shortLabel":"StatCounter Global Stats","description":"Monthly public StatCounter all-platform search engine share export for the United States.","href":"/sources/statcounter-search-us-2026","metricLabel":"Access date","metricValue":"2026-07-17","detail":"StatCounter Global Stats","status":"public dataset","year":2026,"color":"#64748b","searchText":"statcounter-search-us-2026 search engine market share in united states of america, april 2023-april 2026 statcounter global stats monthly public statcounter all-platform search engine share export for the united states. statcounter global stats, search engine market share in united states of america, monthly csv export for april 2023-april 2026. public_dataset","connectionCount":9,"x":212.026,"y":263.503,"distance":2,"radius":8,"labelVisible":false},{"id":"source:statcounter-mobile-os-us-2026","kind":"source","label":"Mobile operating system market share in United States of America, April 2023-April 2026","shortLabel":"StatCounter Global Stats","description":"Monthly public StatCounter mobile operating-system page-view share export for the United States.","href":"/sources/statcounter-mobile-os-us-2026","metricLabel":"Access date","metricValue":"2026-07-20","detail":"StatCounter Global Stats","status":"public dataset","year":2026,"color":"#64748b","searchText":"statcounter-mobile-os-us-2026 mobile operating system market share in united states of america, april 2023-april 2026 statcounter global stats monthly public statcounter mobile operating-system page-view share export for the united states. statcounter global stats, mobile operating system market share in united states of america, monthly csv export for april 2023-april 2026. public_dataset","connectionCount":7,"x":231.175,"y":166.407,"distance":2,"radius":8,"labelVisible":false},{"id":"source:statcounter-social-referral-us-2026","kind":"source","label":"Social media referral share in United States of America, April 2023-April 2026","shortLabel":"StatCounter Global Stats","description":"Monthly public StatCounter all-platform social-media referral share export for the United States.","href":"/sources/statcounter-social-referral-us-2026","metricLabel":"Access date","metricValue":"2026-07-20","detail":"StatCounter Global Stats","status":"public dataset","year":2026,"color":"#64748b","searchText":"statcounter-social-referral-us-2026 social media referral share in united states of america, april 2023-april 2026 statcounter global stats monthly public statcounter all-platform social-media referral share export for the united states. statcounter global stats, social media stats in united states of america, monthly csv export for april 2023-april 2026. public_dataset","connectionCount":7,"x":288.161,"y":85.495,"distance":2,"radius":8,"labelVisible":false},{"id":"source:statcounter-ai-chatbot-us-2026","kind":"source","label":"AI chatbot market share in United States of America May 2026","shortLabel":"StatCounter Global Stats","description":"Public StatCounter AI chatbot usage share table for the United States.","href":"/sources/statcounter-ai-chatbot-us-2026","metricLabel":"Access date","metricValue":"2026-06-23","detail":"StatCounter Global Stats","status":"public dataset","year":2026,"color":"#64748b","searchText":"statcounter-ai-chatbot-us-2026 ai chatbot market share in united states of america may 2026 statcounter global stats public statcounter ai chatbot usage share table for the united states. statcounter global stats, ai chatbot market share in united states of america, may 2026. public_dataset","connectionCount":6,"x":373.13,"y":34.756,"distance":2,"radius":8,"labelVisible":false}],"rows":[{"id":"indicator-source:market-cr4:statcounter-ai-chatbot-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-cr4","fromKind":"indicator","fromLabel":"Tracked market CR4","fromHref":"/indicators/market-cr4","toId":"source:statcounter-ai-chatbot-us-2026","toKind":"source","toLabel":"AI chatbot market share in United States of America May 2026","toHref":"/sources/statcounter-ai-chatbot-us-2026","evidenceLabel":"StatCounter Global Stats / AI chatbot market share in United States of America May 2026","evidenceDetail":"CR4 is the sum of the four largest sourced non-aggregate participant shares in this released anchor.","sourceId":"statcounter-ai-chatbot-us-2026","sourceUrl":"https://gs.statcounter.com/ai-chatbot-market-share/all/united-states-of-america","confidenceLevel":"medium","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-cr4:statcounter-browser-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-cr4","fromKind":"indicator","fromLabel":"Tracked market CR4","fromHref":"/indicators/market-cr4","toId":"source:statcounter-browser-us-2026","toKind":"source","toLabel":"Browser market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-browser-us-2026","evidenceLabel":"StatCounter Global Stats / Browser market share in United States of America April 2023","evidenceDetail":"CR4 is the sum of the four largest sourced non-aggregate participant shares in this released anchor.","sourceId":"statcounter-browser-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=browser&region_hidden=US&granularity=monthly&statType=Browser&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"low","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-cr4:statcounter-mobile-os-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-cr4","fromKind":"indicator","fromLabel":"Tracked market CR4","fromHref":"/indicators/market-cr4","toId":"source:statcounter-mobile-os-us-2026","toKind":"source","toLabel":"Mobile operating system market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-mobile-os-us-2026","evidenceLabel":"StatCounter Global Stats / Mobile operating system market share in United States of America April 2023","evidenceDetail":"CR4 is the sum of the four largest sourced non-aggregate participant shares in this released anchor.","sourceId":"statcounter-mobile-os-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Mobile&device_hidden=mobile&statType_hidden=os&region_hidden=US&granularity=monthly&statType=Operating%20System&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"medium","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-cr4:statcounter-search-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-cr4","fromKind":"indicator","fromLabel":"Tracked market CR4","fromHref":"/indicators/market-cr4","toId":"source:statcounter-search-us-2026","toKind":"source","toLabel":"Search engine market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-search-us-2026","evidenceLabel":"StatCounter Global Stats / Search engine market share in United States of America April 2023","evidenceDetail":"CR4 is the sum of the four largest sourced non-aggregate participant shares in this released anchor.","sourceId":"statcounter-search-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=search_engine&region_hidden=US&granularity=monthly&statType=Search%20Engine&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"low","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-cr4:statcounter-social-referral-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-cr4","fromKind":"indicator","fromLabel":"Tracked market CR4","fromHref":"/indicators/market-cr4","toId":"source:statcounter-social-referral-us-2026","toKind":"source","toLabel":"Social media referral share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-social-referral-us-2026","evidenceLabel":"StatCounter Global Stats / Social media referral share in United States of America April 2023","evidenceDetail":"CR4 is the sum of the four largest sourced non-aggregate participant shares in this released anchor.","sourceId":"statcounter-social-referral-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=social_media&region_hidden=US&granularity=monthly&statType=Social%20Media&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"medium","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-hhi:statcounter-ai-chatbot-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-hhi","fromKind":"indicator","fromLabel":"Tracked market HHI","fromHref":"/indicators/market-hhi","toId":"source:statcounter-ai-chatbot-us-2026","toKind":"source","toLabel":"AI chatbot market share in United States of America May 2026","toHref":"/sources/statcounter-ai-chatbot-us-2026","evidenceLabel":"StatCounter Global Stats / AI chatbot market share in United States of America May 2026","evidenceDetail":"HHI is computed from listed StatCounter percentages, which sum to 100 across tracked assistants.","sourceId":"statcounter-ai-chatbot-us-2026","sourceUrl":"https://gs.statcounter.com/ai-chatbot-market-share/all/united-states-of-america","confidenceLevel":"medium","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-hhi:statcounter-browser-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-hhi","fromKind":"indicator","fromLabel":"Tracked market HHI","fromHref":"/indicators/market-hhi","toId":"source:statcounter-browser-us-2026","toKind":"source","toLabel":"Browser market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-browser-us-2026","evidenceLabel":"StatCounter Global Stats / Browser market share in United States of America April 2023","evidenceDetail":"HHI is computed from six named StatCounter shares and a residual Other category that closes coverage to 100 percent.","sourceId":"statcounter-browser-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=browser&region_hidden=US&granularity=monthly&statType=Browser&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"medium","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-hhi:statcounter-mobile-os-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-hhi","fromKind":"indicator","fromLabel":"Tracked market HHI","fromHref":"/indicators/market-hhi","toId":"source:statcounter-mobile-os-us-2026","toKind":"source","toLabel":"Mobile operating system market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-mobile-os-us-2026","evidenceLabel":"StatCounter Global Stats / Mobile operating system market share in United States of America April 2023","evidenceDetail":"HHI is computed from every category in the pinned StatCounter April mobile operating-system row; source labels and rounding are preserved.","sourceId":"statcounter-mobile-os-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Mobile&device_hidden=mobile&statType_hidden=os&region_hidden=US&granularity=monthly&statType=Operating%20System&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"medium","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-hhi:statcounter-search-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-hhi","fromKind":"indicator","fromLabel":"Tracked market HHI","fromHref":"/indicators/market-hhi","toId":"source:statcounter-search-us-2026","toKind":"source","toLabel":"Search engine market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-search-us-2026","evidenceLabel":"StatCounter Global Stats / Search engine market share in United States of America April 2023","evidenceDetail":"HHI is computed from six named StatCounter shares and a residual Other category that closes coverage to 100 percent.","sourceId":"statcounter-search-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=search_engine&region_hidden=US&granularity=monthly&statType=Search%20Engine&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"medium","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-hhi:statcounter-social-referral-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-hhi","fromKind":"indicator","fromLabel":"Tracked market HHI","fromHref":"/indicators/market-hhi","toId":"source:statcounter-social-referral-us-2026","toKind":"source","toLabel":"Social media referral share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-social-referral-us-2026","evidenceLabel":"StatCounter Global Stats / Social media referral share in United States of America April 2023","evidenceDetail":"HHI is computed from every category in the pinned StatCounter April social-media row; the denominator is outbound referral traffic to sampled third-party websites.","sourceId":"statcounter-social-referral-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=social_media&region_hidden=US&granularity=monthly&statType=Social%20Media&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"medium","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-leader-share:statcounter-ai-chatbot-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-leader-share","fromKind":"indicator","fromLabel":"Tracked leading-participant share","fromHref":"/indicators/market-leader-share","toId":"source:statcounter-ai-chatbot-us-2026","toKind":"source","toLabel":"AI chatbot market share in United States of America May 2026","toHref":"/sources/statcounter-ai-chatbot-us-2026","evidenceLabel":"StatCounter Global Stats / AI chatbot market share in United States of America May 2026","evidenceDetail":"Largest sourced non-aggregate participant share in the 2026 released anchor (ChatGPT).","sourceId":"statcounter-ai-chatbot-us-2026","sourceUrl":"https://gs.statcounter.com/ai-chatbot-market-share/all/united-states-of-america","confidenceLevel":"medium","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-leader-share:statcounter-browser-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-leader-share","fromKind":"indicator","fromLabel":"Tracked leading-participant share","fromHref":"/indicators/market-leader-share","toId":"source:statcounter-browser-us-2026","toKind":"source","toLabel":"Browser market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-browser-us-2026","evidenceLabel":"StatCounter Global Stats / Browser market share in United States of America April 2023","evidenceDetail":"Largest sourced non-aggregate participant share in the 2023 released anchor (Chrome).","sourceId":"statcounter-browser-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=browser&region_hidden=US&granularity=monthly&statType=Browser&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"low","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-leader-share:statcounter-mobile-os-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-leader-share","fromKind":"indicator","fromLabel":"Tracked leading-participant share","fromHref":"/indicators/market-leader-share","toId":"source:statcounter-mobile-os-us-2026","toKind":"source","toLabel":"Mobile operating system market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-mobile-os-us-2026","evidenceLabel":"StatCounter Global Stats / Mobile operating system market share in United States of America April 2023","evidenceDetail":"Largest sourced non-aggregate participant share in the 2023 released anchor (iOS).","sourceId":"statcounter-mobile-os-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Mobile&device_hidden=mobile&statType_hidden=os&region_hidden=US&granularity=monthly&statType=Operating%20System&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"medium","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-leader-share:statcounter-search-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-leader-share","fromKind":"indicator","fromLabel":"Tracked leading-participant share","fromHref":"/indicators/market-leader-share","toId":"source:statcounter-search-us-2026","toKind":"source","toLabel":"Search engine market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-search-us-2026","evidenceLabel":"StatCounter Global Stats / Search engine market share in United States of America April 2023","evidenceDetail":"Largest sourced non-aggregate participant share in the 2023 released anchor (Google Search).","sourceId":"statcounter-search-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=search_engine&region_hidden=US&granularity=monthly&statType=Search%20Engine&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"low","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"indicator-source:market-leader-share:statcounter-social-referral-us-2026","layer":"measurement","relationshipType":"indicator_source","relationshipLabel":"Indicator source custody","fromId":"indicator:market-leader-share","fromKind":"indicator","fromLabel":"Tracked leading-participant share","fromHref":"/indicators/market-leader-share","toId":"source:statcounter-social-referral-us-2026","toKind":"source","toLabel":"Social media referral share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-social-referral-us-2026","evidenceLabel":"StatCounter Global Stats / Social media referral share in United States of America April 2023","evidenceDetail":"Largest sourced non-aggregate participant share in the 2023 released anchor (Facebook).","sourceId":"statcounter-social-referral-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=social_media&region_hidden=US&granularity=monthly&statType=Social%20Media&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"medium","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link records indicator custody and does not extend the source beyond its stated universe, period, or unit."},{"id":"market-source:mkt-ai-chatbot:statcounter-ai-chatbot-us-2026","layer":"measurement","relationshipType":"market_source","relationshipLabel":"Market evidence custody","fromId":"market:mkt-ai-chatbot","fromKind":"market","fromLabel":"U.S. generative AI assistant usage","fromHref":"/markets/us-ai-assistant-usage","toId":"source:statcounter-ai-chatbot-us-2026","toKind":"source","toLabel":"AI chatbot market share in United States of America May 2026","toHref":"/sources/statcounter-ai-chatbot-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"AI chatbot market share in United States of America May 2026 supports the profile's definition, observation, participant row.","sourceId":"statcounter-ai-chatbot-us-2026","sourceUrl":"https://gs.statcounter.com/ai-chatbot-market-share/all/united-states-of-america","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link identifies evidence used by a market profile and does not endorse every claim in the underlying record."},{"id":"market-source:mkt-browser:statcounter-browser-us-2026","layer":"measurement","relationshipType":"market_source","relationshipLabel":"Market evidence custody","fromId":"market:mkt-browser","fromKind":"market","fromLabel":"U.S. browser usage","fromHref":"/markets/us-browser-usage","toId":"source:statcounter-browser-us-2026","toKind":"source","toLabel":"Browser market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-browser-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"Browser market share in United States of America, April 2023-April 2026 supports the profile's definition, observation, participant row.","sourceId":"statcounter-browser-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=browser&region_hidden=US&granularity=monthly&statType=Browser&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link identifies evidence used by a market profile and does not endorse every claim in the underlying record."},{"id":"market-source:mkt-mobile-os:statcounter-mobile-os-us-2026","layer":"measurement","relationshipType":"market_source","relationshipLabel":"Market evidence custody","fromId":"market:mkt-mobile-os","fromKind":"market","fromLabel":"U.S. mobile operating-system web usage","fromHref":"/markets/us-mobile-operating-system-usage","toId":"source:statcounter-mobile-os-us-2026","toKind":"source","toLabel":"Mobile operating system market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-mobile-os-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"Mobile operating system market share in United States of America, April 2023-April 2026 supports the profile's definition, observation, participant row.","sourceId":"statcounter-mobile-os-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Mobile&device_hidden=mobile&statType_hidden=os&region_hidden=US&granularity=monthly&statType=Operating%20System&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link identifies evidence used by a market profile and does not endorse every claim in the underlying record."},{"id":"market-source:mkt-search:statcounter-search-us-2026","layer":"measurement","relationshipType":"market_source","relationshipLabel":"Market evidence custody","fromId":"market:mkt-search","fromKind":"market","fromLabel":"U.S. search engine usage","fromHref":"/markets/us-search-engine-usage","toId":"source:statcounter-search-us-2026","toKind":"source","toLabel":"Search engine market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-search-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"Search engine market share in United States of America, April 2023-April 2026 supports the profile's definition, observation, participant row.","sourceId":"statcounter-search-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=search_engine&region_hidden=US&granularity=monthly&statType=Search%20Engine&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link identifies evidence used by a market profile and does not endorse every claim in the underlying record."},{"id":"market-source:mkt-social-referral:statcounter-social-referral-us-2026","layer":"measurement","relationshipType":"market_source","relationshipLabel":"Market evidence custody","fromId":"market:mkt-social-referral","fromKind":"market","fromLabel":"U.S. social-media referral traffic","fromHref":"/markets/us-social-media-referral-traffic","toId":"source:statcounter-social-referral-us-2026","toKind":"source","toLabel":"Social media referral share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-social-referral-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"Social media referral share in United States of America, April 2023-April 2026 supports the profile's definition, observation, participant row.","sourceId":"statcounter-social-referral-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=social_media&region_hidden=US&granularity=monthly&statType=Social%20Media&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source link identifies evidence used by a market profile and does not endorse every claim in the underlying record."},{"id":"profile-indicator:market:mkt-ai-chatbot:market-cr4","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-ai-chatbot","fromKind":"market","fromLabel":"U.S. generative AI assistant usage","fromHref":"/markets/us-ai-assistant-usage","toId":"indicator:market-cr4","toKind":"indicator","toLabel":"Tracked market CR4","toHref":"/indicators/market-cr4","evidenceLabel":"Tracked market CR4 registry","evidenceDetail":"U.S. generative AI assistant usage has 1 exact Market CR4 row spanning 2026-2026 across 1 registered source.","sourceId":"statcounter-ai-chatbot-us-2026","sourceUrl":"https://gs.statcounter.com/ai-chatbot-market-share/all/united-states-of-america","confidenceLevel":"bounded","indicatorId":"market-cr4","entityCode":"us-ai-assistant-usage","observationCount":1,"firstYear":2026,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-ai-chatbot-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-ai-chatbot:market-hhi","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-ai-chatbot","fromKind":"market","fromLabel":"U.S. generative AI assistant usage","fromHref":"/markets/us-ai-assistant-usage","toId":"indicator:market-hhi","toKind":"indicator","toLabel":"Tracked market HHI","toHref":"/indicators/market-hhi","evidenceLabel":"Tracked market HHI registry","evidenceDetail":"U.S. generative AI assistant usage has 1 exact Market HHI row spanning 2026-2026 across 1 registered source.","sourceId":"statcounter-ai-chatbot-us-2026","sourceUrl":"https://gs.statcounter.com/ai-chatbot-market-share/all/united-states-of-america","confidenceLevel":"bounded","indicatorId":"market-hhi","entityCode":"us-ai-assistant-usage","observationCount":1,"firstYear":2026,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-ai-chatbot-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-ai-chatbot:market-leader-share","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-ai-chatbot","fromKind":"market","fromLabel":"U.S. generative AI assistant usage","fromHref":"/markets/us-ai-assistant-usage","toId":"indicator:market-leader-share","toKind":"indicator","toLabel":"Tracked leading-participant share","toHref":"/indicators/market-leader-share","evidenceLabel":"Tracked leading-participant share registry","evidenceDetail":"U.S. generative AI assistant usage has 1 exact Market leader share row spanning 2026-2026 across 1 registered source.","sourceId":"statcounter-ai-chatbot-us-2026","sourceUrl":"https://gs.statcounter.com/ai-chatbot-market-share/all/united-states-of-america","confidenceLevel":"bounded","indicatorId":"market-leader-share","entityCode":"us-ai-assistant-usage","observationCount":1,"firstYear":2026,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-ai-chatbot-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-browser:market-cr4","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-browser","fromKind":"market","fromLabel":"U.S. browser usage","fromHref":"/markets/us-browser-usage","toId":"indicator:market-cr4","toKind":"indicator","toLabel":"Tracked market CR4","toHref":"/indicators/market-cr4","evidenceLabel":"Tracked market CR4 registry","evidenceDetail":"U.S. browser usage has 4 exact Market CR4 rows spanning 2023-2026 across 1 registered source.","sourceId":"statcounter-browser-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=browser&region_hidden=US&granularity=monthly&statType=Browser&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":"market-cr4","entityCode":"us-browser-usage","observationCount":4,"firstYear":2023,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-browser-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-browser:market-hhi","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-browser","fromKind":"market","fromLabel":"U.S. browser usage","fromHref":"/markets/us-browser-usage","toId":"indicator:market-hhi","toKind":"indicator","toLabel":"Tracked market HHI","toHref":"/indicators/market-hhi","evidenceLabel":"Tracked market HHI registry","evidenceDetail":"U.S. browser usage has 4 exact Market HHI rows spanning 2023-2026 across 1 registered source.","sourceId":"statcounter-browser-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=browser&region_hidden=US&granularity=monthly&statType=Browser&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":"market-hhi","entityCode":"us-browser-usage","observationCount":4,"firstYear":2023,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-browser-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-browser:market-leader-share","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-browser","fromKind":"market","fromLabel":"U.S. browser usage","fromHref":"/markets/us-browser-usage","toId":"indicator:market-leader-share","toKind":"indicator","toLabel":"Tracked leading-participant share","toHref":"/indicators/market-leader-share","evidenceLabel":"Tracked leading-participant share registry","evidenceDetail":"U.S. browser usage has 4 exact Market leader share rows spanning 2023-2026 across 1 registered source.","sourceId":"statcounter-browser-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=browser&region_hidden=US&granularity=monthly&statType=Browser&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":"market-leader-share","entityCode":"us-browser-usage","observationCount":4,"firstYear":2023,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-browser-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-mobile-os:market-cr4","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-mobile-os","fromKind":"market","fromLabel":"U.S. mobile operating-system web usage","fromHref":"/markets/us-mobile-operating-system-usage","toId":"indicator:market-cr4","toKind":"indicator","toLabel":"Tracked market CR4","toHref":"/indicators/market-cr4","evidenceLabel":"Tracked market CR4 registry","evidenceDetail":"U.S. mobile operating-system web usage has 4 exact Market CR4 rows spanning 2023-2026 across 1 registered source.","sourceId":"statcounter-mobile-os-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Mobile&device_hidden=mobile&statType_hidden=os&region_hidden=US&granularity=monthly&statType=Operating%20System&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":"market-cr4","entityCode":"us-mobile-operating-system-usage","observationCount":4,"firstYear":2023,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-mobile-os-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-mobile-os:market-hhi","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-mobile-os","fromKind":"market","fromLabel":"U.S. mobile operating-system web usage","fromHref":"/markets/us-mobile-operating-system-usage","toId":"indicator:market-hhi","toKind":"indicator","toLabel":"Tracked market HHI","toHref":"/indicators/market-hhi","evidenceLabel":"Tracked market HHI registry","evidenceDetail":"U.S. mobile operating-system web usage has 4 exact Market HHI rows spanning 2023-2026 across 1 registered source.","sourceId":"statcounter-mobile-os-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Mobile&device_hidden=mobile&statType_hidden=os&region_hidden=US&granularity=monthly&statType=Operating%20System&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":"market-hhi","entityCode":"us-mobile-operating-system-usage","observationCount":4,"firstYear":2023,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-mobile-os-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-mobile-os:market-leader-share","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-mobile-os","fromKind":"market","fromLabel":"U.S. mobile operating-system web usage","fromHref":"/markets/us-mobile-operating-system-usage","toId":"indicator:market-leader-share","toKind":"indicator","toLabel":"Tracked leading-participant share","toHref":"/indicators/market-leader-share","evidenceLabel":"Tracked leading-participant share registry","evidenceDetail":"U.S. mobile operating-system web usage has 4 exact Market leader share rows spanning 2023-2026 across 1 registered source.","sourceId":"statcounter-mobile-os-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Mobile&device_hidden=mobile&statType_hidden=os&region_hidden=US&granularity=monthly&statType=Operating%20System&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":"market-leader-share","entityCode":"us-mobile-operating-system-usage","observationCount":4,"firstYear":2023,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-mobile-os-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-search:market-cr4","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-search","fromKind":"market","fromLabel":"U.S. search engine usage","fromHref":"/markets/us-search-engine-usage","toId":"indicator:market-cr4","toKind":"indicator","toLabel":"Tracked market CR4","toHref":"/indicators/market-cr4","evidenceLabel":"Tracked market CR4 registry","evidenceDetail":"U.S. search engine usage has 4 exact Market CR4 rows spanning 2023-2026 across 1 registered source.","sourceId":"statcounter-search-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=search_engine&region_hidden=US&granularity=monthly&statType=Search%20Engine&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":"market-cr4","entityCode":"us-search-engine-usage","observationCount":4,"firstYear":2023,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-search-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-search:market-hhi","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-search","fromKind":"market","fromLabel":"U.S. search engine usage","fromHref":"/markets/us-search-engine-usage","toId":"indicator:market-hhi","toKind":"indicator","toLabel":"Tracked market HHI","toHref":"/indicators/market-hhi","evidenceLabel":"Tracked market HHI registry","evidenceDetail":"U.S. search engine usage has 4 exact Market HHI rows spanning 2023-2026 across 1 registered source.","sourceId":"statcounter-search-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=search_engine&region_hidden=US&granularity=monthly&statType=Search%20Engine&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":"market-hhi","entityCode":"us-search-engine-usage","observationCount":4,"firstYear":2023,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-search-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-search:market-leader-share","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-search","fromKind":"market","fromLabel":"U.S. search engine usage","fromHref":"/markets/us-search-engine-usage","toId":"indicator:market-leader-share","toKind":"indicator","toLabel":"Tracked leading-participant share","toHref":"/indicators/market-leader-share","evidenceLabel":"Tracked leading-participant share registry","evidenceDetail":"U.S. search engine usage has 4 exact Market leader share rows spanning 2023-2026 across 1 registered source.","sourceId":"statcounter-search-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=search_engine&region_hidden=US&granularity=monthly&statType=Search%20Engine&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":"market-leader-share","entityCode":"us-search-engine-usage","observationCount":4,"firstYear":2023,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-search-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-social-referral:market-cr4","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-social-referral","fromKind":"market","fromLabel":"U.S. social-media referral traffic","fromHref":"/markets/us-social-media-referral-traffic","toId":"indicator:market-cr4","toKind":"indicator","toLabel":"Tracked market CR4","toHref":"/indicators/market-cr4","evidenceLabel":"Tracked market CR4 registry","evidenceDetail":"U.S. social-media referral traffic has 4 exact Market CR4 rows spanning 2023-2026 across 1 registered source.","sourceId":"statcounter-social-referral-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=social_media&region_hidden=US&granularity=monthly&statType=Social%20Media&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":"market-cr4","entityCode":"us-social-media-referral-traffic","observationCount":4,"firstYear":2023,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-social-referral-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-social-referral:market-hhi","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-social-referral","fromKind":"market","fromLabel":"U.S. social-media referral traffic","fromHref":"/markets/us-social-media-referral-traffic","toId":"indicator:market-hhi","toKind":"indicator","toLabel":"Tracked market HHI","toHref":"/indicators/market-hhi","evidenceLabel":"Tracked market HHI registry","evidenceDetail":"U.S. social-media referral traffic has 4 exact Market HHI rows spanning 2023-2026 across 1 registered source.","sourceId":"statcounter-social-referral-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=social_media&region_hidden=US&granularity=monthly&statType=Social%20Media&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":"market-hhi","entityCode":"us-social-media-referral-traffic","observationCount":4,"firstYear":2023,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-social-referral-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"profile-indicator:market:mkt-social-referral:market-leader-share","layer":"measurement","relationshipType":"profile_indicator","relationshipLabel":"Observed by indicator","fromId":"market:mkt-social-referral","fromKind":"market","fromLabel":"U.S. social-media referral traffic","fromHref":"/markets/us-social-media-referral-traffic","toId":"indicator:market-leader-share","toKind":"indicator","toLabel":"Tracked leading-participant share","toHref":"/indicators/market-leader-share","evidenceLabel":"Tracked leading-participant share registry","evidenceDetail":"U.S. social-media referral traffic has 4 exact Market leader share rows spanning 2023-2026 across 1 registered source.","sourceId":"statcounter-social-referral-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=social_media&region_hidden=US&granularity=monthly&statType=Social%20Media&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":"market-leader-share","entityCode":"us-social-media-referral-traffic","observationCount":4,"firstYear":2023,"latestYear":2026,"preferredView":"trend","sourceIds":"statcounter-social-referral-us-2026","guardrail":"A profile-indicator edge records exact rows in one documented indicator contract; it does not make unlike measures comparable, define an antitrust market, or establish a legal or causal conclusion."},{"id":"issue-scope:digital-gateways:mkt-ai-chatbot","layer":"research","relationshipType":"issue_scope","relationshipLabel":"Issue program membership","fromId":"issue:digital-gateways","fromKind":"issue","fromLabel":"Digital platform gateways","fromHref":"/issues/digital-platform-gateways","toId":"market:mkt-ai-chatbot","toKind":"market","toLabel":"U.S. generative AI assistant usage","toHref":"/markets/us-ai-assistant-usage","evidenceLabel":"Competition issue scope contract","evidenceDetail":"U.S. generative AI assistant usage is an explicitly curated member of the Digital platform gateways research program while retaining its own product boundary, geography, denominator, and comparison contract.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"An editorial issue membership supports research navigation only; it does not combine the member markets, define a broader antitrust market, or establish competitive harm or causation."},{"id":"issue-scope:digital-gateways:mkt-browser","layer":"research","relationshipType":"issue_scope","relationshipLabel":"Issue program membership","fromId":"issue:digital-gateways","fromKind":"issue","fromLabel":"Digital platform gateways","fromHref":"/issues/digital-platform-gateways","toId":"market:mkt-browser","toKind":"market","toLabel":"U.S. browser usage","toHref":"/markets/us-browser-usage","evidenceLabel":"Competition issue scope contract","evidenceDetail":"U.S. browser usage is an explicitly curated member of the Digital platform gateways research program while retaining its own product boundary, geography, denominator, and comparison contract.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"An editorial issue membership supports research navigation only; it does not combine the member markets, define a broader antitrust market, or establish competitive harm or causation."},{"id":"issue-scope:digital-gateways:mkt-mobile-os","layer":"research","relationshipType":"issue_scope","relationshipLabel":"Issue program membership","fromId":"issue:digital-gateways","fromKind":"issue","fromLabel":"Digital platform gateways","fromHref":"/issues/digital-platform-gateways","toId":"market:mkt-mobile-os","toKind":"market","toLabel":"U.S. mobile operating-system web usage","toHref":"/markets/us-mobile-operating-system-usage","evidenceLabel":"Competition issue scope contract","evidenceDetail":"U.S. mobile operating-system web usage is an explicitly curated member of the Digital platform gateways research program while retaining its own product boundary, geography, denominator, and comparison contract.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"An editorial issue membership supports research navigation only; it does not combine the member markets, define a broader antitrust market, or establish competitive harm or causation."},{"id":"issue-scope:digital-gateways:mkt-search","layer":"research","relationshipType":"issue_scope","relationshipLabel":"Issue program membership","fromId":"issue:digital-gateways","fromKind":"issue","fromLabel":"Digital platform gateways","fromHref":"/issues/digital-platform-gateways","toId":"market:mkt-search","toKind":"market","toLabel":"U.S. search engine usage","toHref":"/markets/us-search-engine-usage","evidenceLabel":"Competition issue scope contract","evidenceDetail":"U.S. search engine usage is an explicitly curated member of the Digital platform gateways research program while retaining its own product boundary, geography, denominator, and comparison contract.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"An editorial issue membership supports research navigation only; it does not combine the member markets, define a broader antitrust market, or establish competitive harm or causation."},{"id":"issue-scope:digital-gateways:mkt-social-referral","layer":"research","relationshipType":"issue_scope","relationshipLabel":"Issue program membership","fromId":"issue:digital-gateways","fromKind":"issue","fromLabel":"Digital platform gateways","fromHref":"/issues/digital-platform-gateways","toId":"market:mkt-social-referral","toKind":"market","toLabel":"U.S. social-media referral traffic","toHref":"/markets/us-social-media-referral-traffic","evidenceLabel":"Competition issue scope contract","evidenceDetail":"U.S. social-media referral traffic is an explicitly curated member of the Digital platform gateways research program while retaining its own product boundary, geography, denominator, and comparison contract.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"An editorial issue membership supports research navigation only; it does not combine the member markets, define a broader antitrust market, or establish competitive harm or causation."},{"id":"question-indicator:market-cr4:us-browser-usage:market-cr4","layer":"research","relationshipType":"question_indicator","relationshipLabel":"Named measurement family","fromId":"question:market-cr4:us-browser-usage","fromKind":"question","fromLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","fromHref":"/research/agenda/market-cr4--us-browser-usage","toId":"indicator:market-cr4","toKind":"indicator","toLabel":"Tracked market CR4","toHref":"/indicators/market-cr4","evidenceLabel":"Research agenda metric contract","evidenceDetail":"Q31 is framed by Four-participant concentration ratio and resolves to the canonical market-cr4 indicator dossier.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A question-indicator link records the named measurement family used to frame a public question; it does not turn an observed change into causation, harm, market power, or a legal conclusion."},{"id":"question-indicator:market-cr4:us-mobile-operating-system-usage:market-cr4","layer":"research","relationshipType":"question_indicator","relationshipLabel":"Named measurement family","fromId":"question:market-cr4:us-mobile-operating-system-usage","fromKind":"question","fromLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","fromHref":"/research/agenda/market-cr4--us-mobile-operating-system-usage","toId":"indicator:market-cr4","toKind":"indicator","toLabel":"Tracked market CR4","toHref":"/indicators/market-cr4","evidenceLabel":"Research agenda metric contract","evidenceDetail":"Q35 is framed by Four-participant concentration ratio and resolves to the canonical market-cr4 indicator dossier.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A question-indicator link records the named measurement family used to frame a public question; it does not turn an observed change into causation, harm, market power, or a legal conclusion."},{"id":"question-indicator:market-cr4:us-search-engine-usage:market-cr4","layer":"research","relationshipType":"question_indicator","relationshipLabel":"Named measurement family","fromId":"question:market-cr4:us-search-engine-usage","fromKind":"question","fromLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","fromHref":"/research/agenda/market-cr4--us-search-engine-usage","toId":"indicator:market-cr4","toKind":"indicator","toLabel":"Tracked market CR4","toHref":"/indicators/market-cr4","evidenceLabel":"Research agenda metric contract","evidenceDetail":"Q38 is framed by Four-participant concentration ratio and resolves to the canonical market-cr4 indicator dossier.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A question-indicator link records the named measurement family used to frame a public question; it does not turn an observed change into causation, harm, market power, or a legal conclusion."},{"id":"question-indicator:market-cr4:us-social-media-referral-traffic:market-cr4","layer":"research","relationshipType":"question_indicator","relationshipLabel":"Named measurement family","fromId":"question:market-cr4:us-social-media-referral-traffic","fromKind":"question","fromLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","fromHref":"/research/agenda/market-cr4--us-social-media-referral-traffic","toId":"indicator:market-cr4","toKind":"indicator","toLabel":"Tracked market CR4","toHref":"/indicators/market-cr4","evidenceLabel":"Research agenda metric contract","evidenceDetail":"Q41 is framed by Four-participant concentration ratio and resolves to the canonical market-cr4 indicator dossier.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A question-indicator link records the named measurement family used to frame a public question; it does not turn an observed change into causation, harm, market power, or a legal conclusion."},{"id":"question-indicator:market-hhi:us-browser-usage:market-hhi","layer":"research","relationshipType":"question_indicator","relationshipLabel":"Named measurement family","fromId":"question:market-hhi:us-browser-usage","fromKind":"question","fromLabel":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","fromHref":"/research/agenda/market-hhi--us-browser-usage","toId":"indicator:market-hhi","toKind":"indicator","toLabel":"Tracked market HHI","toHref":"/indicators/market-hhi","evidenceLabel":"Research agenda metric contract","evidenceDetail":"Q32 is framed by Herfindahl-Hirschman Index and resolves to the canonical market-hhi indicator dossier.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A question-indicator link records the named measurement family used to frame a public question; it does not turn an observed change into causation, harm, market power, or a legal conclusion."},{"id":"question-indicator:market-hhi:us-mobile-operating-system-usage:market-hhi","layer":"research","relationshipType":"question_indicator","relationshipLabel":"Named measurement family","fromId":"question:market-hhi:us-mobile-operating-system-usage","fromKind":"question","fromLabel":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","fromHref":"/research/agenda/market-hhi--us-mobile-operating-system-usage","toId":"indicator:market-hhi","toKind":"indicator","toLabel":"Tracked market HHI","toHref":"/indicators/market-hhi","evidenceLabel":"Research agenda metric contract","evidenceDetail":"Q36 is framed by Herfindahl-Hirschman Index and resolves to the canonical market-hhi indicator dossier.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A question-indicator link records the named measurement family used to frame a public question; it does not turn an observed change into causation, harm, market power, or a legal conclusion."},{"id":"question-indicator:market-hhi:us-search-engine-usage:market-hhi","layer":"research","relationshipType":"question_indicator","relationshipLabel":"Named measurement family","fromId":"question:market-hhi:us-search-engine-usage","fromKind":"question","fromLabel":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","fromHref":"/research/agenda/market-hhi--us-search-engine-usage","toId":"indicator:market-hhi","toKind":"indicator","toLabel":"Tracked market HHI","toHref":"/indicators/market-hhi","evidenceLabel":"Research agenda metric contract","evidenceDetail":"Q39 is framed by Herfindahl-Hirschman Index and resolves to the canonical market-hhi indicator dossier.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A question-indicator link records the named measurement family used to frame a public question; it does not turn an observed change into causation, harm, market power, or a legal conclusion."},{"id":"question-indicator:market-hhi:us-social-media-referral-traffic:market-hhi","layer":"research","relationshipType":"question_indicator","relationshipLabel":"Named measurement family","fromId":"question:market-hhi:us-social-media-referral-traffic","fromKind":"question","fromLabel":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","fromHref":"/research/agenda/market-hhi--us-social-media-referral-traffic","toId":"indicator:market-hhi","toKind":"indicator","toLabel":"Tracked market HHI","toHref":"/indicators/market-hhi","evidenceLabel":"Research agenda metric contract","evidenceDetail":"Q42 is framed by Herfindahl-Hirschman Index and resolves to the canonical market-hhi indicator dossier.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A question-indicator link records the named measurement family used to frame a public question; it does not turn an observed change into causation, harm, market power, or a legal conclusion."},{"id":"question-indicator:market-leader-share:us-browser-usage:market-leader-share","layer":"research","relationshipType":"question_indicator","relationshipLabel":"Named measurement family","fromId":"question:market-leader-share:us-browser-usage","fromKind":"question","fromLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","fromHref":"/research/agenda/market-leader-share--us-browser-usage","toId":"indicator:market-leader-share","toKind":"indicator","toLabel":"Tracked leading-participant share","toHref":"/indicators/market-leader-share","evidenceLabel":"Research agenda metric contract","evidenceDetail":"Q33 is framed by Leading-participant share and resolves to the canonical market-leader-share indicator dossier.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A question-indicator link records the named measurement family used to frame a public question; it does not turn an observed change into causation, harm, market power, or a legal conclusion."},{"id":"question-indicator:market-leader-share:us-mobile-operating-system-usage:market-leader-share","layer":"research","relationshipType":"question_indicator","relationshipLabel":"Named measurement family","fromId":"question:market-leader-share:us-mobile-operating-system-usage","fromKind":"question","fromLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","fromHref":"/research/agenda/market-leader-share--us-mobile-operating-system-usage","toId":"indicator:market-leader-share","toKind":"indicator","toLabel":"Tracked leading-participant share","toHref":"/indicators/market-leader-share","evidenceLabel":"Research agenda metric contract","evidenceDetail":"Q37 is framed by Leading-participant share and resolves to the canonical market-leader-share indicator dossier.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A question-indicator link records the named measurement family used to frame a public question; it does not turn an observed change into causation, harm, market power, or a legal conclusion."},{"id":"question-indicator:market-leader-share:us-search-engine-usage:market-leader-share","layer":"research","relationshipType":"question_indicator","relationshipLabel":"Named measurement family","fromId":"question:market-leader-share:us-search-engine-usage","fromKind":"question","fromLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","fromHref":"/research/agenda/market-leader-share--us-search-engine-usage","toId":"indicator:market-leader-share","toKind":"indicator","toLabel":"Tracked leading-participant share","toHref":"/indicators/market-leader-share","evidenceLabel":"Research agenda metric contract","evidenceDetail":"Q40 is framed by Leading-participant share and resolves to the canonical market-leader-share indicator dossier.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A question-indicator link records the named measurement family used to frame a public question; it does not turn an observed change into causation, harm, market power, or a legal conclusion."},{"id":"question-indicator:market-leader-share:us-social-media-referral-traffic:market-leader-share","layer":"research","relationshipType":"question_indicator","relationshipLabel":"Named measurement family","fromId":"question:market-leader-share:us-social-media-referral-traffic","fromKind":"question","fromLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","fromHref":"/research/agenda/market-leader-share--us-social-media-referral-traffic","toId":"indicator:market-leader-share","toKind":"indicator","toLabel":"Tracked leading-participant share","toHref":"/indicators/market-leader-share","evidenceLabel":"Research agenda metric contract","evidenceDetail":"Q43 is framed by Leading-participant share and resolves to the canonical market-leader-share indicator dossier.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A question-indicator link records the named measurement family used to frame a public question; it does not turn an observed change into causation, harm, market power, or a legal conclusion."},{"id":"report-market:insight-digital-gateways-change:mkt-browser","layer":"research","relationshipType":"report_market","relationshipLabel":"Covered market profile","fromId":"report:insight-digital-gateways-change","fromKind":"report","fromLabel":"Four digital usage systems traced four different structural paths.","fromHref":"/insights/digital-gateways-change","toId":"market:mkt-browser","toKind":"market","toLabel":"U.S. browser usage","toHref":"/markets/us-browser-usage","evidenceLabel":"Competition Insight signal route","evidenceDetail":"AR-CI-2026-02 contains at least one signal whose canonical entity route resolves exactly to U.S. browser usage; broader topic similarity is not used.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A publication link identifies an explicitly covered market profile and does not make separately defined markets interchangeable."},{"id":"report-market:insight-digital-gateways-change:mkt-mobile-os","layer":"research","relationshipType":"report_market","relationshipLabel":"Covered market profile","fromId":"report:insight-digital-gateways-change","fromKind":"report","fromLabel":"Four digital usage systems traced four different structural paths.","fromHref":"/insights/digital-gateways-change","toId":"market:mkt-mobile-os","toKind":"market","toLabel":"U.S. mobile operating-system web usage","toHref":"/markets/us-mobile-operating-system-usage","evidenceLabel":"Competition Insight signal route","evidenceDetail":"AR-CI-2026-02 contains at least one signal whose canonical entity route resolves exactly to U.S. mobile operating-system web usage; broader topic similarity is not used.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A publication link identifies an explicitly covered market profile and does not make separately defined markets interchangeable."},{"id":"report-market:insight-digital-gateways-change:mkt-search","layer":"research","relationshipType":"report_market","relationshipLabel":"Covered market profile","fromId":"report:insight-digital-gateways-change","fromKind":"report","fromLabel":"Four digital usage systems traced four different structural paths.","fromHref":"/insights/digital-gateways-change","toId":"market:mkt-search","toKind":"market","toLabel":"U.S. search engine usage","toHref":"/markets/us-search-engine-usage","evidenceLabel":"Competition Insight signal route","evidenceDetail":"AR-CI-2026-02 contains at least one signal whose canonical entity route resolves exactly to U.S. search engine usage; broader topic similarity is not used.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A publication link identifies an explicitly covered market profile and does not make separately defined markets interchangeable."},{"id":"report-market:insight-digital-gateways-change:mkt-social-referral","layer":"research","relationshipType":"report_market","relationshipLabel":"Covered market profile","fromId":"report:insight-digital-gateways-change","fromKind":"report","fromLabel":"Four digital usage systems traced four different structural paths.","fromHref":"/insights/digital-gateways-change","toId":"market:mkt-social-referral","toKind":"market","toLabel":"U.S. social-media referral traffic","toHref":"/markets/us-social-media-referral-traffic","evidenceLabel":"Competition Insight signal route","evidenceDetail":"AR-CI-2026-02 contains at least one signal whose canonical entity route resolves exactly to U.S. social-media referral traffic; broader topic similarity is not used.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A publication link identifies an explicitly covered market profile and does not make separately defined markets interchangeable."},{"id":"report-market:rep-digital-gateways:mkt-ai-chatbot","layer":"research","relationshipType":"report_market","relationshipLabel":"Covered market profile","fromId":"report:rep-digital-gateways","fromKind":"report","fromLabel":"Five Digital Gateways","fromHref":"/reports/digital-gateways-brief","toId":"market:mkt-ai-chatbot","toKind":"market","toLabel":"U.S. generative AI assistant usage","toHref":"/markets/us-ai-assistant-usage","evidenceLabel":"Report scope contract","evidenceDetail":"Five Digital Gateways explicitly lists U.S. generative AI assistant usage in its related-market scope.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A publication link identifies an explicitly covered market profile and does not make separately defined markets interchangeable."},{"id":"report-market:rep-digital-gateways:mkt-browser","layer":"research","relationshipType":"report_market","relationshipLabel":"Covered market profile","fromId":"report:rep-digital-gateways","fromKind":"report","fromLabel":"Five Digital Gateways","fromHref":"/reports/digital-gateways-brief","toId":"market:mkt-browser","toKind":"market","toLabel":"U.S. browser usage","toHref":"/markets/us-browser-usage","evidenceLabel":"Report scope contract","evidenceDetail":"Five Digital Gateways explicitly lists U.S. browser usage in its related-market scope.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A publication link identifies an explicitly covered market profile and does not make separately defined markets interchangeable."},{"id":"report-market:rep-digital-gateways:mkt-mobile-os","layer":"research","relationshipType":"report_market","relationshipLabel":"Covered market profile","fromId":"report:rep-digital-gateways","fromKind":"report","fromLabel":"Five Digital Gateways","fromHref":"/reports/digital-gateways-brief","toId":"market:mkt-mobile-os","toKind":"market","toLabel":"U.S. mobile operating-system web usage","toHref":"/markets/us-mobile-operating-system-usage","evidenceLabel":"Report scope contract","evidenceDetail":"Five Digital Gateways explicitly lists U.S. mobile operating-system web usage in its related-market scope.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A publication link identifies an explicitly covered market profile and does not make separately defined markets interchangeable."},{"id":"report-market:rep-digital-gateways:mkt-search","layer":"research","relationshipType":"report_market","relationshipLabel":"Covered market profile","fromId":"report:rep-digital-gateways","fromKind":"report","fromLabel":"Five Digital Gateways","fromHref":"/reports/digital-gateways-brief","toId":"market:mkt-search","toKind":"market","toLabel":"U.S. search engine usage","toHref":"/markets/us-search-engine-usage","evidenceLabel":"Report scope contract","evidenceDetail":"Five Digital Gateways explicitly lists U.S. search engine usage in its related-market scope.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A publication link identifies an explicitly covered market profile and does not make separately defined markets interchangeable."},{"id":"report-market:rep-digital-gateways:mkt-social-referral","layer":"research","relationshipType":"report_market","relationshipLabel":"Covered market profile","fromId":"report:rep-digital-gateways","fromKind":"report","fromLabel":"Five Digital Gateways","fromHref":"/reports/digital-gateways-brief","toId":"market:mkt-social-referral","toKind":"market","toLabel":"U.S. social-media referral traffic","toHref":"/markets/us-social-media-referral-traffic","evidenceLabel":"Report scope contract","evidenceDetail":"Five Digital Gateways explicitly lists U.S. social-media referral traffic in its related-market scope.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A publication link identifies an explicitly covered market profile and does not make separately defined markets interchangeable."},{"id":"report-source:insight-digital-gateways-change:statcounter-browser-us-2026","layer":"research","relationshipType":"report_source","relationshipLabel":"Declared publication source","fromId":"report:insight-digital-gateways-change","fromKind":"report","fromLabel":"Four digital usage systems traced four different structural paths.","fromHref":"/insights/digital-gateways-change","toId":"source:statcounter-browser-us-2026","toKind":"source","toLabel":"Browser market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-browser-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"Browser market share in United States of America, April 2023-April 2026 appears in the source-custodied signal packet for AR-CI-2026-02.","sourceId":"statcounter-browser-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=browser&region_hidden=US&granularity=monthly&statType=Browser&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source edge records the public evidence basis declared by the publication and does not erase the source's limitations."},{"id":"report-source:insight-digital-gateways-change:statcounter-mobile-os-us-2026","layer":"research","relationshipType":"report_source","relationshipLabel":"Declared publication source","fromId":"report:insight-digital-gateways-change","fromKind":"report","fromLabel":"Four digital usage systems traced four different structural paths.","fromHref":"/insights/digital-gateways-change","toId":"source:statcounter-mobile-os-us-2026","toKind":"source","toLabel":"Mobile operating system market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-mobile-os-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"Mobile operating system market share in United States of America, April 2023-April 2026 appears in the source-custodied signal packet for AR-CI-2026-02.","sourceId":"statcounter-mobile-os-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Mobile&device_hidden=mobile&statType_hidden=os&region_hidden=US&granularity=monthly&statType=Operating%20System&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source edge records the public evidence basis declared by the publication and does not erase the source's limitations."},{"id":"report-source:insight-digital-gateways-change:statcounter-search-us-2026","layer":"research","relationshipType":"report_source","relationshipLabel":"Declared publication source","fromId":"report:insight-digital-gateways-change","fromKind":"report","fromLabel":"Four digital usage systems traced four different structural paths.","fromHref":"/insights/digital-gateways-change","toId":"source:statcounter-search-us-2026","toKind":"source","toLabel":"Search engine market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-search-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"Search engine market share in United States of America, April 2023-April 2026 appears in the source-custodied signal packet for AR-CI-2026-02.","sourceId":"statcounter-search-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=search_engine&region_hidden=US&granularity=monthly&statType=Search%20Engine&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source edge records the public evidence basis declared by the publication and does not erase the source's limitations."},{"id":"report-source:insight-digital-gateways-change:statcounter-social-referral-us-2026","layer":"research","relationshipType":"report_source","relationshipLabel":"Declared publication source","fromId":"report:insight-digital-gateways-change","fromKind":"report","fromLabel":"Four digital usage systems traced four different structural paths.","fromHref":"/insights/digital-gateways-change","toId":"source:statcounter-social-referral-us-2026","toKind":"source","toLabel":"Social media referral share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-social-referral-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"Social media referral share in United States of America, April 2023-April 2026 appears in the source-custodied signal packet for AR-CI-2026-02.","sourceId":"statcounter-social-referral-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=social_media&region_hidden=US&granularity=monthly&statType=Social%20Media&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source edge records the public evidence basis declared by the publication and does not erase the source's limitations."},{"id":"report-source:rep-digital-gateways:statcounter-ai-chatbot-us-2026","layer":"research","relationshipType":"report_source","relationshipLabel":"Declared publication source","fromId":"report:rep-digital-gateways","fromKind":"report","fromLabel":"Five Digital Gateways","fromHref":"/reports/digital-gateways-brief","toId":"source:statcounter-ai-chatbot-us-2026","toKind":"source","toLabel":"AI chatbot market share in United States of America May 2026","toHref":"/sources/statcounter-ai-chatbot-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"AI chatbot market share in United States of America May 2026 appears in the report's encoded source basis.","sourceId":"statcounter-ai-chatbot-us-2026","sourceUrl":"https://gs.statcounter.com/ai-chatbot-market-share/all/united-states-of-america","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source edge records the public evidence basis declared by the publication and does not erase the source's limitations."},{"id":"report-source:rep-digital-gateways:statcounter-browser-us-2026","layer":"research","relationshipType":"report_source","relationshipLabel":"Declared publication source","fromId":"report:rep-digital-gateways","fromKind":"report","fromLabel":"Five Digital Gateways","fromHref":"/reports/digital-gateways-brief","toId":"source:statcounter-browser-us-2026","toKind":"source","toLabel":"Browser market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-browser-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"Browser market share in United States of America, April 2023-April 2026 appears in the report's encoded source basis.","sourceId":"statcounter-browser-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=browser&region_hidden=US&granularity=monthly&statType=Browser&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source edge records the public evidence basis declared by the publication and does not erase the source's limitations."},{"id":"report-source:rep-digital-gateways:statcounter-mobile-os-us-2026","layer":"research","relationshipType":"report_source","relationshipLabel":"Declared publication source","fromId":"report:rep-digital-gateways","fromKind":"report","fromLabel":"Five Digital Gateways","fromHref":"/reports/digital-gateways-brief","toId":"source:statcounter-mobile-os-us-2026","toKind":"source","toLabel":"Mobile operating system market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-mobile-os-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"Mobile operating system market share in United States of America, April 2023-April 2026 appears in the report's encoded source basis.","sourceId":"statcounter-mobile-os-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Mobile&device_hidden=mobile&statType_hidden=os&region_hidden=US&granularity=monthly&statType=Operating%20System&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source edge records the public evidence basis declared by the publication and does not erase the source's limitations."},{"id":"report-source:rep-digital-gateways:statcounter-search-us-2026","layer":"research","relationshipType":"report_source","relationshipLabel":"Declared publication source","fromId":"report:rep-digital-gateways","fromKind":"report","fromLabel":"Five Digital Gateways","fromHref":"/reports/digital-gateways-brief","toId":"source:statcounter-search-us-2026","toKind":"source","toLabel":"Search engine market share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-search-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"Search engine market share in United States of America, April 2023-April 2026 appears in the report's encoded source basis.","sourceId":"statcounter-search-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=search_engine&region_hidden=US&granularity=monthly&statType=Search%20Engine&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source edge records the public evidence basis declared by the publication and does not erase the source's limitations."},{"id":"report-source:rep-digital-gateways:statcounter-social-referral-us-2026","layer":"research","relationshipType":"report_source","relationshipLabel":"Declared publication source","fromId":"report:rep-digital-gateways","fromKind":"report","fromLabel":"Five Digital Gateways","fromHref":"/reports/digital-gateways-brief","toId":"source:statcounter-social-referral-us-2026","toKind":"source","toLabel":"Social media referral share in United States of America, April 2023-April 2026","toHref":"/sources/statcounter-social-referral-us-2026","evidenceLabel":"StatCounter Global Stats","evidenceDetail":"Social media referral share in United States of America, April 2023-April 2026 appears in the report's encoded source basis.","sourceId":"statcounter-social-referral-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=social_media&region_hidden=US&granularity=monthly&statType=Social%20Media&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A source edge records the public evidence basis declared by the publication and does not erase the source's limitations."},{"id":"topic-issue:digital-platforms:digital-gateways","layer":"research","relationshipType":"topic_issue","relationshipLabel":"Declared issue-program membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"issue:digital-gateways","toKind":"issue","toLabel":"Digital platform gateways","toHref":"/issues/digital-platform-gateways","evidenceLabel":"Research topic issue contract","evidenceDetail":"Digital platform gateways is explicitly included in the Digital Platforms institutional research contract.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-issue link records one declared institutional membership. It does not merge the issue program's markets, establish harm, rank importance, or imply a shared method or finding."},{"id":"topic-issue:market-structure:digital-gateways","layer":"research","relationshipType":"topic_issue","relationshipLabel":"Declared issue-program membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"issue:digital-gateways","toKind":"issue","toLabel":"Digital platform gateways","toHref":"/issues/digital-platform-gateways","evidenceLabel":"Research topic issue contract","evidenceDetail":"Digital platform gateways is explicitly included in the Market Structure institutional research contract.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-issue link records one declared institutional membership. It does not merge the issue program's markets, establish harm, rank importance, or imply a shared method or finding."},{"id":"topic-issue:merger-review:digital-gateways","layer":"research","relationshipType":"topic_issue","relationshipLabel":"Declared issue-program membership","fromId":"topic:merger-review","fromKind":"topic","fromLabel":"Merger Review","fromHref":"/research/topics/merger-review","toId":"issue:digital-gateways","toKind":"issue","toLabel":"Digital platform gateways","toHref":"/issues/digital-platform-gateways","evidenceLabel":"Research topic issue contract","evidenceDetail":"Digital platform gateways is explicitly included in the Merger Review institutional research contract.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-issue link records one declared institutional membership. It does not merge the issue program's markets, establish harm, rank importance, or imply a shared method or finding."},{"id":"topic-publication:digital-platforms:AR-CI-2026-02","layer":"research","relationshipType":"topic_publication","relationshipLabel":"Declared topic membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"report:insight-digital-gateways-change","toKind":"report","toLabel":"Four digital usage systems traced four different structural paths.","toHref":"/insights/digital-gateways-change","evidenceLabel":"Publication theme contract","evidenceDetail":"AR-CI-2026-02, Four digital usage systems traced four different structural paths., carries the exact Digital Platforms publication-theme membership.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-publication link records one exact editorial theme membership. It does not rank publication quality, evidence strength, importance, impact, or policy effect."},{"id":"topic-publication:digital-platforms:AR-RB-2026-02","layer":"research","relationshipType":"topic_publication","relationshipLabel":"Declared topic membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"report:rep-digital-gateways","toKind":"report","toLabel":"Five Digital Gateways","toHref":"/reports/digital-gateways-brief","evidenceLabel":"Publication theme contract","evidenceDetail":"AR-RB-2026-02, Five Digital Gateways, carries the exact Digital Platforms publication-theme membership.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-publication link records one exact editorial theme membership. It does not rank publication quality, evidence strength, importance, impact, or policy effect."},{"id":"topic-publication:market-structure:AR-CI-2026-02","layer":"research","relationshipType":"topic_publication","relationshipLabel":"Declared topic membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"report:insight-digital-gateways-change","toKind":"report","toLabel":"Four digital usage systems traced four different structural paths.","toHref":"/insights/digital-gateways-change","evidenceLabel":"Publication theme contract","evidenceDetail":"AR-CI-2026-02, Four digital usage systems traced four different structural paths., carries the exact Market Structure publication-theme membership.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-publication link records one exact editorial theme membership. It does not rank publication quality, evidence strength, importance, impact, or policy effect."},{"id":"topic-publication:market-structure:AR-RB-2026-02","layer":"research","relationshipType":"topic_publication","relationshipLabel":"Declared topic membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"report:rep-digital-gateways","toKind":"report","toLabel":"Five Digital Gateways","toHref":"/reports/digital-gateways-brief","evidenceLabel":"Publication theme contract","evidenceDetail":"AR-RB-2026-02, Five Digital Gateways, carries the exact Market Structure publication-theme membership.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-publication link records one exact editorial theme membership. It does not rank publication quality, evidence strength, importance, impact, or policy effect."},{"id":"topic-question:digital-platforms:market-cr4:us-browser-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"question:market-cr4:us-browser-usage","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-cr4--us-browser-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q31, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Digital Platforms.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:digital-platforms:market-cr4:us-mobile-operating-system-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"question:market-cr4:us-mobile-operating-system-usage","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-cr4--us-mobile-operating-system-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q35, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Digital Platforms.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:digital-platforms:market-cr4:us-search-engine-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"question:market-cr4:us-search-engine-usage","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-cr4--us-search-engine-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q38, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Digital Platforms.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:digital-platforms:market-cr4:us-social-media-referral-traffic","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"question:market-cr4:us-social-media-referral-traffic","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-cr4--us-social-media-referral-traffic","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q41, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Digital Platforms.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:digital-platforms:market-hhi:us-browser-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"question:market-hhi:us-browser-usage","toKind":"question","toLabel":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","toHref":"/research/agenda/market-hhi--us-browser-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q32, Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?, is included by the exact domain or entity contract for Digital Platforms.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:digital-platforms:market-hhi:us-mobile-operating-system-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"question:market-hhi:us-mobile-operating-system-usage","toKind":"question","toLabel":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","toHref":"/research/agenda/market-hhi--us-mobile-operating-system-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q36, Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?, is included by the exact domain or entity contract for Digital Platforms.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:digital-platforms:market-hhi:us-search-engine-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"question:market-hhi:us-search-engine-usage","toKind":"question","toLabel":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","toHref":"/research/agenda/market-hhi--us-search-engine-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q39, Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?, is included by the exact domain or entity contract for Digital Platforms.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:digital-platforms:market-hhi:us-social-media-referral-traffic","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"question:market-hhi:us-social-media-referral-traffic","toKind":"question","toLabel":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","toHref":"/research/agenda/market-hhi--us-social-media-referral-traffic","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q42, Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?, is included by the exact domain or entity contract for Digital Platforms.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:digital-platforms:market-leader-share:us-browser-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"question:market-leader-share:us-browser-usage","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-leader-share--us-browser-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q33, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Digital Platforms.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:digital-platforms:market-leader-share:us-mobile-operating-system-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"question:market-leader-share:us-mobile-operating-system-usage","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-leader-share--us-mobile-operating-system-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q37, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Digital Platforms.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:digital-platforms:market-leader-share:us-search-engine-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"question:market-leader-share:us-search-engine-usage","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-leader-share--us-search-engine-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q40, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Digital Platforms.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:digital-platforms:market-leader-share:us-social-media-referral-traffic","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:digital-platforms","fromKind":"topic","fromLabel":"Digital Platforms","fromHref":"/research/topics/digital-platforms","toId":"question:market-leader-share:us-social-media-referral-traffic","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-leader-share--us-social-media-referral-traffic","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q43, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Digital Platforms.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:market-structure:market-cr4:us-browser-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"question:market-cr4:us-browser-usage","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-cr4--us-browser-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q31, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Market Structure.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:market-structure:market-cr4:us-mobile-operating-system-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"question:market-cr4:us-mobile-operating-system-usage","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-cr4--us-mobile-operating-system-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q35, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Market Structure.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:market-structure:market-cr4:us-search-engine-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"question:market-cr4:us-search-engine-usage","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-cr4--us-search-engine-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q38, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Market Structure.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:market-structure:market-cr4:us-social-media-referral-traffic","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"question:market-cr4:us-social-media-referral-traffic","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-cr4--us-social-media-referral-traffic","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q41, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Market Structure.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:market-structure:market-hhi:us-browser-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"question:market-hhi:us-browser-usage","toKind":"question","toLabel":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","toHref":"/research/agenda/market-hhi--us-browser-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q32, Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?, is included by the exact domain or entity contract for Market Structure.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:market-structure:market-hhi:us-mobile-operating-system-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"question:market-hhi:us-mobile-operating-system-usage","toKind":"question","toLabel":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","toHref":"/research/agenda/market-hhi--us-mobile-operating-system-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q36, Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?, is included by the exact domain or entity contract for Market Structure.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:market-structure:market-hhi:us-search-engine-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"question:market-hhi:us-search-engine-usage","toKind":"question","toLabel":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","toHref":"/research/agenda/market-hhi--us-search-engine-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q39, Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?, is included by the exact domain or entity contract for Market Structure.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:market-structure:market-hhi:us-social-media-referral-traffic","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"question:market-hhi:us-social-media-referral-traffic","toKind":"question","toLabel":"Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?","toHref":"/research/agenda/market-hhi--us-social-media-referral-traffic","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q42, Which entry, exit, share, switching, price, quality, or capacity evidence can explain the movement inside this exact market boundary?, is included by the exact domain or entity contract for Market Structure.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:market-structure:market-leader-share:us-browser-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"question:market-leader-share:us-browser-usage","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-leader-share--us-browser-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q33, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Market Structure.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:market-structure:market-leader-share:us-mobile-operating-system-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"question:market-leader-share:us-mobile-operating-system-usage","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-leader-share--us-mobile-operating-system-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q37, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Market Structure.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:market-structure:market-leader-share:us-search-engine-usage","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"question:market-leader-share:us-search-engine-usage","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-leader-share--us-search-engine-usage","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q40, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Market Structure.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."},{"id":"topic-question:market-structure:market-leader-share:us-social-media-referral-traffic","layer":"research","relationshipType":"topic_question","relationshipLabel":"Declared agenda membership","fromId":"topic:market-structure","fromKind":"topic","fromLabel":"Market Structure","fromHref":"/research/topics/market-structure","toId":"question:market-leader-share:us-social-media-referral-traffic","toKind":"question","toLabel":"Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?","toHref":"/research/agenda/market-leader-share--us-social-media-referral-traffic","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q43, Which participant-share changes account for the structural movement, and are the denominator and coverage stable across both anchors?, is included by the exact domain or entity contract for Market Structure.","sourceId":null,"sourceUrl":null,"confidenceLevel":"bounded","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A topic-to-question link records one exact institutional agenda membership; it does not rank urgency, importance, evidence strength, or imply a shared finding."}]}