{"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":"report:insight-digital-gateways-change","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":84,"plottedEdgeCount":130,"plottedNodeCount":48,"hiddenNodeCount":36,"directNeighborCount":10},"focusNode":{"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},"nodes":[{"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. 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four digital usage systems traced four different structural paths.","connectionCount":15,"x":450,"y":408,"distance":1,"radius":11,"labelVisible":true},{"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. 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public_dataset","connectionCount":7,"x":363.008,"y":140.265,"distance":1,"radius":11,"labelVisible":true},{"id":"participant:cmp-android","kind":"participant","label":"Android","shortLabel":"Android","description":"Mobile operating-system category reported by StatCounter.","href":"/participants/android","metricLabel":"Latest sourced share","metricValue":"36.9%","detail":"1 market / 4 rows","status":"estimated_public","year":2026,"color":"#3b82f6","searchText":"android mobile operating-system category reported by statcounter. u.s. mobile operating-system web usage","connectionCount":2,"x":468.874,"y":50.85,"distance":2,"radius":8,"labelVisible":false},{"id":"participant:cmp-bing","kind":"participant","label":"Bing","shortLabel":"Bing","description":"Search engine participant reported by StatCounter.","href":"/participants/bing","metricLabel":"Latest sourced share","metricValue":"9.8%","detail":"1 market / 4 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publis...","description":"2022 Economic Census employer-firm concentration screen for NAICS 513210.","href":"/industries/513210","metricLabel":"Revenue HHI","metricValue":"D","detail":"16.8K firms / 492.9B revenue","status":"disclosure withheld","year":2022,"color":"#f59e0b","searchText":"513210 software publishers 51","connectionCount":5,"x":620.425,"y":137.3,"distance":2,"radius":8,"labelVisible":false},{"id":"industry:519290","kind":"industry","label":"Web search portals and all other information services","shortLabel":"519290 Web search port...","description":"2022 Economic Census employer-firm concentration screen for NAICS 519290.","href":"/industries/519290","metricLabel":"Revenue HHI","metricValue":"D","detail":"1K firms / 144.3B revenue","status":"disclosure withheld","year":2022,"color":"#f59e0b","searchText":"519290 web search portals and all other information services 51","connectionCount":4,"x":648.09,"y":190.285,"distance":2,"radius":8,"labelVisible":false},{"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":659.707,"y":248.917,"distance":2,"radius":8,"labelVisible":false},{"id":"issue:communications-infrastructure","kind":"issue","label":"Communications infrastructure","shortLabel":"Communications","description":"Where do local communications concentration, network access, switching, and investment constrain rivalry across separately measured wireless and fixed systems?","href":"/issues/communications-infrastructure","metricLabel":"Bounded markets","metricValue":"2","detail":"2 separately defined markets / editorial research program","status":"issue program","year":2024,"color":"#c026d3","searchText":"communications infrastructure communications wireless, fixed access, geography, and entry the program connects two separately bounded fcc concentration systems: mobile wireless hhi weighted across economic areas and fixed-broadband hhi reported nationally and as state, county, and census-tract medians. where do local communications concentration, network access, switching, and investment constrain rivalry across separately measured wireless and fixed systems? how does concentration vary across economic areas, states, counties, census tracts, service tiers, and consumer segments behind the published summaries? which provider-level shares, spectrum, wholesale access, switching, deployment, price, quality, and network-investment records explain entry conditions over time? what evidence distinguishes merger remedies, deployment programs, and regulatory changes from durable competitive outcomes? u.s. mobile wireless service wireless service telecommunications u.s. residential fixed broadband access fixed broadband telecommunications","connectionCount":4,"x":654.335,"y":308.448,"distance":2,"radius":8,"labelVisible":false},{"id":"issue:food-buyer-power","kind":"issue","label":"Food systems and buyer power","shortLabel":"Food buyer power","description":"How does buyer concentration in regional cattle procurement affect producer options, contract terms, and supply-chain resilience?","href":"/issues/food-systems-and-buyer-power","metricLabel":"Bounded markets","metricValue":"1","detail":"1 separately defined market / editorial research program","status":"issue program","year":2019,"color":"#c026d3","searchText":"food systems and buyer power food buyer power procurement options, regional boundaries, and resilience the program follows the usda national beef-packer cr4 series into a buyer-power research frame while preserving the need for regional procurement markets and firm-level evidence. how does buyer concentration in regional cattle procurement affect producer options, contract terms, and supply-chain resilience? which plant-level purchases, procurement distances, capacity, contracts, and prices define regional buyer alternatives? how do entry, exit, outages, captive supply, and transportation costs change producer bargaining options? which firm-level records can disaggregate the national cr4 without inferring equal shares among the four largest buyers? u.s. steer and heifer purchases by beef packers beef meatpacking food and agriculture","connectionCount":4,"x":632.409,"y":364.053,"distance":2,"radius":8,"labelVisible":false},{"id":"issue:health-care-intermediaries","kind":"issue","label":"Health care intermediaries","shortLabel":"Health intermediaries","description":"How do insurer structure, PBM contracting, rebate, formulary, network, and organizational relationships affect competition and patient access across separately measured health-care systems?","href":"/issues/health-care-intermediaries","metricLabel":"Bounded markets","metricValue":"2","detail":"2 separately defined markets / editorial research program","status":"issue program","year":2024,"color":"#c026d3","searchText":"health care intermediaries health intermediaries insurance, pbm contracting, access, and public-data gaps the program connects the 2024 kff state individual-insurance concentration cross-section to separately bounded public pbm facts, named official records, source limits, and evidence requests without treating payer and prescription-intermediary systems as one market. how do insurer structure, pbm contracting, rebate, formulary, network, and organizational relationships affect competition and patient access across separately measured health-care systems? which comparable state insurer enrollment, claims, prescription, rebate, and network records can establish firm-level structure under stable ownership identifiers? how do plan entry, insurer structure, contracting, formulary, and network practices differ across payer, pharmacy, patient, and geographic segments? which ownership and control relationships are supported by exact filings rather than name similarity or market context? u.s. pharmacy benefit management pbms health care u.s. aca individual health insurance individual insurance health insurance","connectionCount":4,"x":595.705,"y":411.229,"distance":2,"radius":8,"labelVisible":false},{"id":"issue:housing-access","kind":"issue","label":"Housing access and local power","shortLabel":"Housing access","description":"Which local ownership, pricing, supply, and platform records can identify where renters face weakened competitive choice?","href":"/issues/housing-access-and-local-power","metricLabel":"Bounded markets","metricValue":"1","detail":"1 separately defined market / editorial research program","status":"issue program","year":2026,"color":"#c026d3","searchText":"housing access and local power housing access ownership, pricing systems, supply, and place the program joins national housing-access evidence to selected ownership and official-record context while keeping the underlying competition problem local. which local ownership, pricing, supply, and platform records can identify where renters face weakened competitive choice? where can parcel, owner, property-manager, rent, vacancy, and transaction data be joined at a stable local geography? how should pricing-software use, information exchange, ownership concentration, and supply constraints be measured separately? which local comparisons can test entry, rent, quality, and displacement outcomes without treating co-movement as causation? u.s. rental housing access rental housing real estate","connectionCount":4,"x":547.197,"y":446.153,"distance":2,"radius":8,"labelVisible":false},{"id":"issue:transportation-networks","kind":"issue","label":"Transportation networks","shortLabel":"Transportation","description":"How do route-level entry, capacity, airport constraints, and consolidation shape passenger choice beyond national shares?","href":"/issues/transportation-networks","metricLabel":"Bounded markets","metricValue":"1","detail":"1 separately defined market / editorial research program","status":"issue program","year":2026,"color":"#c026d3","searchText":"transportation networks transportation routes, airport access, capacity, and consolidation the program places national airline passenger-share reporting beside route-level research needs and official merger and competition records. how do route-level entry, capacity, airport constraints, and consolidation shape passenger choice beyond national shares? which route-pair, airport, schedule, fare, capacity, and entry records define competitive alternatives for travelers? how do slot, gate, loyalty, and network constraints differ across airports and traveler segments? which before-and-after records can evaluate transactions or remedies without attributing every observed change to one event? u.s. domestic airline passengers domestic airlines transportation","connectionCount":4,"x":490.814,"y":465.996,"distance":2,"radius":8,"labelVisible":false},{"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). 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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":431.126,"y":469.15,"distance":2,"radius":8,"labelVisible":false},{"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). 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subnational median hhi, and the public evidence needed to move from geographic screens to mechanisms and outcomes. a four-scale fcc concentration history showing why a rising national hhi and falling subnational medians must be read together without converting them into one market. federal communications commission internet access services figure 5, covering nine semiannual reporting periods from december 2020 through december 2024 for residential fixed connections meeting the 100/20 mbps threshold. the packet preserves the national hhi and medians of separately calculated state, county, and census-tract hhis as distinct geographic summaries.","connectionCount":4,"x":231.175,"y":166.407,"distance":2,"radius":8,"labelVisible":false},{"id":"report:rep-state-individual-insurance","kind":"report","label":"State Individual Insurance Concentration, 2024","shortLabel":"State Individual Insura...","description":"A source-backed research brief mapping the 2024 KFF state concentration 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2024 individual insurance market competition data for the 50 states and district of columbia, including source-reported hhi, leading-insurer share, and the count of insurers with more than 5 percent of each jurisdiction's aca-regulated individual market.","connectionCount":4,"x":288.161,"y":85.495,"distance":2,"radius":8,"labelVisible":false},{"id":"report:rep-state-banking-structure","kind":"report","label":"State Banking Structure, 2015-2025","shortLabel":"State Banking Structure...","description":"A source-backed research brief on eleven annual FDIC statewide branch-deposit screens, the changing geography beneath stable national aggregates, and the limits of statewide concentration measures.","href":"/reports/state-banking-structure-2015-2025","metricLabel":"Evidence sources","metricValue":"1","detail":"0 linked markets","status":"published","year":2026,"color":"#6366f1","searchText":"state banking structure, 2015-2025 stable national concentration can coexist with large state-level shifts a source-backed research brief on eleven annual fdic statewide branch-deposit screens, the changing geography beneath stable national aggregates, and the limits of statewide concentration measures. shows how a nearly unchanged national hhi can coexist with large state-level movements, classification turnover, and declining branch and organization counts. fdic annual summary of deposits branch records for 2015-2025, independently grouped to the reported top bank holding company when available and otherwise to the insured institution.","connectionCount":3,"x":373.13,"y":34.756,"distance":2,"radius":8,"labelVisible":false}],"rows":[{"id":"policy-scope:evt-google-search-complaint-2020:mkt-browser","layer":"enforcement","relationshipType":"policy_scope","relationshipLabel":"Related policy context","fromId":"market:mkt-browser","fromKind":"market","fromLabel":"U.S. browser 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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-mobile-wireless-service","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-wireless-service","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-wireless-service","evidenceLabel":"Research topic agenda contract","evidenceDetail":"Q44, 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; 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