{"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":1,"edgeType":"all","edgeTypeMatched":true,"focus":"market:mkt-search","focusMatched":true,"kind":"all","kindMatched":true,"layer":"research","layerMatched":true,"query":"","view":"network"},"summary":{"nodeCount":5478,"edgeCount":19193,"sourceCount":45,"profileCount":5433,"nodeKindCount":13,"layerCount":4,"eligibleEdgeCount":547,"matchedNodeCount":7,"plottedEdgeCount":6,"plottedNodeCount":7,"hiddenNodeCount":0,"directNeighborCount":6},"focusNode":{"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. 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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,"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":112,"distance":1,"radius":11,"labelVisible":true},{"id":"report:rep-us-competition-landscape-2026","kind":"report","label":"The U.S. Competition Landscape","shortLabel":"The U.S. Competition La...","description":"A national briefing that aligns defined-market signals, industry structure, state and local geographic concentration screens, merger activity, and enforcement records without collapsing their different scopes.","href":"/reports/us-competition-landscape-2026","metricLabel":"Evidence sources","metricValue":"14","detail":"8 linked markets","status":"published","year":2026,"color":"#6366f1","searchText":"the u.s. competition landscape state of competition 2026: five evidence systems, no single score a national briefing that aligns defined-market signals, industry structure, state and local geographic concentration screens, merger activity, and enforcement records without collapsing their different scopes. a source-backed state-of-competition briefing across markets, industries, state systems, local banking screens, mergers, and enforcement, with every system kept in its own analytical universe. 2022 and 2017 u.s. economic census industry concentration tables, usda ers historical meatpacking cr4, kff 2024 state individual-market hhi, fdic 2025 statewide and county summary of deposits screens, the fy2025 ftc/doj hsr report, and source-backed market and enforcement records.","connectionCount":26,"x":578.172,"y":186,"distance":1,"radius":11,"labelVisible":true},{"id":"report:insight-market-change-field","kind":"report","label":"Latest market-structure signals moved in both directions.","shortLabel":"Market change field","description":"Fifteen HHI, CR4, and leading-share comparisons preserve their own product boundary, denominator, source, and observed interval. The direction count is an inventory, not a vote about competition. HHI points, CR4 points, and leading-share points across different products and periods are not pooled or ranked.","href":"/insights/market-structure-change-field","metricLabel":"Exact signals","metricValue":"15","detail":"AR-CI-2026-01 / Domain readout","status":"current insight","year":2026,"color":"#6366f1","searchText":"latest market-structure signals moved in both directions. market change field fifteen hhi, cr4, and leading-share comparisons preserve their own product boundary, denominator, source, and observed interval. defined markets domain readout ar-ci-2026-01 the current market field is split. across 15 exact latest-to-prior rows, 8 increased, 7 decreased. the count says only how many bounded comparisons point each way. digital usage screens diverged. social referrals moved from 3,804 in 2025 to 4,995 in 2026 (+1,191.0 hhi points). search engines moved from 7,589 in 2025 to 7,359 in 2026 (-230.0 hhi points). mobile operating systems moved from 5,094 in 2025 to 5,337 in 2026 (+243.0 hhi points). browsers moved from 3,720 in 2025 to 3,612 in 2026 (-108.0 hhi points). each usage system has a separate denominator and remains analytically independent. other market intervals use different clocks. beef meatpacking moved from 81.0% in 1995 to 85.0% in 2019 (+4.00 percentage points). fixed broadband moved from 1,195 in 2023 to 1,501 in 2024 (+306.0 hhi points). wireless service moved from 3,596 in 2021 to 3,550 in 2023 (-46.0 hhi points). their unequal intervals are displayed, not annualized. beef meatpacking four-participant concentration ratio browsers four-participant concentration ratio browsers herfindahl-hirschman index browsers leading-participant share fixed broadband herfindahl-hirschman index 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 wireless service herfindahl-hirschman index u.s. steer and heifer purchases by beef packers u.s. browser usage u.s. residential fixed broadband access u.s. mobile operating-system web usage u.s. search engine usage u.s. social-media referral traffic u.s. mobile wireless service","connectionCount":15,"x":578.172,"y":334,"distance":1,"radius":11,"labelVisible":true},{"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":450,"y":408,"distance":1,"radius":11,"labelVisible":true},{"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":321.828,"y":334,"distance":1,"radius":11,"labelVisible":true},{"id":"report:rep-hhi-primer","kind":"report","label":"How HHI Helps Explain Market Concentration","shortLabel":"How HHI Helps Explain M...","description":"An open explainer on HHI, CR4, effective number of firms, and why source coverage matters.","href":"/reports/hhi-primer","metricLabel":"Evidence sources","metricValue":"3","detail":"3 linked markets","status":"published","year":2026,"color":"#6366f1","searchText":"how hhi helps explain market concentration a public primer for reading concentration dashboards an open explainer on hhi, cr4, effective number of firms, and why source coverage matters. a short public-interest guide to reading descriptive concentration metrics. fcc source-reported hhi and statcounter public usage-share tables.","connectionCount":8,"x":321.828,"y":186,"distance":1,"radius":11,"labelVisible":true}],"rows":[{"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; 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