{"license":"https://creativecommons.org/licenses/by/4.0/","dataset":"atlas","mode":"workspace","updatedThrough":"2026-08-15","citation":"Antitrust Radar, Atlas Research Workspace: Four digital usage systems traced four different structural paths.; U.S. browser usage (2026-08-15); 2 canonical profiles and 1 declared supporting edges.","guardrail":"The workspace assembles canonical profiles and declared Atlas edges for research navigation. A direct edge preserves only its encoded evidence statement. A multi-hop route does not establish a direct endpoint relationship, make unlike measures comparable, define a legal market, assign ownership, control, liability, or causation, or prove a policy effect.","filters":{"duplicateItems":[],"items":["report:insight-digital-gateways-change","market:mkt-browser"],"itemsMatched":true,"requestedItems":["report:insight-digital-gateways-change","market:mkt-browser"],"truncated":false,"unmatchedItems":[],"layer":"all","layerMatched":true,"view":"map"},"diagnostics":{"bridgeDependenceRate":0,"confidenceCounts":{"bounded":1,"high":0,"low":0,"medium":0},"connectedPairRate":1,"directPairRate":1,"layerCounts":[{"count":0,"layer":"measurement"},{"count":0,"layer":"organization"},{"count":0,"layer":"enforcement"},{"count":1,"layer":"research"}],"sourceBearingEdgeCount":0,"sourceCoverageRate":0,"transitNodes":[]},"summary":{"bridgedPairCount":0,"connectedPairCount":1,"connectorNodeCount":0,"directPairCount":1,"disconnectedPairCount":0,"layerCount":1,"ledgerEdgeCount":1,"nodeKindCount":2,"pairCount":1,"selectedNodeCount":2,"sourceCount":0},"selectedNodes":[{"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},{"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}],"connectorNodes":[],"pairs":[{"id":"report:insight-digital-gateways-change--market:mkt-browser","leftId":"report:insight-digital-gateways-change","leftLabel":"Four digital usage systems traced four different structural paths.","rightId":"market:mkt-browser","rightLabel":"U.S. browser usage","status":"direct","directEdgeCount":1,"shortestHopCount":1,"alternativeShortestPathCount":0,"primaryPathNodeIds":["report:insight-digital-gateways-change","market:mkt-browser"],"primaryPathEdgeIds":["report-market:insight-digital-gateways-change:mkt-browser"]}],"sources":[],"rows":[{"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."}]}