{"schemaVersion":1,"scenario":{"href":"/mergers/screen?market=us-search-engine-usage&year=2026&a=bing&b=yahoo-search","market":{"id":"mkt-search","slug":"us-search-engine-usage","name":"U.S. search engine usage","sector":"Digital platforms","geography":"United States","profileHref":"/markets/us-search-engine-usage"},"year":2026,"partyA":{"id":"cmp-bing","slug":"bing","name":"Bing","sharePercent":9.82,"sourceId":"statcounter-search-us-2026"},"partyB":{"id":"cmp-yahoo-search","slug":"yahoo-search","name":"Yahoo Search","sharePercent":2.67,"sourceId":"statcounter-search-us-2026"},"metrics":{"baselineHhi":7359,"deltaHhi":52.44,"postMergerHhi":7411.44,"mergedSharePercent":12.49,"partyASharePercent":9.82,"partyBSharePercent":2.67},"screen":{"evidenceClass":"complete_hhi","hhiPathCrossed":false,"mergedSharePathCrossed":false,"outcome":"numeric_condition_not_crossed","label":"Numeric condition not crossed","detail":"The selected shares do not cross either published Guideline 1 numeric path on these inputs."},"equation":"2 x 9.82% x 2.67% = 52.44 HHI points","citation":"Antitrust Radar, Merger Structure Lab: Bing + Yahoo Search in U.S. search engine usage (2026); observed shares 9.82% and 2.67%; ΔHHI 52.44; post-merger HHI 7411.44."},"thresholds":{"highlyConcentratedHhi":1800,"mergedFirmSharePercent":30,"significantDeltaHhi":100},"definition":{"productBoundary":"All-platform search engine usage","geographicBoundary":"United States","measurementBasis":"StatCounter search engine referral usage share","denominator":"Observed U.S. search engine usage in each reported monthly snapshot","included":"Named search engines and a residual Other category that closes the public share table to 100 percent","excluded":"Search query volume, search advertising revenue, and other digital advertising activity","definitionStatus":"public_proxy","methodologyNote":"Compute HHI from the same StatCounter all-platform U.S. usage-share series and retain the residual Other category.","limitations":"Usage share is a web-analytics proxy and should not be presented as search-query share or search-advertising revenue share.","sourceId":"statcounter-search-us-2026"},"evidence":{"namedShareCoveragePercent":99.88,"totalShareCoveragePercent":100,"baselineDataStatus":"estimated_public","baselineConfidenceLevel":"medium","baselineCalculationMethod":"computed_from_public_shares_with_residual_other","sources":[{"id":"statcounter-search-us-2026","title":"Search engine market share in United States of America, April 2023-April 2026","publisher":"StatCounter Global Stats","url":"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","profileHref":"/sources/statcounter-search-us-2026"}]},"guidelines":{"title":"2023 Merger Guidelines, Guideline 1","publisher":"U.S. Department of Justice and Federal Trade Commission","url":"https://www.justice.gov/atr/merger-guidelines/applying-merger-guidelines/guideline-1","issued":"December 18, 2023"},"guardrails":["This tool combines two observed shares as a research scenario. It does not report an actual transaction, define a legal market, or predict an agency or court outcome.","The calculation inherits the published public proxy boundary, United States, measurement basis, denominator, and source limitations shown below.","The post-merger HHI adds the exact share-based delta to the published, rounded baseline HHI; small rounding differences can remain.","Guideline 1 concentration arithmetic is one screening framework. The Merger Guidelines identify additional fact-specific theories, evidence, and rebuttal considerations."]}