{"license":"https://creativecommons.org/licenses/by/4.0/","dataset":"definitions","count":2,"filters":{"markets":["us-airline-domestic-passengers","us-search-engine-usage"],"marketsMatched":true,"matchedMarketCount":2,"matchedMarketSlugs":["us-airline-domestic-passengers","us-search-engine-usage"],"unmatchedMarkets":[]},"rows":[{"id":"def-airlines","marketId":"mkt-airlines","productBoundary":"Domestic scheduled airline passenger traffic","geographicBoundary":"United States domestic itineraries","measurementBasis":"Carrier share of domestic scheduled passengers","denominator":"Passengers reported in the BTS domestic market-share table for the 12 months ending February 2026","included":"Named carriers and the published aggregate Other category","excluded":"Individual carriers inside Other are not separately identified","metricFamily":"passenger_shares","definitionStatus":"agency_defined","crossMarketUse":"not_comparable","timeSeriesUse":"snapshot_only","sourceId":"bts-transtats-2026","dataYear":2026,"confidenceLevel":"high","methodologyNote":"Use sourced carrier passenger shares for top-firm and CR4 screens; withhold HHI while Other remains aggregated.","limitations":"The aggregate Other row prevents a complete firm-level distribution and therefore prevents a publishable HHI.","marketSlug":"us-airline-domestic-passengers","marketName":"U.S. domestic airline passengers","marketShortName":"Domestic airlines","sector":"Transportation","geography":"United States","marketNaicsCode":"481111","industryHref":"/industries/481111","crosswalkHref":"/markets/economy?bridgeMarket=us-airline-domestic-passengers&bridgeNaics=481111#market-industry-crosswalk","sourceTitle":"TranStats airline domestic market share March 2025-February 2026","sourcePublisher":"Bureau of Transportation Statistics","sourceUrl":"https://transtats.bts.gov/Homepage.asp","sourceAccessDate":"2026-05-16","sourceProfileHref":"/sources/bts-transtats-2026"},{"id":"def-search","marketId":"mkt-search","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","metricFamily":"usage_shares","definitionStatus":"public_proxy","crossMarketUse":"screen_only","timeSeriesUse":"comparable_anchors","sourceId":"statcounter-search-us-2026","dataYear":2026,"confidenceLevel":"medium","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.","marketSlug":"us-search-engine-usage","marketName":"U.S. search engine usage","marketShortName":"Search engines","sector":"Digital platforms","geography":"United States","marketNaicsCode":"518210","industryHref":"/industries/518210","crosswalkHref":"/markets/economy?bridgeMarket=us-search-engine-usage&bridgeNaics=518210#market-industry-crosswalk","sourceTitle":"Search engine market share in United States of America, April 2023-April 2026","sourcePublisher":"StatCounter Global Stats","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","sourceAccessDate":"2026-07-17","sourceProfileHref":"/sources/statcounter-search-us-2026"}]}