Antitrust Radar
Market atlas

Definition-aware research lab

Market comparison studio

Compare concentration within each market's stated product, geography, and denominator. Disclosure gaps and differing confidence levels remain visible.

Profiles12Public market records
HHI anchors26Source-backed years
Selected2Shareable comparison

Comparable here

Within-profile time anchors, published screens, evidence counts, source posture, and each definition contract.

Never collapsed here

Different products, geographies, denominators, and metric families are never averaged into a synthetic finding.

Selection console

Choose two to four market profiles

Every selection updates this evidence workspace and its shareable URL while preserving each market-definition contract.

2/4 selected

Keep at least 2 profiles selected; add up to 4.

Market structure plane

Locate the selected markets in the public evidence universe

Horizontal position is latest published HHI. Vertical position shows either leading-firm share or CR4. Every point retains its own product boundary and denominator.

5 of 12 plotted
Universe12public profiles
Charted5Top firm + HHI
Selected on plane12 selected total
Outside plane7definitions or gaps
Top firm
Latest published HHI
Below 1,8001,800-2,500Above 2,500Selected comparison
Digital platforms 4Food and agriculture 1Health care 1Health insurance 1Real estate 1Software 1Telecommunications 2Transportation 1

Outside this coordinate system

7
17 linked public sources. Missing values are never assigned zero coordinates.Definition method

Latest public screens

Compare what each profile can support

Values are charted only when published and permitted for screening by the profile's market-definition contract.

Selected22 sectors
Metric families2Definitions retained
HHI published11 charted
Longitudinal1Profiles with 2+ HHI anchors
Public sources2Distinct selected sources

Latest HHI

Scale: 0 to 10,000

1/2 plotted

Outside the numerical comparison

Published-but-blocked and unavailable values stay visible without entering the chart.

1 profile

The chart is a side-by-side public screen, not a claim that these products share one relevant antitrust market or one interchangeable measurement basis.

Longitudinal anchors

Trace change inside each profile

Each history is indexed to its own first released HHI anchor, so direction and relative movement remain visible without placing unlike market levels on one shared HHI scale. Select any point to recover its exact published HHI and source.

1 trend-ready4 observed years
Selected public anchorSearch engines2026 / baseline 2023
Index
92.6
Published HHI
7,359
From baseline
-591
Estimated public / Medium confidenceBaseline HHI 7,950 in 2023StatCounter Global Stats
Search engines, 2023: index 100, published HHI 7,950, change 0Search engines, 2024: index 95.3, published HHI 7,575, change -375Search engines, 2025: index 95.5, published HHI 7,589, change -361Search engines, 2026: index 92.6, published HHI 7,359, change -591
Search engines2023-2026Decreasing

Definition matrix

Keep the denominator beside the number

Product boundary, geography, measurement basis, and exclusions determine what each concentration screen means.

Market definition method

Agency defined

Domestic airlines

Passenger shares · Not comparable

Product boundary
Domestic scheduled airline passenger traffic
Geography
United States domestic itineraries
Measurement
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
Inspect full contract

Public proxy

Search engines

Usage shares · Screen only

Product boundary
All-platform search engine usage
Geography
United States
Measurement
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
Inspect full contract

Evidence readiness

Compare the record behind each screen

Coverage counts are descriptive. Missing participant rows or HHI anchors remain research needs, not zeroes.

2 selected profiles
MarketLatestObservationsParticipant yearsSourcesPolicy eventsReportsStatusConfidence
Domestic airlines202611122IncompleteHigh
Search engines202644133Estimated publicMedium
Markets JSONLatest selected screensMarkets CSVComparison-ready tableDefinitions JSONBoundary contractsObservations JSONLongitudinal anchorsObservations CSVNotebook-ready historyPolicy events JSONSelected public docket