Public competition desk

U.S. competition observatory

A one-page view of concentration across markets, where the evidence is missing, and which firms are connected. Use the underlying sources to investigate questions, not to infer a legal violation from a score.

12 markets45 sources4 HHI gaps

Observatory indexChoose the evidence universe

4 public domains

Research desk

Map concentration to public action

Position markets by HHI, sector, evidence depth, and the public-action questions they raise.

12in view0filters17sources

Refine market sliceSector, geography, concentration, vintage, status, and confidenceAll markets12 in view

Market power decision map

Which markets need public action first?

HHI sets position; sectors set rows; sourced years set size; status marks action priority. Select a market to open its packet.

12Markets8Sectors11Queue

Map lens

All signals lens: 12/12 visible

Search engines stays in this analytical layer; the map keeps its route, source packet, and public ask attached.

SelectedSearch enginesin scope, rank #1Visible12/12 visibleAll signalsMuted0 mutedoutside layer

Open selected handoff12 links, 11 action signals

Question answeredWhich markets are in the current observatory slice?Layer answer12 markets, 12 sector memberships, 11 action signalsNext actionPick a row, then open the scoped packet.

Nodes 12Memberships 12Action 11

Node sizeSourced HHI anchor years (0-5)Node colorMarket sectorStatus dotConcern or data gapMuted nodesOutside active layerSector spokeObserved market membershipRouteSelected evidence to public ask

Public policy agenda

11 actionable · 11 markets need review, monitoring, or disclosure before the public can call them fair.

Route dossier

High-concern screen

Public ask: Review market power, defaults, contracts, and switching barriers.

Market definition

Digital platforms

United States

Evidence strength

1 source

medium confidence

Public posture

Estimated public

HHI 7,359

Concern intensity

98%

source-backed
screen

Intensity is derived from HHI when available; disclosure gaps are held in the action queue until firm-level shares are public.

Analysis canvas

All signals · 12 markets across 8 sectors · farther right means higher HHI · selected market: Search engines

Position HHISize HHI yearsColor sectorDot concern

No ownership, control, supply, or conduct claimOpen packet

ClaimHigh concentrationHHI 7,359; 85.2% top firm Evidence1 sourceEstimated public / medium confidence Public askHigh-concern screenReview market power, defaults, contracts, and switching barriers.Reuse packetProfile + APIsame market row, sources, JSON, CSV, comparison, and notebook route

Selected market route

Search engines: High-concern screen

Review market power, defaults, contracts, and switching barriers.

Layer rank#1of 12 all signals rowsHHI screen7,3594,859 above high-concern lineEvidence1 sourceEstimated public / medium confidencePublic actionReviewAgency review route

1. Digital platforms2. Search engines3. Action

HHI position

All signals

7 ranked markets

Ordered by public-action priority, then concentration. Tap a band to carry that market into the evidence packet.

Layer data table

All signals rows sorted by action priority, HHI, and source coverage.

7 shown

HHI	Evidence	Public route
7,359Top firm 85.2%	1 sourceEstimated public	High concentration
5,337Top firm 63.1%	1 sourceEstimated public	High concentration
4,995Top firm 68.9%	1 sourceEstimated public	High concentration
4,804Top firm 67.1%	1 sourceEstimated public	High concentration
3,650Top firm N/A	1 sourceEstimated public	High concentration
3,612Top firm 50.0%	1 sourceEstimated public	High concentration
3,550Top firm N/A	1 sourceVerified	High concentration

Selected market

Search engines

Digital platforms / United States / 2026

High concentration

7,359

HHI

85.2%

Top firm

99.4%

CR4

Sources

Open profile

Research handoffSearch engines research handoff3 route steps · citation and notebook snippets

Search engines routes from Digital platforms to high concentration with 1 source and HHI 7,359.

ClaimHigh concentrationHHI 7,359; top firm 85.2%Evidence1 sourceEstimated public / medium confidence AskHigh-concern screenReview market power, defaults, contracts, and switching barriers.

JSON packet Data console Action ask

JSON CSV

Selected network packet ready for citation, API reuse, and notebook seeding.

Reusable evidence packet7 handoff routesProfile, sources, JSON, CSV, comparison, and action paths

Move this selected node across the observatory: full profile, source rows, machine-readable data, comparison lens, and public-action route stay attached to the same market.

Profilefull market dossier Source rows1 linked source Market JSONmachine-readable row Data consolescoped API workbench Action briefturn signal into ask CSV rowspreadsheet row Compareranking lens

Public action queue3 priority routesHighest concern markets in this slice

Sector clusters8 sectorsJump to a comparable market family

Digital platformsAvg HHI 5,6244 SoftwareAvg HHI 3,6121 TelecommunicationsAvg HHI 2,5262 TransportationHHI pending1 Health careHHI pending1 Real estateHHI pending1 Food and agricultureHHI pending1 Health insuranceAvg HHI 3,6501

Public interest triage

Where government should look next

Concentrated markets can turn everyday essentials into private chokepoints. This queue converts concentration screens into public action: publish missing data, investigate roll-ups, and test remedies.

Queue order uses the review category, latest sourced HHI, and visible trigger count. It does not estimate consumer harm or establish legal liability.

Immediate

Near-term

Data gaps

Agency-ready

Open advocacy agenda Audit sources

#1Immediate reviewHHI 7,359
Search engines
Digital platforms · United States · medium confidence · estimated public
3
exact flags
Review basis
HHI 7,359 (>= 2,500)85.2% top firm (>= 35%)99.4% CR4 (>= 60%)
Public action
Test whether the dominant firm controls access, switching, pricing, defaults, distribution, or other chokepoints that weaken consumer choice.
Evidence needed
Agency-ready source trail and market-definition caveats
#2Immediate reviewHHI 5,337
Mobile operating systems
Digital platforms · United States · medium confidence · estimated public
4
exact flags
Review basis
HHI 5,337 (>= 2,500)63.1% top firm (>= 35%)100.0% CR4 (>= 60%)HHI trend increasing
Public action
Test whether the dominant firm controls access, switching, pricing, defaults, distribution, or other chokepoints that weaken consumer choice.
Evidence needed
Agency-ready source trail and market-definition caveats
#3Immediate reviewHHI 4,995
Social referrals
Digital platforms · United States · medium confidence · estimated public
4
exact flags
Review basis
HHI 4,995 (>= 2,500)68.9% top firm (>= 35%)94.4% CR4 (>= 60%)HHI trend increasing
Public action
Test whether the dominant firm controls access, switching, pricing, defaults, distribution, or other chokepoints that weaken consumer choice.
Evidence needed
Agency-ready source trail and market-definition caveats
#4Immediate reviewHHI 4,804
AI assistants
Digital platforms · United States · medium confidence · estimated public
3
exact flags
Review basis
HHI 4,804 (>= 2,500)67.1% top firm (>= 35%)94.8% CR4 (>= 60%)
Public action
Test whether the dominant firm controls access, switching, pricing, defaults, distribution, or other chokepoints that weaken consumer choice.
Evidence needed
Comparable multi-year observations

Map concentration to public action

Which markets need public action first?

Search engines

Where government should look next

Search engines

Mobile operating systems

Social referrals

AI assistants

Which markets need public action first?

Search engines