Long-form reports and research briefs

Our published research on market concentration and competition policy, free to read and reuse. Each report states its question, what the data can and cannot show, and where every number comes from.

Briefings: 11
Series: 4
Markets: 12
Immediate: 2

Report evidence desk

Briefings ranked for public use.

Evidence depth, market scope, publication readiness, and policy priority in one accountable record.

Open reports: 11
Source links: 37
Linked markets: 12
Immediate memos: 2

Flagship research

AR-SC-2026-01 / Current edition

Jul 19, 2026

The U.S. Competition Landscape

State of Competition 2026: five evidence systems, no single score

Central finding

Public evidence does not support a single national competition score.

A source-backed state-of-competition briefing across markets, industries, state systems, local banking screens, mergers, and enforcement, with every system kept in its own analytical universe.

Sources: 14
Markets: 8
Chapters: 7

National evidence atlasDefined markets / industry structure / geography / mergers / enforcement

Current editions

Latest research briefings

Open shelf

Research desk

Evidence first

Search briefings, inspect their source basis, and follow the route from public data to market profiles and policy asks.

Methods

Research cadence

Jul 2026

Latest briefing cycle in the public research library.

visible

sources

Latest briefings

JSON feed

reports

linked markets

source links

urgent memos

Research briefNear-term policy memo

State Individual Insurance Concentration, 2024

A source-backed research brief mapping the 2024 KFF state concentration cross-section for the ACA-regulated individual health insurance market, including HHI, leading-insurer share, rival depth, regional variation, and the public evidence needed for stronger competition analysis.

Open report

Publication readiness

Reusable with caveats

Checks whether this briefing can be cited, audited, exported, and routed into public action.

93%

6/7 ready

Citable releasereadyPublic date Jul 24, 2026

Public source basiscaution1 source link needs review

Market scopeready1 linked market

Evidence needs namedready5 next-step needs visible

Reusable data exportsreadyJSON, CSV, and source-ledger routes exposed

Public action routeready4 asks routed to advocacy

Method visiblereadyMethodology handoff included

View audit trail6/7 checks

Citable releasereadyPublic date Jul 24, 2026

Public source basiscaution1 source link needs review

Market scopeready1 linked market

Evidence needs namedready5 next-step needs visible

Reusable data exportsreadyJSON, CSV, and source-ledger routes exposed

Public action routeready4 asks routed to advocacy

Method visiblereadyMethodology handoff included

Policy audience

HHS, CMS, FTC, DOJ, Congress, state insurance regulators, state attorneys general, and competition researchers

Evidence needed next

State insurer identities, enrollment shares, and common controlStable plan, issuer, service-area, and jurisdiction identifiersAnnual entry, exit, merger, exchange, ownership, and revision historiesPremium, actuarial value, claims, denial, network, quality, and switching outcomes

Selected briefing

Jul 2026

date

Near-term

priority

source

market

Individual insurance

Policy thesis

Individual-insurance oversight should use the 2024 state concentration cross-section to prioritize disclosure and research, then connect structure to insurer identity, ownership, entry, plan design, networks, prices, quality, switching, and consumer outcomes before assigning cause or legal liability.

Public asks

Publish complete state insurer-share tables

Release insurer identities, enrollment shares, common-control links, denominator rules, suppression flags, and reproducible HHI calculations for every jurisdiction under stable identifiers.

Build a comparable annual market panel

Publish annual state vintages with plan entry, exit, mergers, service areas, exchange participation, ownership changes, revisions, and product-definition changes kept explicit.

Connect structure to public outcomes

Link stable state, insurer, and plan identifiers to premiums, actuarial value, claims, denials, network breadth, quality, enrollment, switching, complaints, and geographic access.

Source basis

KFF 2024 Individual Insurance Market Competition data for the 50 states and District of Columbia, including source-reported HHI, leading-insurer share, and the count of insurers with more than 5 percent of each jurisdiction's ACA-regulated individual market.

Individual insurance

Reader packet

Citable line

State Individual Insurance Concentration, 2024 (2026-07-24) links 1 source to 1 market (Individual insurance) and carries a near-term public-policy priority.

Briefing packetcite, audit, act Report JSON1 source ref Report CSVspreadsheet-ready Source ledgercited records only Data consolefilterable report rows Lead marketIndividual insurance Action briefmarket-scoped ask Methodologylimits and caveats

Research export

Notebook starter

const reportPacket = await fetch("/api/public/reports?report=state-individual-insurance-concentration-2024").then((response) => response.json());
const leadMarket = await fetch("/api/public/markets?market=us-aca-individual-health-insurance").then((response) => response.json());
const sourceTrail = await fetch("/api/public/sources?market=us-aca-individual-health-insurance").then((response) => response.json());

console.table(reportPacket.rows);
console.table(leadMarket.rows);
console.table(sourceTrail.rows);

Institutional publication record

Publication registry

Every public edition carries a stable series number, named author, version, revision note, and machine-readable citation. Superseded editions remain identifiable instead of silently changing in place.

Registry JSON

4Publication seriesdeclared editorial programs

11Current editions11 registered releases

3Citation formatscanonical, BibTeX, and RIS

Jul 24, 2026Registry updatedlatest edition date

Publication ID	Title and author	Series	Edition	Evidence	Cite and export
`AR-RB-2026-06`Current edition	Fixed Broadband Concentration Across Geographic Scales, 2020-2024Antitrust Radar Research Team	Competition Research BriefsResearch brief	Version 1.0Jul 24, 2026Initial public edition.	1 source1 market	BibTeX RIS
`AR-RB-2026-07`Current edition	State Individual Insurance Concentration, 2024Antitrust Radar Research Team	Competition Research BriefsResearch brief	Version 1.0Jul 24, 2026Initial public edition.	1 source1 market	BibTeX RIS
`AR-RB-2026-02`Current edition	Five Digital GatewaysAntitrust Radar Research Team	Competition Research BriefsResearch brief	Version 1.0Jul 20, 2026Initial public edition.	5 sources5 markets	BibTeX RIS
`AR-RB-2026-03`Current edition	State Banking Structure, 2015-2025Antitrust Radar Research Team	Competition Research BriefsResearch brief	Version 1.0Jul 20, 2026Initial public edition.	1 source0 markets	BibTeX RIS
`AR-RB-2026-04`Current edition	Business Dynamism Across U.S. Sectors, 1978-2023Antitrust Radar Research Team	Competition Research BriefsResearch brief	Version 1.0Jul 20, 2026Initial public edition.	2 sources0 markets	BibTeX RIS
`AR-RB-2026-05`Current edition	The Federal Merger Review Pipeline, 2016-2025Antitrust Radar Research Team	Competition Research BriefsResearch brief	Version 1.0Jul 20, 2026Initial public edition.	1 source0 markets	BibTeX RIS
`AR-RB-2026-01`Current edition	Beef Meatpacking Buyer PowerAntitrust Radar Research Team	Competition Research BriefsResearch brief	Version 1.0Jul 19, 2026Initial public edition.	3 sources1 market	BibTeX RIS
`AR-SC-2026-01`Current edition	The U.S. Competition LandscapeAntitrust Radar Research Team	State of CompetitionState of competition report	Version 1.0Jul 19, 2026Initial public edition.	14 sources8 markets	BibTeX RIS
`AR-DN-2026-02`Current edition	Housing Competition Needs Local Ownership DataAntitrust Radar Research Team	Public Data NotesData note	Version 1.0Jun 21, 2026Initial public edition.	4 sources1 market	BibTeX RIS
`AR-DN-2026-01`Current edition	Where Public Market-Share Data Runs OutAntitrust Radar Research Team	Public Data NotesData note	Version 1.0May 16, 2026Initial public edition.	2 sources2 markets	BibTeX RIS
`AR-MM-2026-01`Current edition	How HHI Helps Explain Market ConcentrationAntitrust Radar Research Team	Methods and MeasuresMethodology primer	Version 1.0May 16, 2026Initial public edition.	3 sources3 markets	BibTeX RIS