Research notes documenting what current public records can establish, what remains withheld, and which disclosures would make competition analysis more accountable.
AR-DN / permanent publication series
Data note
Public Data Notes
Research notes documenting what current public records can establish, what remains withheld, and which disclosures would make competition analysis more accountable. Cell = one permanent editionFill follows evidence-unit count within this series
- Current editions
- 2
- 1 publication year
- Research themes
- 2
- declared memberships
- Geographies
- 1
- 1 research scope
- Source links
- 6
- reviewed through Jun 21, 2026
Series contract. A documented data gap is not evidence that a market is competitive or uncompetitive. Missing firm shares, ownership links, or local boundaries remain explicit.
Evidence standardInstitutional mandate
What this collection is for.
A documented data gap is not evidence that a market is competitive or uncompetitive. Missing firm shares, ownership links, or local boundaries remain explicit.
- Primary audience
- Agencies, legislatures, researchers, advocates, and data publishers
- Output
- Data note
- First edition
- May 16, 2026
- Latest edition
- Jun 21, 2026
Coverage profile
Themes, scopes, and evidence volume
Declared themes
- Places and local markets150% of series editions
- Methods and public data2100% of series editions
Research scopes
- U.S. domestic research2100% of editions
- Evidence units
- 6
- Source links
- 6
- Current editions
- 2
- Source clock
- Jun 21, 2026
Edition register
2 citable editions
- AR-DN-2026-01Version 1.0
Data note / United States
Where Public Market-Share Data Runs Out
A transparency note on incomplete data and why the observatory never fills gaps with invented shares.- Methods and public data
- Published
- May 16, 2026
- Sources reviewed
- May 16, 2026
- Evidence
- 2 cited sources
- Source links
- 2
- AR-DN-2026-02Version 1.0
Data note / United States
Housing Competition Needs Local Ownership Data
Explains why the housing profile reports public stress signals while withholding HHI pending local firm-level ownership and rental market-share data.- Places and local markets
- Methods and public data
- Published
- Jun 21, 2026
- Sources reviewed
- Jun 21, 2026
- Evidence
- 4 cited sources
- Source links
- 4
Series relationship register
Exact overlap with the other five collections
| Series | Shared themes | Shared scope | Same format | Route |
|---|---|---|---|---|
| Competition Research Briefs | Places | us-domestic | Yes | Compare |
| Methods and Measures | Methods | us-domestic | Yes | Compare |
| State of Competition | Places | us-domestic | Yes | Compare |
| Competition Insights | Places | us-domestic | No | Compare |
| International Competition Policy Evidence Briefs | 0 / no declared overlap | 0 / separate scope | No | Compare |
Theme overlap describes exact shared taxonomy memberships only. It does not establish shared findings, methods, quality, or policy implications.
Collection citation
Open edition citations Antitrust Radar. (2026). Public Data Notes [Publication series]. Antitrust Radar.