Data infrastructure / open access
Public data catalog
Download the records behind the research, including market shares, concentration measures, official events, and source references. Coverage and missing values are documented for each dataset.
Source records move through market definitions, concentration calculations, confidence labels, and public data endpoints — 45 source records, 12 market profiles, 235808 record rows plus a 1 row summary endpoint across 62 API endpoints.
Record rows
235,808
Sources
45
Endpoints
62
Aug 15, 2026
Latest source review
62
Dataset families
4
Source types
Market-definition atlas
What market is this metric measuring?
Inspect each product boundary, geography, denominator, proxy choice, and permitted comparison use before treating concentration values as economic evidence.
Selected definition contract
U.S. rental housing access
Product boundary
Rental housing access with affordability, supply, and selected institutional single-family rental ownership evidence
Geographic boundary
National affordability and supply indicators plus selected local ownership evidence
Measurement basis
Mixed public indicators rather than one firm-share distribution
Denominator
The relevant population or housing stock differs by source and is not combined into a single market denominator
Included
Cost-burdened renter households, housing supply shortfall evidence, and selected local ownership findings
Excluded
Comparable firm-level shares for consistently defined local rental markets
Method and limitations
Keep national access indicators separate from local competition evidence and do not compute a national rental housing HHI.
Rental housing competition is local, while the current public records use different populations, geographies, and units of analysis.
Boundary source
America's Rental Housing 2026
Harvard Joint Center for Housing Studies · accessed 2026-06-21
Open data needs public interpretation.
The API is a starting point, not a legal conclusion. Pair downloads with methodology notes, source records, and the data-gaps report when citing market concentration.