policyengine/microcosm-us-sources
Microcosm US build sources Processed Current Population Survey Annual Social and Economic Supplement (CPS ASEC) files that the PolicyEngine Microcosm US build reads as inputs to its base stage (tools/build_us_puf_support_base.py --asec-h5 YEAR=PATH in PolicyEngine/microcosm). They are mirrored here unchanged so that the build's inputs do not exist on one machine only. Microcosm pins each file by repository revision, SHA-256 and size, and refuses a file whose digest differs.… See the full description on the dataset page: https://huggingface.co/datasets/policyengine/microcosm-us-sources.
Microcosm US build sources
Processed Current Population Survey Annual Social and Economic Supplement (CPS ASEC) files that the PolicyEngine Microcosm US build reads as inputs to its base stage (tools/build_us_puf_support_base.py --asec-h5 YEAR=PATH in PolicyEngine/microcosm).
They are mirrored here unchanged so that the build's inputs do not exist on one machine only. Microcosm pins each file by repository revision, SHA-256 and size, and refuses a file whose digest differs.
Files
Household and person counts are the ones the Microcosm base stage recorded when it read these exact bytes on 16 September 2026.
Provenance
Each file is an HDF5 store of the person, family and household tables of the Census Bureau's public-use CPS ASEC release for that year:
- 2024:
https://www2.census.gov/programs-surveys/cps/datasets/2025/march/asecpub25csv.zip - 2023:
https://www2.census.gov/programs-surveys/cps/datasets/2024/march/asecpub24csv.zip - 2022:
https://www2.census.gov/programs-surveys/cps/datasets/2023/march/asecpub23csv.zip
They were produced by PolicyEngine's retired US data package's Census CPS loader. The exact commit of that loader that wrote each file was not recorded, so these files are pinned by their bytes, not by a rebuild recipe. The PolicyEngine organisation publishes earlier files with the same names in another repository; those have different bytes and are not interchangeable with these.
Licence and source terms
The underlying data are public-use microdata from the US Census Bureau and are in the public domain in the United States. PolicyEngine's processed files are offered under CC BY 4.0. The Census Bureau does not endorse this product.
