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Ten years of Cook County property-tax appeals (2015–2024), tract demographics, specialized-firm concentration.
Ten-year Cook County appeal record cleaned and matched to 2020 census tracts, the tract-level demographic and income panel from the 2023 ACS, and a specialized-firm concentration analysis. Source records are public under the Illinois Freedom of Information Act.
The cleaned Rooted Forward replication archive for this paper is in preparation. Until it is released, every record below traces to a public upstream source. These are the same files we draw on, hosted by their primary publishers.
Cook County Assessor · Open Data
Property-data downloads, including appeal records.
https://www.cookcountyassessor.com/open-data
Cook County Board of Review
Second-stage appeal records.
https://www.cookcountyboardofreview.com/
U.S. Census ACS 2023 5-year estimates
Tract-level demographic and income panel.
https://data.census.gov/
Files in the archive
cook-appeals-2015-2024.csv
1.74 million appeal filings with outcome and filer-identity field.
cook-appeals-tract-panel.csv
Tract-year panel of filing rate, success rate, reduction magnitude.
cook-appeals-firm-concentration.csv
Specialized firm activity by tract.
cook-appeals-analysis.R
Replication code.
License
Code MIT, derived data CC BY 4.0.
Provenance
The columns and types you can expect once the archive is live. Sample rows are intentionally omitted; we publish only verified records, not synthetic placeholders.
Schema · 5 columns · no sample rows
| Column | Type | Description |
|---|---|---|
| tract_geoid | text | |
| year | int | |
| filings_per_1000 | numeric | |
| success_rate | numeric | |
| median_reduction_pct | numeric |