# Data audit
| file | SHA-256 | data rows | cols | range | missing | duplicates | gaps |
|---|---|---|---|---|---|---|---|
| UNRATE.csv | 621ff6fa…2a06c (matches README & bundle) | 945 | 2 (observation_date, UNRATE) | 1948-01 to 2026-09 monthly | 1 (2025-10-01 empty) | 0 dup dates | 0 month gaps; sorted |
| GDPC1.csv | 1c6c6e9f…b3343 (matches README & bundle) | 319 | 2 (observation_date, GDPC1) | 1947Q1 to 2026Q3 quarterly | 0 | 0 | 0 quarter gaps; sorted |

Units: UNRATE percent (SA); GDPC1 billions chained 2017 USD SAAR (annual-rate scaling cancels in log ratio).
UNRATE range 2.5–14.8; GDPC1 2172–24611 (all positive, logs valid).

Anomaly: UNRATE 2025-10 missing (no October 2025 CPS release, federal shutdown). It lies outside the 1959Q4–2019Q4 window used, so it has no effect; recorded in data_issues.
Availability: files contain data after 2019Q4 and before 1959Q4; these are excluded by the window filter (see out/exclusions.csv). No violation once filtered.