# Verification checks (P4)
- Clean re-run of out/analysis.py (outputs deleted first): results.json, analytic.csv, exclusions.csv byte-identical (SHA-256): PASS
- data/firms.csv SHA-256 unchanged: PASS

- analytic rows == n_analysed: PASS
- n_unique - n_missing == n_analysed: PASS
- ledger first n_before == n_input_rows: PASS
- ledger last n_after == n_analysed: PASS
- ledger n_before-n_removed==n_after: PASS
- ledger chaining: PASS
- n_input - total removed == n_analysed: PASS
- firm_id unique in analytic: PASS
- no NaN revenue_musd: PASS
- mean recomputed: PASS
- median recomputed: PASS
- se>0: PASS
- revenue_musd within plausible range (0,10000): PASS
- raw baseline >> cleaned mean (unit inflation): PASS
- range revenue_musd: 5.742 2057.575