Methodology

Every published number is produced by the versioned ruleset below. Nothing else. Same evidence + same rules = same verdict, forever. Re-derive any verdict from its stored evidence plus this definition.

Active ruleset: v1.0.0 · hash ad9e31746049460187c3e89423578188a8a86b4e00b6d00496d7a693cef5a28e

{
  "version": "v1.0.0",
  "min_samples": 4,
  "high_confidence": 20,
  "medium_confidence": 8,
  "half_life_days": 900,
  "trim_low_mult": 0.2,
  "trim_high_mult": 2.2,
  "trim_iterations": 2,
  "max_receipts": 12,
  "gates": {
    "min_volume": 8,
    "min_sources": 3,
    "max_age_days": 180,
    "max_iqr_ratio": 2.5
  }
}

Corridor tax rules (landed cost)

Every rule below cites its official source. Rules unverified for 180+ days render a staleness warning on every derived number.

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