{
  "schema_version": "f117a-p07-computation-1",
  "snapshot_at": "2026-10-11",
  "approved_input_sha256": "245b87001da7a6bf2d4e9f9d1bb8cbeea56f6c9f463821cdb3edf8ac1a7f8ca8",
  "formulas": {
    "percent_change": "100*(end/start-1)",
    "percentage_points": "end_percentage-start_percentage",
    "inflation_equivalent_amount": "nominal_start_amount*(CPI_end/CPI_start)",
    "relative_rate_change_percent": "100*(rate_end/rate_start-1)"
  },
  "computed": [
    {
      "id": "cpi-jan2021-to-jan2025",
      "metric": "cumulative unadjusted CPI-U index change",
      "start": "2021-01",
      "end": "2025-01",
      "result_pct": "21.44",
      "rounding": "nearest 0.01 percentage point"
    },
    {
      "id": "cpi-jan2025-to-aug2026",
      "metric": "cumulative unadjusted CPI-U index change",
      "start": "2025-01",
      "end": "2026-08",
      "result_pct": "5.45",
      "rounding": "nearest 0.01 percentage point"
    },
    {
      "id": "cpi-jan2021-to-aug2026",
      "metric": "cumulative unadjusted CPI-U index change",
      "start": "2021-01",
      "end": "2026-08",
      "result_pct": "28.06",
      "rounding": "nearest 0.01 percentage point"
    },
    {
      "id": "cpi-aug2025-to-aug2026",
      "metric": "cumulative unadjusted CPI-U index change",
      "start": "2025-08",
      "end": "2026-08",
      "result_pct": "3.40",
      "rounding": "nearest 0.01 percentage point"
    },
    {
      "id": "cpi-100-dollars-jan2021-to-aug2026",
      "metric": "equivalent nominal dollars for the same basket; illustrative amount, NOT actual wages",
      "start": "2021-01",
      "end": "2026-08",
      "nominal_start_dollars": 100,
      "result_dollars": "128.06",
      "rounding": "nearest $0.01"
    },
    {
      "id": "turnout-2020-to-2024",
      "metric": "turnout percentage-point change (percent of CVAP)",
      "start": "2020",
      "end": "2024",
      "result_pp": "-1.50",
      "rounding": "nearest 0.01 percentage point"
    },
    {
      "id": "turnout-relative-change",
      "metric": "relative percent change in turnout rate, not percentage points",
      "start": "2020",
      "end": "2024",
      "result_pct": "-2.25",
      "rounding": "nearest 0.01 percent"
    }
  ],
  "limitations": [
    "These transformations describe CPI and survey rates, not causal attribution.",
    "CPI non-seasonally-adjusted selected months are not a complete monthly series.",
    "Census CPS estimates are self-reports; 2024 counts are rounded in published source."
  ]
}