{
  "task_id": "F1-conf-01",
  "first_growth_month": "2001-01",
  "last_month": "2026-09",
  "n_months_growth": 308,
  "n_months_missing_growth": 1,
  "n_analysed": 308,
  "mean_growth_12m": 2.5741201901,
  "mean_growth_12m_2001_2013": 2.3612153974,
  "mean_growth_12m_2014_2026": 2.7926277404,
  "growth_2014_06": 2.0976342439,
  "growth_2016_07": 0.8683633431,
  "growth_2020_05": 0.1982013036,
  "growth_2022_06": 8.9793611031,
  "growth_2026_09": 3.7172508443,
  "max_growth_12m": 8.9793611031,
  "max_growth_month": "2022-06",
  "min_growth_12m": -1.9587610038,
  "min_growth_month": "2009-07",
  "feasibility": "partial",
  "feasibility_reason": "g_t not computable for 1 window month(s) (2025-10) because the source publishes no index level for 2025-10; all summary estimands computed over the remaining 308 months",
  "data_issues": [
    {
      "issue": "2026-10-28 vintage reports no value (empty cpi) for 2025-10",
      "handling": "not imputed; g_t for affected window months (2025-10) reported missing and excluded from means; the latest vintage still governs that month, so the older vintage is not used as a fallback (it does not cover it anyway)"
    },
    {
      "issue": "vintages overlap for 30 months (2014-01..2016-06) with different values (mean abs diff 0.191, max 0.455 index points; seasonal-factor revisions)",
      "handling": "2026-10-28 vintage values used for overlap months per information rule"
    },
    {
      "issue": "for 12 months (2014-01..2014-12) P_t comes from the 2026-10-28 vintage but P_(t-12) only exists in the 2016-07-15 vintage (new extract starts 2014-01), so the ratio mixes vintages",
      "handling": "computed as prescribed by the latest-vintage rule; flagged as a limitation (revision noise in those 12 growth rates)"
    },
    {
      "issue": "cpi_assembled.csv contains assembly errors: months missing ['2016-07'], extra months ['2026-10'], 152 months whose value differs from the rule-based splice (2014-01..2016-06 taken from the old vintage; from 2016-08 on, each new-vintage value is labelled one month late)",
      "handling": "assembled file not used for computation; series rebuilt from the two authoritative vintage files"
    }
  ],
  "n_input_rows": {
    "cpi_vintage_2016-07-15.csv": 834,
    "cpi_vintage_2026-10-28.csv": 153,
    "cpi_assembled.csv": 957
  },
  "random_seed": null,
  "n_months_window": 309,
  "n_months_2001_2013": 156,
  "n_months_2014_2026": 152,
  "missing_growth_months": [
    "2025-10"
  ],
  "sd_growth_12m": 1.7407883259
}