{
  "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 month(s) of the window (2025-10): index level absent in the source; not imputed per the task rules",
  "missing_growth_months": [
    "2025-10"
  ],
  "n_months_window": 309,
  "n_months_growth_2001_2013": 156,
  "n_months_growth_2014_2026": 152,
  "n_months_mixed_vintage": 12,
  "sd_growth_12m": 1.7407883259,
  "data_issues": [
    {
      "issue": "cpi_vintage_2026-10-28.csv: empty cpi for 2025-10 (source reports no value)",
      "handling": "level treated as missing, not imputed; g_t for that month reported missing (and any month t whose t-12 is that month; inside the window: none)"
    },
    {
      "issue": "vintages overlap for 30 months (2014-01..2016-06) with revised values (max abs diff 0.455 index points)",
      "handling": "2026-10-28 vintage used for overlap months per latest-vintage rule"
    },
    {
      "issue": "cpi_assembled.csv: months 2014-01..2016-06 taken from the older 2016-07-15 vintage although the 2026-10-28 vintage covers them",
      "handling": "assembled file not used; levels taken directly from the vintage files"
    },
    {
      "issue": "cpi_assembled.csv: month(s) 2016-07 absent",
      "handling": "assembled file not used; levels taken directly from the vintage files"
    },
    {
      "issue": "cpi_assembled.csv: rows labelled 2026-10-28 (2016-08..2026-10) are shifted one month late (value at month m equals the 2026-10-28 vintage value for m-1); file extends to 2026-10, beyond the source",
      "handling": "assembled file not used; levels taken directly from the 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
}