{
  "task_id": "F6-conf-02",
  "sample_start": "2010-01-04",
  "sample_end": "2019-12-31",
  "n_treated": 0,
  "baseline_metric": -0.042851421706047235,
  "model_metric": null,
  "effect_estimate": null,
  "effect_ci_low": null,
  "effect_ci_high": null,
  "conclusion": "premise_invalid",
  "feasibility": "infeasible",
  "feasibility_reason": "The file covers 2010-01-04 to 2019-12-31 and contains no rows with post_cut=1 (the cut was announced 2020-03-04), so the post-cut mean change and the 120-day pre-window anchored on the first treated day do not exist.",
  "data_issues": [
    {
      "issue": "Coverage ends 2019-12-31 (README: Valet query end_date=2019-12-31), before the 2020-03-04 cut; post_cut is 0 for all 2498 rows, so there are zero treated days",
      "handling": "Estimand not computable; effect, CI and model RMSE set to null, conclusion premise_invalid. post_cut not redefined and no proxy event or extrapolation substituted."
    },
    {
      "issue": "6 calendar gaps of 5 days (year-end holidays, e.g. 2010-12-29); one-day changes span non-trading days",
      "handling": "kept; changes defined between consecutive rows per the task rule"
    }
  ],
  "n_input_rows": {
    "gc5y_daily.csv": 2498
  },
  "n_analysed": null,
  "random_seed": null,
  "n_changes": 2497,
  "n_missing_rows": 0,
  "n_duplicate_dates": 0,
  "baseline_change_sd_bp": 4.236328637827247
}