{
  "task_id": "F6-conf-02",
  "sample_start": "2010-01-04",
  "sample_end": "2019-12-31",
  "n_treated": 0,
  "baseline_metric": -0.042851,
  "model_metric": null,
  "effect_estimate": null,
  "effect_ci_low": null,
  "effect_ci_high": null,
  "conclusion": "premise_invalid",
  "feasibility": "infeasible",
  "feasibility_reason": "data/gc5y_daily.csv ends on 2019-12-31 and contains no rows with post_cut = 1; the post-cut mean change (and hence the effect, its CI and the two-window model RMSE) cannot be computed. No proxy or extrapolated estimate is substituted.",
  "data_issues": [
    {
      "issue": "Sample covers 2010-01-04 to 2019-12-31 only, although the treatment date is 2020-03-04; the README's retrieval URL used end_date=2019-12-31.",
      "handling": "No post-cut observations exist; estimand declared not estimable (premise_invalid)."
    },
    {
      "issue": "post_cut is 0 for all 2498 rows (n_treated = 0).",
      "handling": "Treatment indicator used as provided, not redefined; effect, CI and model RMSE set to null."
    },
    {
      "issue": "Missing values: 0; duplicate dates: 0; calendar gaps up to 5 days (weekends/holidays, 6 gaps >4 days).",
      "handling": "No missing/duplicate rows; changes computed between consecutive rows as specified; first row has no change and is dropped from change means."
    }
  ],
  "n_input_rows": {
    "gc5y_daily.csv": 2498
  },
  "n_analysed": null,
  "random_seed": 0
}