{
  "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": "No rows with post_cut=1: the file ends on 2019-12-31, before the 2020-03-04 cut, so neither the post-cut mean nor the 120-day pre-window can be formed.",
  "data_issues": [
    {
      "issue": "File covers 2010-01-04 to 2019-12-31 only (README retrieval end_date=2019-12-31); zero rows have post_cut=1 and no observation exists on/after the 2020-03-04 cut, so the post-cut window is empty and the 120-day pre-window (defined relative to the first flagged day) is undefined.",
      "handling": "Estimand declared not estimable (premise_invalid); effect, interval, model RMSE and n_analysed set to null. No proxy window substituted."
    },
    {
      "issue": "6 gaps of >4 calendar days between consecutive rows (holidays/non-publication days)",
      "handling": "changes computed between consecutive rows as specified; multi-day gaps retained"
    }
  ],
  "n_input_rows": {
    "gc5y_daily.csv": 2498
  },
  "n_analysed": null,
  "random_seed": null
}