{
  "task_id": "F6-conf-02",
  "sample_start": "2010-01-04",
  "sample_end": "2019-12-31",
  "n_treated": 0,
  "baseline_metric": -0.04285142170604726,
  "model_metric": null,
  "effect_estimate": null,
  "effect_ci_low": null,
  "effect_ci_high": null,
  "conclusion": "premise_invalid",
  "feasibility": "infeasible",
  "feasibility_reason": "The file contains no rows with post_cut = 1 (sample 2010-01-04 to 2019-12-31, ending before the 2020-03-04 cut), so the post-cut mean change and the 120-day pre-window anchored at the first flagged day cannot be computed.",
  "data_issues": [
    {
      "issue": "No rows with post_cut = 1: the file covers 2010-01-04 to 2019-12-31 (README retrieval used end_date=2019-12-31), entirely before the 2020-03-04 cut; post_cut is 0 for all rows.",
      "handling": "Estimand not computable (no treated window, and the 120-day pre-window is defined relative to the first flagged day, which does not exist). post_cut not redefined; no proxy estimate substituted; effect keys set to null, conclusion premise_invalid."
    }
  ],
  "n_input_rows": {
    "gc5y_daily.csv": 2498
  },
  "n_analysed": null,
  "random_seed": null,
  "baseline_n_changes": 2497
}