1{2 "task_id": "F6-conf-02",3 "sample_start": "2010-01-04",4 "sample_end": "2019-12-31",5 "n_treated": 0,6 "baseline_metric": -0.042851,7 "model_metric": null,8 "effect_estimate": null,9 "effect_ci_low": null,10 "effect_ci_high": null,11 "conclusion": "premise_invalid",12 "feasibility": "infeasible",13 "feasibility_reason": "The file covers 2010-01-04 to 2019-12-31 only; n_treated = 0, so there is no post-cut window and the post-minus-pre difference in mean one-day changes cannot be computed.",14 "data_issues": [15 {16 "issue": "Sample ends 2019-12-31 (README retrieval end_date=2019-12-31), before the 2020-03-04 cut; post_cut = 0 for all rows, so there are zero treated days and no post-cut window.",17 "handling": "Estimand not computable; effect, CI and model RMSE set to null; conclusion premise_invalid. No proxy (e.g. other dates or synthetic data) substituted."18 },19 {20 "issue": "README describes 2020-03-04 both as the announcement date and as 'the first business day after' the announcement (internal inconsistency in flag description).",21 "handling": "Moot because no 2020 rows exist; post_cut used exactly as provided, not redefined."22 },23 {24 "issue": "Missing values: 0; duplicate dates: 0; dates monotonic increasing: True; post_cut disagreements with 'date >= 2020-03-04' rule: 0.",25 "handling": "No cleaning required; recorded for transparency."26 },27 {28 "issue": "Calendar gaps between consecutive rows: max 5 days; 85 gaps longer than a weekend (Canadian holidays / non-publication days).",29 "handling": "Per task rules, one-day changes are taken between consecutive rows regardless of calendar gap."30 }31 ],32 "n_input_rows": {33 "gc5y_daily.csv": 249834 },35 "n_analysed": null,36 "random_seed": null37}