{
  "task_id": "F6-conf-03",
  "feasibility": "complete",
  "feasibility_reason": null,
  "data_issues": [
    {
      "issue": "UNRATE missing for 2025-10-01",
      "handling": "Outside the 1959Q4-2019Q4 window; removed by the 2019Q4 cutoff, no imputation needed."
    },
    {
      "issue": "Both files extend beyond 2019Q4 (to 2026), outside the question.",
      "handling": "All rows after 2019-12-31 dropped before any computation."
    }
  ],
  "n_input_rows": {
    "GDPC1.csv": 319,
    "UNRATE.csv": 945
  },
  "n_analysed": 240,
  "random_seed": null,
  "sample_start": "1960-01-01",
  "sample_end": "2019-10-01",
  "n_sub1": 96,
  "n_sub2": 144,
  "baseline_metric": 0.32465793964999184,
  "model_metric": 0.2497438816636253,
  "effect_estimate": -0.2557677277487258,
  "intercept": 0.18438835418210714,
  "effect_se": 0.03598488399675878,
  "hac_lags": 4,
  "effect_ci_low": -0.3262968043702248,
  "effect_ci_high": -0.18523865112722682,
  "beta_sub1": -0.25902105345680587,
  "beta_sub2": -0.27339263306757905,
  "chow_f_stat": 6.0903330062337675,
  "chow_p_value": 0.002636323851733417,
  "stability_conclusion": "unstable",
  "conclusion": "negative_effect",
  "ols_se_beta_iid": 0.01996009291490984,
  "hac_lags_sub1": 3,
  "hac_lags_sub2": 4,
  "r_squared": 0.4082508284562034,
  "ssr_pooled": 14.96928154281957,
  "ssr_sub1": 7.379293854646264,
  "ssr_sub2": 6.855297827559747,
  "intercept_sub1": 0.2542326539884382,
  "intercept_sub2": 0.15168581347724602,
  "hac_wald_break_joint_chi2": 10.744106556040112,
  "hac_wald_break_joint_p": 0.004644584888844005,
  "hac_wald_break_slope_chi2": 0.033475422396223316,
  "hac_wald_break_slope_p": 0.8548271295127583,
  "sigma_resid_sub1": 0.27725014755493266,
  "sigma_resid_sub2": 0.21818853066467392,
  "se_beta_sub1": 0.03921717107661775,
  "se_beta_sub2": 0.06879369233083424
}