{
  "task_id": "F6-conf-03",
  "feasibility": "complete",
  "feasibility_reason": null,
  "data_issues": [
    {
      "issue": "UNRATE missing value(s) at ['2025-10-01'] (blank in raw FRED CSV)",
      "handling": "outside the 1959Q4-2019Q4 window; dropped with all post-2019Q4 observations, no effect on estimates"
    },
    {
      "issue": "Both series extend beyond 2019Q4 (to 2026) and are the 2026 vintage (revised, not real-time)",
      "handling": "all observations after 2019Q4 excluded before computation; vintage noted as limitation"
    }
  ],
  "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_classical_se_full": 0.01996009291490984,
  "r_squared_full": 0.4082508284562034,
  "intercept_sub1": 0.2542326539884382,
  "intercept_sub2": 0.15168581347724602,
  "beta_sub1_hac_se": 0.03970255328838903,
  "beta_sub2_hac_se": 0.06879369233083424,
  "implied_zero_du_growth_full": 0.7209211099660549,
  "hac_slope_diff_p_value": 0.8548271295127585,
  "hac_intercept_diff_p_value": 0.25395491785679547,
  "hac_joint_break_f_stat": 5.372053278020056,
  "hac_joint_break_p_value": 0.0052299232796137185,
  "hac_se_lag_sensitivity": {
    "0": 0.028957130333809637,
    "2": 0.034370831642247524,
    "8": 0.03729120927832667,
    "12": 0.03656150942843361
  },
  "resid_variance_sub1": 0.07850312611325812,
  "resid_variance_sub2": 0.04827674526450526
}