{
  "task_id": "F2-conf-04",
  "beta_hat": -0.25576772774872947,
  "alpha_hat": 0.18438835418210964,
  "r_squared": 0.40825082845620597,
  "se_iid": 0.019960092914910015,
  "se_hac": 0.03583463330296578,
  "hac_lags": 4,
  "beta_ci_low": -0.326002318421742,
  "beta_ci_high": -0.18553313707571695,
  "okun_negative_5pct": true,
  "mean_growth": 0.7535027550652363,
  "first_quarter": "1960Q1",
  "last_quarter": "2019Q4",
  "n_analysed": 240,
  "feasibility": "complete",
  "feasibility_reason": null,
  "data_issues": [
    {
      "issue": "UNRATE missing (empty field) for month(s) 2025-10-01; outside the 1959Q4-2019Q4 window used",
      "handling": "row dropped; affects no quarter used in the analysis"
    }
  ],
  "n_input_rows": {
    "UNRATE.csv": 945,
    "GDPC1.csv": 319
  },
  "random_seed": null,
  "t_stat_hac": -7.137445096377235,
  "p_value_hac": 9.508157930953398e-13,
  "z_crit_95": 1.959963984540054,
  "baseline_ci_iid_low": -0.2948887909900262,
  "baseline_ci_iid_high": -0.21664666450743272,
  "se_hac_by_lag": {
    "0": 0.028836223207270188,
    "1": 0.032358596534706116,
    "2": 0.034227320236154,
    "4": 0.03583463330296578,
    "6": 0.03687902855135959,
    "8": 0.03713550417540173,
    "12": 0.03640885110228042
  },
  "resid_acf_lags1to4": [
    0.38926161159297024,
    0.29039314373832453,
    0.13912378513356943,
    0.07040439437283147
  ],
  "mean_du": -0.008333333333333335
}