{
  "task_id": "F6-dev-01",
  "feasibility": "complete",
  "feasibility_reason": null,
  "data_issues": [
    {
      "issue": "wb_indicators.csv contains regional/income-group aggregates (79 entities with region 'Aggregates')",
      "handling": "Excluded via wb_entities.csv region == 'Aggregates' before choosing the analysis year."
    },
    {
      "issue": "20 countries/economies lack GDP per capita PPP in 2023 (ASM, CHI, CUB, ERI, GIB, GUM, IMN, LIE, MAF, MCO, MNP, NCL, PRK, PYF, SSD, SYR, VEN, VGB, VIR, YEM); missingness is non-random (small territories, conflict/sanctioned states)",
      "handling": "Excluded without imputation as required; counted in n_excluded_missing; possible selection bias discussed in report."
    },
    {
      "issue": "Central African Republic life expectancy is erratic across 2015-2022 (e.g. 18.8 in 2022, 31.5 in 2019)",
      "handling": "Only the analysis-year value is used (57.408 in 2023), which is plausible; kept. Influence assessed by the drop-5-largest-residuals sensitivity."
    },
    {
      "issue": "West Bank and Gaza life expectancy falls ~11.5 years in 2023 (conflict)",
      "handling": "Kept as reported; real data feature, covered by the residual-trimming sensitivity if influential."
    },
    {
      "issue": "Recent-year WDI values may be modelled estimates/projections rather than measurements",
      "handling": "Not verifiable from the provided files; noted as a limitation."
    }
  ],
  "n_input_rows": {
    "wb_indicators.csv": 2349,
    "wb_entities.csv": 296
  },
  "n_analysed": 197,
  "random_seed": null,
  "analysis_year": 2023,
  "n_countries_in_year": 217,
  "n_excluded_missing": 20,
  "complete_countries_by_year": {
    "2015": 199,
    "2016": 199,
    "2017": 199,
    "2018": 199,
    "2019": 199,
    "2020": 199,
    "2021": 199,
    "2022": 199,
    "2023": 197
  },
  "baseline_metric": 7.07645404460588,
  "model_metric": 3.5949979094078177,
  "pearson_r": 0.8613437957840087,
  "r_squared": 0.7419131345356038,
  "effect_estimate": 5.267173451958655,
  "intercept": 22.56709274982858,
  "effect_se": 0.21067528691162227,
  "effect_se_type": "HC3",
  "effect_ci_low": 4.851678797609962,
  "effect_ci_high": 5.682668106307348,
  "ci_critical_value_t": 1.9722040512658325,
  "effect_t_stat": 25.00138259770459,
  "conclusion": "positive_effect",
  "sensitivity_se_hc0": 0.20736485591704354,
  "sensitivity_se_hc1": 0.2084255526375312,
  "sensitivity_se_hc2": 0.20901105806015902,
  "sensitivity_se_classical": 0.22246758287864518,
  "sensitivity_trim5_effect": 5.317276954719264,
  "sensitivity_trim5_se_hc3": 0.19476985624358756,
  "sensitivity_trim5_dropped_iso3": [
    "NGA",
    "GRL",
    "NRU",
    "GNQ",
    "GUY"
  ],
  "mean_life_expectancy": 73.47408158883249
}