{
  "task_id": "F6-dev-01",
  "feasibility": "complete",
  "feasibility_reason": null,
  "data_issues": [
    {
      "issue": "wb_indicators.csv mixes countries with 44 aggregate entities (regions/income groups)",
      "handling": "Excluded every entity whose region is 'Aggregates' in wb_entities.csv"
    },
    {
      "issue": "20 countries/economies lack gdp_pc_ppp in 2023: ASM, CHI, CUB, ERI, GIB, GUM, IMN, LIE, MAF, MCO, MNP, NCL, PRK, PYF, SSD, SYR, VEN, VGB, VIR, YEM (small territories plus conflict/sanctioned economies; missingness likely not random)",
      "handling": "Excluded and counted in n_excluded_missing; no imputation"
    },
    {
      "issue": "Central African Republic life-expectancy series is implausibly volatile in earlier years (e.g. 31.5 in 2019, 18.8 in 2022, 57.4 in 2023)",
      "handling": "Its 2023 value is plausible and kept (no task rule allows dropping it); flagged as a data-quality concern"
    },
    {
      "issue": "Life expectancy is reported for every entity-year including tiny territories, indicating modelled (UN WPP) estimates; latest-year values may be provisional",
      "handling": "Used as published; 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_excluded_missing": 20,
  "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": 4.854257477179233,
  "effect_ci_high": 5.6800894267380775,
  "conclusion": "positive_effect",
  "n_countries_total": 217,
  "complete_counts_by_year": {
    "2015": 199,
    "2016": 199,
    "2017": 199,
    "2018": 199,
    "2019": 199,
    "2020": 199,
    "2021": 199,
    "2022": 199,
    "2023": 197
  },
  "effect_se_classical": 0.22246758287864518
}