1[2 {"id":"C1","text":"Balanced-panel mean life expectancy over 15 countries rose from 78.060 years in 2000 to 81.553 years in 2022, a change of +3.493 years.","results_keys":["mean_2000_balanced","mean_2022_balanced","change_2000_2022_balanced"],"status":"supported","caveat":"Unweighted; balanced set is mostly high-income OECD countries plus Turkiye."},3 {"id":"C2","text":"Of 20 countries in the file, 15 have a recorded value in every year 2000-2022; BGD, ETH, IND, NGA (no rows 2000-2010) and CHE (missing 2007) are excluded, giving 345 country-years.","results_keys":["n_countries_total","n_countries_balanced","n_countries_incomplete","balanced_countries","n_analysed"],"status":"supported","caveat":"Missing years likely reflect an assembly error, not true absence in WDI; not imputed per task rules."},4 {"id":"C3","text":"The naive 2022 mean over all 20 available countries (78.692) is about 2.9 years below the balanced 2022 mean because of composition, so naive cross-year comparisons are misleading.","results_keys":["mean_2022_all_available","mean_2022_balanced"],"status":"supported","caveat":"Descriptive baseline only."},5 {"id":"C4","text":"TUR was duplicated under two names (Turkey/Turkiye) with identical values; de-duplication to one row per iso3-year does not change any value.","results_keys":["data_issues","n_input_rows"],"status":"supported","caveat":"Not checked against the raw API response."}6]7