Top expenditure distribution in Arab countries and the inequality puzzle1

Abstract

This study was motivated by reports of a mismatch between inequality experienced on the streets across the Arab region, and that estimated in household expenditure surveys. The study uses eleven surveys from Egypt, Jordan, Palestine, Sudan and Tunisia to investigate whether the dispersion of top expenditures and measurement errors in them bias the measurement of inequality. The expenditure distributions are corrected by replacing potentially mismeasured values with those drawn from parametric distributions. Across all surveys, expenditure inequality is found to be at or below that found in emerging countries worldwide. The Gini is consistently 0.30–0.32 in Egypt, 0.35–0.37 in Jordan, and 0.38–0.43 in Palestine, Sudan and Tunisia. Several surveys include outliers raising inequality estimates. The Egyptian, Palestinian, and Tunisian surveys exhibit smoother top tails of expenditures, approximable by parametric distributions. Across years leading up to the Arab Spring, the estimates in these countries show falling inequality, suggesting that data problems are not behind the Arab inequality puzzle.