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Does the Gini index represent people’s views on inequality?

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  • Gaëlle Aymeric

    (University Montpellier, CNRS, INRAE, Institut Agro)

  • Brice Magdalou

    (Aix-Marseille University, CNRS, AMSE)

Abstract

This paper presents findings from a web-experiment on a representative sample of the French population. It examines the acceptability of the Pigou-Dalton principle of transfers, which posits that transferring income from an individual to a relatively poorer one, reduces overall inequality. While up to 50% of respondents reject standard transfers, the three alternative transfers we test receive more approval, especially those promoting solidarity among lower-income recipients. The study then models respondents’ preferences with two types of social welfare functions, utilitarian and Extended Gini. The Extended Gini model aligns better with individual preferences. Nevertheless, Extended Gini-type social welfare functions that adhere to the principle of transfers (including the one underlying the Gini index) poorly capture preferences of each individual. However, quite surprisingly, the preferences of the median individual align well with the Gini-based function, using either parametric or non-parametric estimates.

Suggested Citation

  • Gaëlle Aymeric & Brice Magdalou, 2025. "Does the Gini index represent people’s views on inequality?," The Journal of Economic Inequality, Springer;Society for the Study of Economic Inequality, vol. 23(3), pages 637-665, September.
    • Handle: RePEc:spr:joecin:v:23:y:2025:i:3:d:10.1007_s10888-025-09695-4
    DOI: 10.1007/s10888-025-09695-4
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