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Why ethical measures of inequality need interpersonal comparisons

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Abstract

An ethical measure of income inequality corresponds to a social ordering of income distributions. Without interpersonal comparisons, the only possible social orderings are dictatorial, so there can be no ethical inequality measure. Interpersonal comparisons allow a very much richer set of possible social orderings, and the construction of ethical measures of inequality.

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Additional information

I have benefited especially from reading the published and unpublished work of Parks, of Sen, and of d'Aspremont and Gevers, and I claim little originality for the ideas expressed here.

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Hammond, P.J. Why ethical measures of inequality need interpersonal comparisons. Theor Decis 7, 263–274 (1976). https://doi.org/10.1007/BF00135081

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