Cost of Inequality, the Uniform Rule and Cooperative Games

Arsen Palestini () and Giuseppe Pignataro

No 322, Working Papers from ECINEQ, Society for the Study of Economic Inequality

Abstract: The assessment of income inequality can be investigated looking at the solution concepts of the cooperative game theory. We propose a multi-factorial decomposition of the Atkinson index by income sources and evaluate it as a cooperative game of the social cost of inequality. This framework extends the distributive and efficient properties of the uniform rule (Sprumont [35]) in a setup with heterogeneous income sources and single-peaked preferences. We provide an axiomatic foundation of this preference-based allocation rule, called weakly uniform rule, with a further comparison with the solution concept of nucleolus. Sufficient conditions for their coincidence are therefore defined. Finally we characterize a welfare loss game expressed as the difference between the sum of inequalities generated by each source and the cost of the entire distribution. We show that income factors' contributions may increase or decrease the income inequality in the society ensuring different perspectives in terms of public policies.

Keywords: Atkinson index; cost game; uniform rule; income sources; single-peaked preferences. (search for similar items in EconPapers)
JEL-codes: C71 D33 D63 D71 I32 (search for similar items in EconPapers)
Pages: 30 pages
Date: 2014-02
New Economics Papers: this item is included in nep-gth
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Citations: View citations in EconPapers (1)

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