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Analysis of the core under inequality-averse utility functions

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  • Takanashi, Seiji

Abstract

We reexamine core-stability, incorporating inequality-averse preferences and challenging the conventional core’s stability under such preferences. We integrate existing social preferences tied to inequality aversion into a cooperative game model with transferable utility (TU games), introducing a novel core. We characterize the new core through inequalities akin to the “coalitional rationality” in TU games and conduct a comparative statics analysis on two parameters–envy and sympathy–representing inequality aversion. Our findings reveal that an increase in the envy parameter reduces elements in the new core, while heightened sympathy does not consistently decrease core elements.

Suggested Citation

  • Takanashi, Seiji, 2024. "Analysis of the core under inequality-averse utility functions," Mathematical Social Sciences, Elsevier, vol. 129(C), pages 52-60.
    • Handle: RePEc:eee:matsoc:v:129:y:2024:i:c:p:52-60
    DOI: 10.1016/j.mathsocsci.2024.03.001
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    More about this item

    Keywords

    Social preference; Inequality aversion; Cooperative game; Core;
    All these keywords.

    JEL classification:

    • C71 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Cooperative Games
    • D63 - Microeconomics - - Welfare Economics - - - Equity, Justice, Inequality, and Other Normative Criteria and Measurement
    • D91 - Microeconomics - - Micro-Based Behavioral Economics - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making

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