The aim of this paper is to improve on the model by Fehr and Schmidt (1999) by developing a non-linear model (that leads to interior rather than corner solutions) and by taking into account that different levels of income imply different reactions of fair-minded people. We suggest to modify the inequity-aversion utility function proposed by Fehr and Schmidt by taking into account not only the difference between players' payoffs, but also their absolute value. This allows for a non-linear utility function where different stakes lead to different unique optimal interior solutions.
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Find related papers by JEL classification: A13 - General Economics and Teaching - - General Economics - - - Relation of Economics to Social Values C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games C91 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Individual Behavior D63 - Microeconomics - - Welfare Economics - - - Equity, Justice, Inequality, and Other Normative Criteria and Measurement D64 - Microeconomics - - Welfare Economics - - - Altruism
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