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Games 2017, 8(3), 38; doi:10.3390/g8030038

Strategic Behavior of Moralists and Altruists

1
Toulouse School of Economics, CNRS, University of Toulouse Capitole, Toulouse, France
2
Institute for Advanced Study in Toulouse, Toulouse, France
3
Stockholm School of Economics, Stockholm, Sweden
4
KTH Royal Institute of Technology, Stockholm, Sweden
*
Author to whom correspondence should be addressed.
Received: 31 July 2017 / Revised: 27 August 2017 / Accepted: 30 August 2017 / Published: 11 September 2017
(This article belongs to the Special Issue Ethics, Morality, and Game Theory)
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Abstract

Does altruism and morality lead to socially better outcomes in strategic interactions than selfishness? We shed some light on this complex and non-trivial issue by examining a few canonical strategic interactions played by egoists, altruists and moralists. By altruists, we mean people who do not only care about their own material payoffs but also about those to others, and, by a moralist, we mean someone who cares about own material payoff and also about what would be his or her material payoff if others were to act like himself or herself. It turns out that both altruism and morality may improve or worsen equilibrium outcomes, depending on the nature of the game. Not surprisingly, both altruism and morality improve the outcomes in standard public goods games. In infinitely repeated games, however, both altruism and morality may diminish the prospects of cooperation, and to different degrees. In coordination games, morality can eliminate socially inefficient equilibria while altruism cannot. View Full-Text
Keywords: altruism; morality; Homo moralis; repeated games; coordination games altruism; morality; Homo moralis; repeated games; coordination games
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Alger, I.; Weibull, J.W. Strategic Behavior of Moralists and Altruists. Games 2017, 8, 38.

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