When Reciprocity is not Enough : Explaining Anti-Social Outcomes via Intrinsic Personality Traits

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00008501
URN to cite this document: urn:nbn:de:bvb:703-epub-8501-6

Title data

Baumann, Michael Heinrich ; Baumann, Michaela:
When Reciprocity is not Enough : Explaining Anti-Social Outcomes via Intrinsic Personality Traits.
Bayreuth , 2025 . - 28 S.

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Abstract

Behavior and outcomes that do not fit to classical game theory are often observed and, hence, reported. Common explanations for that are, e.g., repeated games, reciprocity, costly punishment, and pure altruism. Via the prisoner's dilemma and costly punishment, we show that those explanations, esp. reciprocity, are not always able to account for outcomes that involve anti-social punishment, i.e., to punish someone after a successful cooperation. We demonstrate, however, that intrinsic motivations, including both altruism and spiteful preferences, additional to material payoffs can explain those outcomes. To capture the agents' intrinsic motivation we introduce a uniform notion of altruism and sadism, the so-called SEA model. Further, we present a Python code to find so-called (pure-strategy) SEA Nash equilibria. Conclusively, we illustrate the SEA model via simple, well-known games.

Further data

Item Type:	Working paper, discussion paper
Keywords:	Game Theory; Fairness; Altruism; Sadism; Egoism; Prisoner's Dilemma; Anti-Social Punishment; Public Goods Game; Reciprocity; One-Shot Game
Subject classification:	JEL codes: C72, C73, D9 UDC: 519.83 MSC2020: 91A05, 91A10, 91A20, 91A40
DDC Subjects:	300 Social sciences > 330 Economics 500 Science > 510 Mathematics
Institutions of the University:	Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Mathematics > Chair Applied Mathematics Profile Fields > Advanced Fields > Nonlinear Dynamics Research Institutions > Central research institutes > Bayreuth Research Center for Modeling and Simulation - MODUS Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Mathematics Profile Fields Profile Fields > Advanced Fields Research Institutions Research Institutions > Central research institutes
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-8501-6
Date Deposited:	24 Jun 2025 08:13
Last Modified:	24 Jun 2025 08:14
URI:	https://epub.uni-bayreuth.de/id/eprint/8501

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