Group formation through indirect reciprocity

Authored by Koji Oishi, Takashi Shimada, Nobuyasu Ito

Date Published: 2013-03-06

DOI: 10.1103/physreve.87.030801

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Model Documentation: Other Narrative Mathematical description

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Abstract

The emergence of group structure of cooperative relations is studied in an agent-based model. It is proved that specific types of reciprocity norms lead individuals to split into two groups only inside of which they are cooperative. The condition for the evolutionary stability of the norms is also obtained. This result suggests reciprocity norms, which usually promote cooperation, can cause society's separation into multiple groups. DOI: 10.1103/PhysRevE.87.030801

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