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Evolutionarily stable in-group favoritism and out-group spite in intergroup conflict

  • Kai A. Konrad
  • Florian Morath

We study conflict between two groups of individuals. Using Schaffer's (1988) concept of evolutionary stability we provide an evolutionary underpinning for in-group altruism combined with spiteful behavior towards members of the rival out-group. We characterize the set of evolutionarily stable combinations of in-group favoritism and out-group spite and find that an increase in in-group altruism can be balanced by a decrease in spiteful behavior towards the out-group.

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Paper provided by Max Planck Institute for Tax Law and Public Finance in its series Working Papers with number evolutionarily_stable.

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Length: 22 pages
Date of creation: Jun 2011
Date of revision:
Handle: RePEc:mpi:wpaper:evolutionarily_stable
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