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Evolutionarily Stable In-Group Favoritism and Out-Group Spite in Intergroup ConflictKai A. KonradMax Planck Institute for Tax Law and Public Finance; Social Science Research Center Berlin (WZB); Centre for Economic Policy Research (CEPR); CESifo (Center for Economic Studies and Ifo Institute for Economic Research); Institute for the Study of Labor (IZA) Florian MorathMax Planck Institute for Tax Law and Public Finance July 2011 Working Paper of the Max Planck Institute for Tax Law and Public Finance No. 2011-07 Abstract: 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.
Number of Pages in PDF File: 22 Keywords: altruism, spite, in-group favoritism, conflict, evolutionary stability, indirect evolutionary approach JEL Classification: C72, D03, D64, D74 working papers seriesDate posted: July 8, 2011 ; Last revised: January 2, 2012Suggested CitationContact Information
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