Konrad, Kai A.; Morath, Florian - Max-Planck-Institut für Steuerrecht und öffentliche … - 2011
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 …