Simulations of a prisoner's dilemma show that outgroup homogeneity bias, modeled as group-level Bayesian tracking, produces ingroup favoritism between arbitrary groups through direct reciprocity.
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Outgroup Homogeneity Bias Causes Ingroup Favoritism
Simulations of a prisoner's dilemma show that outgroup homogeneity bias, modeled as group-level Bayesian tracking, produces ingroup favoritism between arbitrary groups through direct reciprocity.