Intergroup bias.

@article{Hewstone2002IntergroupB,
  title={Intergroup bias.},
  author={Miles Hewstone and Mark Rubin and Hazel Willis},
  journal={Annual review of psychology},
  year={2002},
  volume={53},
  pages={
          575-604
        }
}
This chapter reviews the extensive literature on bias in favor of in-groups at the expense of out-groups. We focus on five issues and identify areas for future research: (a) measurement and conceptual issues (especially in-group favoritism vs. out-group derogation, and explicit vs. implicit measures of bias); (b) modern theories of bias highlighting motivational explanations (social identity, optimal distinctiveness, uncertainty reduction, social dominance, terror management); (c) key… 
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