@TechReport{iza:izadps:dp2572,
            	author={McLeish, Kendra N. and Oxoby, Robert J.},
            	title={Identity, Cooperation, and Punishment},
            	year={2007},
	month={Jan},
            	institution={Institute of Labor Economics (IZA)},
            	address={Bonn},
            	type={IZA Discussion Paper},
            	number={2572},
            	url={https://www.iza.org/publications/dp2572},
	abstract={Among economists, there is increased recognition of the role individuals’ identities play in decision-making. In this paper, we conduct laboratory experiments in which we explore the motivations for and the effects of group identity. We find that negative out-group opinion (acting as an inter-group identity threat) can motivate in-group/out-group effects in a simple bargaining context. Further, our results suggest that disparagement of group norms by members of the in-group (acting as an intra-group identity threat) increases the use of costly punishment within the in-group.},
	keywords={identity;fairness;reciprocity;experiments},
            }