@unpublished{publication-5571,
	author={Fehr, Ernst and Fischbacher, Urs and Kosfeld, Michael},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 221},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={Neuroeconomic Foundations of Trust and Social Preferences},
	year=2005,
}