@unpublished{publication-5634,
	author={Huck, Steffen and Kosfeld, Michael},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 199},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={The Dynamics of Neighbourhood Watch and Norm Enforcement},
	year=2004,
}