@unpublished{publication-5496,
	author={Kosfeld, Michael and Okada, Akira and Riedl, Arno},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 299},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={Institution Formation in Public Goods Games},
	year=2006,
}