@unpublished{publication-5187,
	author={Steiner, Lasse and Frey, Bruno S},
	institution={University of Zurich},
	issn={1664-7041},
	number={No. 14},
	series={Working paper series / Department of Economics},
	title={Imbalance of World Heritage List: Did the UNESCO Strategy Work?},
	year=2011,
}