@unpublished{publication-5279,
	author={Frey, Bruno S and Pamini, Paolo},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 462},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={World heritage: Where are we? An empirical analysis},
	year=2010,
}