@unpublished{publication-5806,
	author={Frey, Bruno S and Eichenberger, Reiner},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 56},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={A Proposal for a Flexible Europe},
	year=2000,
}