@unpublished{publication-5703,
	author={Foellmi, Reto and Zweim{\"u}ller, Josef},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 145},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={Inequality, Market Power, and Product Diversity},
	year=2003,
}