@unpublished{publication-5303,
	author={Ewerhart, Christian},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 427},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={Cournot Oligopoly and Concavo-Concave Demand},
	year=2009,
}