@unpublished{publication-11799,
	author={Balogh, Tamás L and Ewerhart, Christian},
	institution={University of Zurich},
	issn={1664-7041},
	number=187,
	pages=26,
	series={Working paper series / Department of Economics},
	title={On the origin of r-concavity and related concepts},
	year=2015,
}