@unpublished{publication-18183,
	author={Pull, Kerstin and Pferdmenges, Birgit and Backes-Gellner, Uschi},
	institution={University of Zurich},
	issn={2296-0422},
	number=367,
	pages=19,
	series={UZH Business Working Paper Series},
	title={Do Research Training Groups Operate at Optimal Size?},
	year=2017,
}