@unpublished{publication-5594,
	author={M{\"u}hlemann, Samuel and Schweri, J{\"u}rg and Winkelmann, Rainer and Wolter, Stefan C},
	institution={University of Zurich},
	number={No. 504},
	series={Working paper series / Socioeconomic Institute},
	title={A Structural Model of Demand for Apprentices},
	year=2005,
}