@unpublished{publication-5491,
	author={Frey, Bruno S and Benz, Matthias},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 135},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={Being Independent is a Great Thing: Subjective Evaluations of Self-Employment and Hierarchy},
	year=2006,
}