@unpublished{publication-5293,
	author={Frey, Bruno S and Humbert, Silke and Schneider, Friedrich},
	institution={University of Zurich},
	issn={1424-0459},
	number={No. 451},
	series={Working paper series / Institute for Empirical Research in Economics},
	title={What is Economics? Attitudes and views of German economists},
	year=2009,
}