@unpublished{publication-5414,
	author={Telser, Harry and Becker, Karolin and Zweifel, Peter},
	institution={University of Zurich},
	number={No. 412},
	series={Working paper series / Socioeconomic Institute},
	title={Validity and Reliability of Willingness-to-Pay Estimates: Evidence from Two Overlapping Discrete-Choice Experiments},
	year=2008,
}