Affiliation: | 1. Department of Business Administration and Economics and Center for Mathematical Economics, Bielefeld University, P.O. Box 100131, 33501 Bielefeld, Germany;2. Department of Organization and Economics of Institutions, University of Graz, Austria;3. Department of Econometrics and Operations Research & CentER, Tilburg University, The Netherlands;4. Department of Economics, University of Antwerp, Belgium |