2 IZA Discussion Papers
IZA Discussion Paper No. 4661
published in: Erik Lehmann and M. Keilbach, M. (eds.), From Industrial Organization to Entrepreneurship: A Tribute to David B. Audretsch, Springer, New York, 2019, 247-265
IZA Discussion Paper No. 3525
revised version published in: Journal of Economic Behavior and Organization, 2010, 76 (1), 45-63