3 IZA Discussion Papers
IZA Discussion Paper No. 9610
published in: ILR Review, 2022, 75 (2), 373-401.
IZA Discussion Paper No. 5076
published in: Foundations and Trends in Microeconomics, 2010, 5 (4), 229-299
IZA Discussion Paper No. 2381
published in: R. Vaubel and P. Bernholz (eds.), Political Competition and Economic Regulation, London: Routledge 2007