4 IZA Discussion Papers
IZA Discussion Paper No. 5335
published in: Economic Journal, 2013, 123, 1236-1278.
IZA Discussion Paper No. 2680
IZA Discussion Paper No. 2381
published in: R. Vaubel and P. Bernholz (eds.), Political Competition and Economic Regulation, London: Routledge 2007
IZA Discussion Paper No. 948
published in: J. Messina, C. Michelacci, J. Turunen and G. Zoega (eds.), Labour Market Adjustments in Europe, Edward Elgar 2006