4 IZA Discussion Papers
IZA Discussion Paper No. 7966
published in: International Review of Law and Economics, 2014, 38, 25-32
IZA Discussion Paper No. 5364
IZA Discussion Paper No. 5107
IZA Discussion Paper No. 505
published in: Vierteljahreshefte zur Wirtschaftsforschung / Quarterly Journal of Economic Research, 2002, 71(2), 249-271