3 IZA Discussion Papers
IZA Discussion Paper No. 7646
published in: Quarterly Journal of Economics, 2014, 129 (4), 1995-2030
IZA Discussion Paper No. 2428
published in: FinanzArchiv, 2007, 63 (2), 264-277
IZA Discussion Paper No. 1033
published in: European Economic Review, 2006, 50 (3), 647-668