5 IZA Discussion Papers
IZA Discussion Paper No. 17219
IZA Discussion Paper No. 2909
published in: Review of Economic Studies, 2013, 80 (3), 1055-1085
IZA Discussion Paper No. 2195
IZA Discussion Paper No. 796
IZA Discussion Paper No. 407
published in: IAW-Report / Institut für Angewandte Wirtschaftsforschung, 2003, 1, 7 - 66