7 IZA Discussion Papers
IZA Discussion Paper No. 13445
IZA Discussion Paper No. 10344
IZA Discussion Paper No. 8658
IZA Discussion Paper No. 6711
IZA Discussion Paper No. 5759
published in: IZA Journal of European Labor Studies, 2012, 1:2
IZA Discussion Paper No. 4035
IZA Discussion Paper No. 3623