7 IZA Discussion Papers
IZA Discussion Paper No. 13857
IZA Discussion Paper No. 13324
IZA Discussion Paper No. 12140
IZA Discussion Paper No. 9488
published in: IZA Journal of Labor Policy, 2016, 5 (1), 1-30 [Open Access]
IZA Discussion Paper No. 8454
IZA Discussion Paper No. 3905
IZA Discussion Paper No. 2055
published in: Perspektiven der Wirtschaftspolitik, 2006, 7 (3), 379-397