7 IZA Discussion Papers
IZA Discussion Paper No. 11918
IZA Discussion Paper No. 11425
IZA Discussion Paper No. 8281
revised version available as IZA Discussion Paper No. 11425
IZA Discussion Paper No. 7706
IZA Discussion Paper No. 4742
revised version published as 'Ethnic concentration and language fluency of immigrants: Evidence from the guest-worker placement in Germany' in: Journal of Economic Behavior and Organization, 2016, 131(A), 151-165
IZA Discussion Paper No. 2468
revised version published in: Scandinavian Journal of Economics, 2013, 115 (2), 449-475