4 IZA Discussion Papers
IZA Discussion Paper No. 9660
IZA Discussion Paper No. 7461
published in: IZA Journal of Labor & Development, 2013, 2:5
IZA Discussion Paper No. 6413
published in: Social Indicators Research, 2020, 152(2), 533-553
IZA Discussion Paper No. 4480
published in: International Journal of Manpower, 2010, 31 (2), 188-207