3 IZA Discussion Papers
IZA Discussion Paper No. 4145
published in: Macroeconomic Dynamics, 2015, 19 (3), 643-668
IZA Discussion Paper No. 3357
published in: Economica, 2010, 77 (305), 46–59
IZA Discussion Paper No. 3289
published in: Journal of Labor Research, 2009, 30 (1), 1 - 8