164 IZA Discussion Papers
IZA Discussion Paper No. 619
published in: Industrial and Labor Relations Review, 2004, 57(3), 443-461
IZA Discussion Paper No. 379
published in: Journal of Economic Behavior and Organization, 2006, 61 (1), 55-80
IZA Discussion Paper No. 344
published in: Journal of Population Economics, 2004, 17 (1), 117-131, revised version available here
IZA Discussion Paper No. 180
published in: Labour, 2001, 15 (2), 237-255