166 IZA Discussion Papers
IZA Discussion Paper No. 427
published in: Journal of Population Economics, 2002, 15 (3), 549–573
IZA Discussion Paper No. 346
IZA Discussion Paper No. 227
published in: European Economic Review, 2004, 48 (6), 1243-1255
IZA Discussion Paper No. 60
IZA Discussion Paper No. 18
IZA Discussion Paper No. 5
published in: Labour Economics, 1999, 6 (2), 229-251