143 IZA Discussion Papers
IZA Discussion Paper No. 498
published in: Canadian Journal of Economics, 2009, 42 (4), 1326 - 1346
IZA Discussion Paper No. 430
published in: Journal of Socio-Economics, 2007, 36 (2), 233 - 249
IZA Discussion Paper No. 419
published in: Journal of Human Resources, 2004, 39 (3), 649-674
Typ