1.846 IZA Discussion Papers
IZA Discussion Paper No. 72
published in: Labour Economics, 2003, 10 (1), 73-89
IZA Discussion Paper No. 60
IZA Discussion Paper No. 57
published in: Journal of Human Resources, 2000, 35 (3), 550-569;
see IZA Reprints 54/00
see IZA Reprints 54/00
IZA Discussion Paper No. 43
IZA Discussion Paper No. 29
IZA Discussion Paper No. 23