2,084 IZA Discussion Papers
IZA Discussion Paper No. 17
published in: Journal of Human Resources, 2000, 35(1), 82-115
IZA Discussion Paper No. 13
IZA Discussion Paper No. 11
published in: Applied Economics, 2002, 34 (7), 865-876
IZA Discussion Paper No. 5
published in: Labour Economics, 1999, 6 (2), 229-251