464 IZA Discussion Papers
IZA Discussion Paper No. 202
IZA Discussion Paper No. 157
published in: Labour Economics, 2001, 8 (6), 621-648
IZA Discussion Paper No. 115
published in: Pacific Economic Review, 2002, 7 (1), 65-84
IZA Discussion Paper No. 5
published in: Labour Economics, 1999, 6 (2), 229-251