12 IZA Discussion Papers
IZA Discussion Paper No. 15643
IZA Discussion Paper No. 12441
IZA Discussion Paper No. 9862
IZA Discussion Paper No. 9862
IZA Discussion Paper No. 9653
IZA Discussion Paper No. 7517
IZA Discussion Paper No. 5821
IZA Discussion Paper No. 4854
IZA Discussion Paper No. 1436
IZA Discussion Paper No. 508
published in: Econometrica, 2002, 70 (2), 2078-2091
IZA Discussion Paper No. 126
published in: Economics of Education Review, 2003, 22 (6), 561-566
IZA Discussion Paper No. 60