86 IZA Discussion Papers
IZA Discussion Paper No. 2242
published in: Journal of Labor Economics, 2008, 26(1), 181-221
IZA Discussion Paper No. 2029
IZA Discussion Paper No. 1945
IZA Discussion Paper No. 1875
IZA Discussion Paper No. 908
IZA Discussion Paper No. 733
published in: Brussels Economic Review / Cahiers Economiques de Bruxelles, 2004, 47 (3), 387-408