144 IZA Discussion Papers
IZA Discussion Paper No. 962
published in: German Economic Review, 2004, 5(4), 481-504
IZA Discussion Paper No. 670
published in: Journal of the European Economic Association, 2007, 5 (5), 885-926,
IZA Discussion Paper No. 507
published in: European Economic Review, 2002, 46 (4-5), 687-724
IZA Discussion Paper No. 300
published in: Journal of the European Economic Association, 2004, 2 (4), 696-719