8 IZA Discussion Papers
IZA Discussion Paper No. 13317
IZA Discussion Paper No. 12502
IZA Discussion Paper No. 4931
published in: Journal of Public Economics, 2013, 97, 49–60
IZA Discussion Paper No. 3508
published in: Labour Economics, 17:4 (August 2010), 710-722
IZA Discussion Paper No. 3175
IZA Discussion Paper No. 2073
published in: Applied Economics Quarterly, 2007, 53 (4), 375-404
IZA Discussion Paper No. 55
published in: Jahrbücher für Nationalökonomie und Statistik, 1999, 219 (3/4), 308-325