47 IZA Discussion Papers
IZA Discussion Paper No. 1796
IZA Discussion Paper No. 1099
published in: Applied Economics Quarterly Supplement, 2004, 55, 83-112
IZA Discussion Paper No. 527
published in: Journal of Comparative Economics, 2004, 32 (1), 37-55
IZA Discussion Paper No. 374
published in: International Economic Review, 2006, 47 (3), 895-936
IZA Discussion Paper No. 355
revised version published in: Labour Economics, 2008, 15 (6), 1270-1295
IZA Discussion Paper No. 149
published in: Economic Journal, 2008, 118 (525), 235–257
IZA Discussion Paper No. 121
published in: Michael Lechner and Friedhelm Pfeiffer (eds.), Econometric Evaluation of Labour Market Policies, Physica-Verlag (2001), 125-152