6 IZA Discussion Papers
IZA Discussion Paper No. 15781
IZA Discussion Paper No. 6566
IZA Discussion Paper No. 1944
published in: Journal of the European Economic Association, 2006, 4 (2-3), 531-541
IZA Discussion Paper No. 1944
published in: Journal of the European Economic Association, 2006, 4 (2-3), 531-541
IZA Discussion Paper No. 1708
published in: International Journal of Productivity and Performance Management, 2006, 55 (7), 569 - 593
IZA Discussion Paper No. 150