4 IZA Discussion Papers
IZA Discussion Paper No. 15665
IZA Discussion Paper No. 12985
forthcoming in: Routledge Handbook of the Economics of Education
IZA Discussion Paper No. 6653
Journal of Comparative Economics, 2012, 40 (3), 337-356
IZA Discussion Paper No. 3125
published in: Analysis of Firms and Employees - Qualitative and Quantitative Approaches (F. Andersson, S. Bender, J. Lane, K. Shaw, and T. von Wachter, eds.), NBER and University of Chicago, 2008.