5 IZA Discussion Papers
IZA Discussion Paper No. 16535
IZA Discussion Paper No. 15590
IZA Discussion Paper No. 11815
forthcoming in: Journal of the European Economic Association
IZA Discussion Paper No. 9917
published in Economics of Education Review 59 (2017), 1-12
IZA Discussion Paper No. 2638
published in: Journal of Comparative Economics, 2011, 39 (2), 140-158