4 IZA Discussion Papers
IZA Discussion Paper No. 12429
published in: American Economic Journal: Economic Policy, 2022, 14 (1), 40–80
IZA Discussion Paper No. 4975
published in: E.A. Hanushek, S. Machin and S. Woessman (eds.), Handbook of the Economics of Education, Amsterdam: Elsevier, 2011, Chapter 9, 423-483
IZA Discussion Paper No. 4345
published in: Economics of Education Review, 2010, 29 (6), 947-958
IZA Discussion Paper No. 3216
published in: Review of Economics and Statistics, 2010, 92 (2), 244-262