3 IZA Discussion Papers
IZA Discussion Paper No. 9072
published in: Economics of Education Review, 2018, 64, 13-30
IZA Discussion Paper No. 5761
published in: Demography, 2013, 50 (1), 25-49
IZA Discussion Paper No. 3244
published in: Journal of Policy Analysis and Management, 2009, 28(1), 29-54