7 IZA Discussion Papers
IZA Discussion Paper No. 13851
IZA Discussion Paper No. 13732
IZA Discussion Paper No. 13489
IZA Discussion Paper No. 12251
IZA Discussion Paper No. 10983
published in:International Journal of Economics and Finance, 2020, 12(2), pp. 1-22
IZA Discussion Paper No. 10784
published in: Economics of Education Review, 62 (2018): 151-161
IZA Discussion Paper No. 6699
revised version published in: European Economic Review, 2014, 72, 19-38