5 IZA Discussion Papers
IZA Discussion Paper No. 10784
published in: Economics of Education Review, 2018, 62, 151 - 161
IZA Discussion Paper No. 7099
IZA Discussion Paper No. 5728
published in: Mark V. Pauly, Thomas G. McGuire, and Pedro P. Barros (eds.), Handbook of Health Economics, Volume 2. New York: Elsevier, 2012, 95-199 95-199
IZA Discussion Paper No. 3524