11 IZA Discussion Papers
IZA Discussion Paper No. 15195
IZA Discussion Paper No. 14806
IZA Discussion Paper No. 14140
IZA Discussion Paper No. 13937
IZA Discussion Paper No. 13796
IZA Discussion Paper No. 13133
IZA Discussion Paper No. 12672
IZA Discussion Paper No. 12314
IZA Discussion Paper No. 6867
published in: Canadian Journal of Higher Education, 2015, 45 (1), 48-82
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. 5432
Published in: Economic Journal, 2013, 123(569), 574-605.