4 IZA Discussion Papers
IZA Discussion Paper No. 11169
substantially revised version available as IZA DP No. 15011
IZA Discussion Paper No. 9183
revised version published in: Journal of Public Economics, 2017, 148, 136-151
IZA Discussion Paper No. 5028
published in: Economic Development and Cultural Change, 2013, 61 (4), 789-823
IZA Discussion Paper No. 1366
revised version published in: Journal of Health Economics, 2007, 26 (3), 536-559