64 IZA Discussion Papers
IZA Discussion Paper No. 2509
published in: Journal of Economic Inequality, 2008, 6(1), 89-115
IZA Discussion Paper No. 1701
IZA Discussion Paper No. 1328
published in: Journal of Health Economics, 2007, 26 (2), 213-232
IZA Discussion Paper No. 1092
published in: Economic Journal, 2008, 118 (531), 1385–1417