3 IZA Discussion Papers
IZA Discussion Paper No. 9417
published in: Journal of Political Economy, 2017, 125 (5), 1306-1355
IZA Discussion Paper No. 5897
published in: Fiscal Studies, 2011, 32(2), 187-206
IZA Discussion Paper No. 1356
published in: Industrial Relations, 2009, 48(2), 237-264