44 IZA Discussion Papers
IZA Discussion Paper No. 2816
published in: European Journal of Political Economy, 2008, 24 (1), 25-40
IZA Discussion Paper No. 2742
IZA Discussion Paper No. 2510
revised version published in: Journal of Law and Economics, 2010, 53 (1), 95-136
IZA Discussion Paper No. 2157