3 IZA Discussion Papers
IZA Discussion Paper No. 245
published in: International Tax and Public Finance, 2003, 10(3), 211-228
IZA Discussion Paper No. 239
published in: Journal of Public Economics, 2003, 87 (7-8), 1539-1555
IZA Discussion Paper No. 82
published in: Journal of Public Economics, 2001, 79(3), 503-519