404 IZA Discussion Papers
IZA Discussion Paper No. 502
published in: Annales d'Economie et de Statistique, 2004, 71-72, 97-139
IZA Discussion Paper No. 500
published in: Economics Letters, 2003, 78 (3), 385-394
IZA Discussion Paper No. 392
published in: R. Muffels, P. Tsakloglou and D. Mayes (eds.), Social Exclusion in European Welfare States, Edward Elgar, Cheltenham, 2002, pp. 135-169
IZA Discussion Paper No. 356
published in: Fiscal Studies, 2001, 22 (4), 547-565