105 IZA Discussion Papers
IZA Discussion Paper No. 1066
published in: Journal of Economic Perspectives, 2004, 18 (4), 49-68
IZA Discussion Paper No. 880
IZA Discussion Paper No. 611
pubished in: Solow, Robert M. (ed.): Structural Reform and Macroeconomic Policy, (International Economic Association), Palgrave MacMillan, 2004
IZA Discussion Paper No. 448
published in: Review of Economics and Statistics, 2002, 84 (2), 324-341
IZA Discussion Paper No. 41
published in: Swedish Economic Policy Review, 1998, 5(2), 303-343