4 IZA Discussion Papers
IZA Discussion Paper No. 11312
IZA Discussion Paper No. 7084
published as 'Benefits Conditional on Work and the Nordic Model' in: Journal of Public Economics, 2015, 127, 115–126
IZA Discussion Paper No. 5473
published in: International Tax and Public Finance, 2011, 18 (1), 74-92
IZA Discussion Paper No. 4651