4 IZA Discussion Papers
IZA Discussion Paper No. 13076
forthcoming in: Review of Economics and Statistics
IZA Discussion Paper No. 12482
IZA Discussion Paper No. 8155
published in: Journal for Labour Market Research, 2015, 48 (2), 81-95
IZA Discussion Paper No. 7609
also available as: ILO Employment Working Paper 145 and DIW SOEP Paper 596