[1] Linnaeus Univ, Dept Econ & Stat, Vaxjo, Sweden
[2] Uppsala Ctr Fiscal Studies, Uppsala, Sweden
[3] CESifo, Ctr Labor Studies, Munich, Germany
[4] Uppsala Univ, Dept Econ, Uppsala Ctr Fiscal Studies, Uppsala, Sweden
[5] Univ Milan, Dept Law, Milan, Italy
[6] Bocconi Univ, Dondena Ctr Res Social Dynam, Milan, Italy
[7] CESifo, Munich, Germany