1. Nova School of Business and Economics , Carcavelos , Portugal
2. Department of Economics , Universidad Carlos III de Madrid , Getafe , Spain
3. ECARES, Université Libre de Bruxelles – SBS-EM , Brussels , Belgium
4. RWI – Leibniz Institute for Economic Research , Essen , Germany
5. ISEG – Universidade de Lisboa, UECE/ REM , Lisboa , Portugal
6. IZA – Institute for Labor Economics , Bonn , Germany
7. Centre for Economic Policy Research , London , UK