1. Aix-Marseille University (Aix-Marseille School of Economics); CNRS and EHESS, IZA and CEPS-INSTEAD
2. ZEW and IZA
3. ZEW, University of Mannheim; University of Oxford; IZA and CESifo
4. CORE (Université catholique du Louvain); IZA and University of Cologne
5. IZA, University of Cologne; ISER and CESifo
6. IZA
7. IZA and University of Cologne