1. School for Advanced International Studies and Department of Economics, Johns Hopkins University, Baltimore, Maryland, USA;
2. National Bureau of Economic Research, Cambridge, Massachusetts, USA
3. Catalan Institution for Research and Advanced Studies (ICREA) and Department of Economics and Business, Universitat Pompeu Fabra, Barcelona, Spain;
4. Barcelona School of Economics, Barcelona, Spain
5. Institute of Political Economy and Governance (IPEG), Barcelona, Spain
6. Centre for Economic and Policy Research (CEPR), London, United Kingdom
7. Centre for Economic Studies and Ifo Institute (CESifo), Munich, Germany
8. School of Economics and Finance, Queen Mary University of London, London, United Kingdom;
9. Centre for Economic Performance, London School of Economics, London, United Kingdom