1. Department of Econometrics, Statistics and Applied Economics and GiM-IREA, Universitat de Barcelona, Barcelona, Spain
2. Blavatnik School of Government, University of Oxford, Oxford, United Kingdom
3. Department of Political Science, University College London, London, United Kingdom
4. Department of Political Science, Ramon Llull-Esade, Barcelona, Spain
5. Department of Social Sciences and Business, Roskilde University, Roskilde, Denmark