1. Institut d'Economia de Barcelona (IEB), Universitat de Barcelona , C/ John Maynard Keynes, 1-11 , Barcelona, 08034, Spain . Email: jaume.magre01@alumni.upf.edu
2. Department of Economics, Universitat Pompeu Fabra, Barcelona School Economics (BSE) and Institut d'Economia de Barcelona (IEB) , Ramon Trias Fargas, 25-27 , Barcelona, 08005, Spain . Email: pierre.magontier@upf.edu
3. Department of Economics, Universitat de Barcelona, and Institut d'Economia de Barcelona (IEB) , C/John Maynard Keynes, 1-11 , Barcelona, 08034, Spain