Affiliation: | 1.Universitat de Barcelona, Gran Via de les Corts Catalanes, 585, 08007, Barcelona, Spain ;2.Department of Mathematics, University of Oslo, Blindern, P.O. Box 1053, 0316, Oslo, Norway ;3.NHH, School of Economics, Helleveien 30, 5045, Bergen, Norway ;4.Brazilian School of Public and Business Administration, Getulio Vargas Foundation, Rua Jornalista Orlando Dantas 30, Rio de Janeiro, RJ, 22231-010, Brazil ; |