1. Universidad de Sevilla, Facultad de Ciencias Económicas, Universidad de Sevilla, Ramón y Cajal 1, Sevilla 41018, Spain
2. CEBI, Department of Economics, University of Copenhagen, Øster Farimagsgade 5, bygning 26, København K, 1353 Denmark
3. Department of Social Sciences, University College London (UCL), 55–59 Gordon Square, Office 210, London WC1H 0NT, UK