First Author:   Fernando Bruna Group on Competition and Development and ECOBAS, Department of Economics, Universidade da Coruña f.bruna@udc.es   Facultade de Economía e Empresa, Campus de Elviña s/n A Coruña, 15071, Spain   +34 881014436(Phone) +34 881014436(Fax) http://pdi.udc.es/en/File/Pdi/9Z97J Second Author: Paolo Rungo Department of Economics, Universidade da Coruña paolo.rungo@udc.es   Facultade de Economía e Empresa, Campus de Elviña s/n A Coruña, 15071, Spain   +34 881012404(Phone) +34 981167070(Fax) http://pdi.udc.es/en/File/Pdi/NP6FJ