1. Polytechnic Institute of Portalegre; Research Units on Governance, Competitiveness and Public Policies (GOVCOPP) and CITUR Algarve, Portalegre, Portugal
2. Polytechnic Institute of Portalegre; Instituto de Comuniçacão da Nova (ICNOVA), Lisbon, Portugal
3. Polytechnic Institute of Portalegre, Portalegre, Portugal