1. Instituto Universitário de Lisboa (ISCTE-IUL), Business Research Unit (BRU-IUL), Lisboa, Portugal
2. Instituto Universitário de Lisboa (ISCTE-IUL), Business Research Unit (BRU-IUL), DINÂMIA’CET – IUL, Centre for Socioeconomic and Territorial Studies, Lisboa, Portugal
3. The University of Tulsa, USA