1. Business Management Department, Faculty of Industrial Relations, University of the Basque Country (UPV/EHU), Leioa, Spain
2. Department of Sociology, Faculty of Education, Philosophy and Anthropology, University of the Basque Country (UPV/EHU), Donostia-San Sebastian, Spain
3. Department of Sociology, Faculty of Social and Communication Sciences, University of the Basque Country (UPV/EHU), Leioa, Spain