Rafael Castelló-Cogollos is Professor of the Department of Sociology and Social Anthropology at the University of Valencia. Degree in Economics (1986). Doctor in Sociology (1999). His research work can be summed up in 4 lines of research. (1) Political sociology: national identities and electoral behaviour. The doctoral thesis (1999), on nationalisms and social structure, gives sense to the axis and from it derive knowledge interests in other axes. In this line he has published 5 articles and 7 chapters, and presented 2 communications. She has participated in 1 financed Research; (2) Political sociology: civic and social participation. Line of work focused on associationism and volunteering, but also on social participation in public policies at the local level. In this field he has published 3 articles, 3 books and 1 chapter and presented 4 communications. He has participated in 2 financed projects. (3) Sociology of culture. This line especially analyses sociolinguistic relations, but also includes research on cultural practices. The advances in sociolinguistic knowledge have been substantiated by his appointment in 2012 as director of the Servei de Política Lingüística of the Universitat de València, a responsibility he still holds. Along these lines, he has published 4 articles, 3 books and 2 chapters, presented 7 papers and participated in 6 funded researches; (4) Social structure, vital precariousness and inequality. Focused on social inequalities (in various areas of social life) and on vital precariousness (components and evolution). He has been working on this axis since 1998, but it has gained strength since 2009, with the participation in the research on vital precariousness (CSO2008-00886/SOCI), financed by the MINECO and directed by Benjamín Tejerina, and with the assumption of the direction of the master’s degree in “Sociology and Anthropology of Public Policies” at the University of Valencia. In this field he has published 3 articles and 2 chapters and presented 7 papers. He has participated in 4 financed projects. His methodological skills include the use of various multivariable techniques: analysis of variance, multiple linear regression, binomial and multinomial logistic regression, correspondence, factorial and main components and conglomerates, among the most relevant. He has also applied content analysis, quantitative and qualitative, and discourse analysis in interviews and focus groups and social network analysis.