José Manuel Valenzuela is Emeritus Researcher of Conacyt and Professor Emeritus of the Colegio de la Frontera Norte (Colef) where he has been professor-researcher of the Department of Cultural Studies. At this university he has been director of Department, Academic Secretary General and director of the journal Frontera Norte. His research addresses issues related to culture and identity, cultural frontiers, social movements, youth cultures, urban sociology and popular culture.