"In a general context of union decline, radical trade unions are experiencing a moderate growth in contemporary Spain. This article examines the channels through which workers join radical unions. It applies social network analysis to the study of recruitment in 2012 by the local branch of the Confederación Nacional del Trabajo (CNT) in El Puerto de Santa María, Spain. It concludes that pre-existing social networks (co-workers, family and friends) are essential in trade union recruitment. Due to the rapid growth of the local branch and to the characteristics of this union, the findings of this case study can shed light on the general debate on union membership."

Support: Digital