sentences:  In this work, Chaison turned his attention to the effectiveness of union mergers.He concluded that mergers do not solve the fundamental problems facing labor unions (such as organizing large numbers of new members or combating the negative effects of globalization), but they do enable unions to rationalize jurisdictions, and to devote more resources to organizing and building political power.In 2002, Chaison and co-author Barbara Bigelow examined the role legitimacy plays in the life of a union.