A large number of potential determinants of union membership, which often can be interpreted in terms of costs and benefits, have been incorporated into economists' traditional supply and demand framework or into new models of an individual's decision to unionise (such as social custom theory)....

A large number of potential determinants of union membership, which often can be interpreted in terms of costs and benefits, have been incorporated into economists' traditional supply and demand framework or into new models of an individual's decision to unionise (such as social custom theory)....

As the influence of labor unions declines in many industrialized nations, particularly the United States, the influence of workers has decreased. Because of the need for greater involvement of workers in changing production systems, as well as frustration with existing structures of workplace...