The National Federation of Community Broadcasters was formed in 1975 as a membership organization for community radio stations. NFCB publishes handbooks for stations, hosts an annual conference and lobbies on behalf of community radio at the federal level. It was criticized in the 1990s for perceptions it advocated homogenization of programming. The organization has changed leadership since this period. The Grassroots Radio Coalition is a loose network of stations which formed as a reaction against increasing commercialization of public radio and lack of support for volunteer-based stations.