Interest Groups and Lobbying American Government Some interest groups represent a broad set of interests, while others focus on only a single issue. Some interests are organizations, like businesses, corporations, or governments, which register to lobby, typically to obtain some benefit from the legislature. Other interest groups consist of dues-paying members who join a group, usually voluntarily. Some organizations band together, often joining trade associations that represent their industry or field. Interest groups represent either the public interest or private interests. Private interests often lobby government for particularized benefits, which are narrowly distributed. These benefits usually accrue to wealthier members of society. Public interests, on the other hand, try to represent a broad segment of society or even all persons. Chapter Outline: Introduction Interest Groups Defined Collective Action and Interest Group Formation Interest Groups as Political Participation Pathways of Interest Group Influence Free Speech and the Regulation of Interest Groups The Open Courses Library introduces you to the best Open Source Courses.