Topic summary
Interest group
Extracted from the Wikipedia article Advocacy group.
Free rider problem
A general theory is that individuals must be enticed with some type of benefit to join an interest group. However, the free rider problem addresses the difficulty of obtaining members of a particular interest group when the benefits are already reaped without membership. For instance, an interest group dedicated to improving farming standards will fight for the general goal of improving farming for every farmer, even those who are not members of that particular interest group. Thus, there is no real incentive to join an interest group and pay dues if the farmer will receive that benefit anyway. For another example, every individual in the world would benefit from a cleaner environment, but environmental protection interest groups do not receive monetary help from every individual in the world.