Clientelism or client politics is the exchange of goods and services for political support, often involving an implicit or explicit quid-pro-quo. It is closely related to patronage politics and vote buying.
Clientelism involves an asymmetric relationship between groups of political actors described as patrons, brokers, and clients. In client politics, an organized interest group benefits at the expense of the public. Client politics may have a strong interaction with the dynamics of identity politics. This is particularly common in an elite pluralist or rigidly duopolistic system, such as in the United States, where lobbying can have considerable power shaping public policy. The opposite of client politics is entrepreneurial politics, or conviction politics. Although many definitions for clientelism have been proposed, according to the political scientist Allen Hicken, it is generally thought that there are four key elements of clientelistic relationships:
Contingency and iteration are the two components shared across most definitions of clientelism.