 There is no suggestion here that states or other organizations provide only public or collective goods. Governments often provide noncollective goods like electric power, for example, and they usually sell such goods on the market much as private firms would do. Moreover, as later parts of this study will argue, large organizations that are not able to make membership compulsory must also provide some noncollective goods in order to give potential members an incentive to join. (Olson 1971: 16; emphasis in original)