Pecorino (1998) models tariff lobbying in a repeated game and finds that cooperation can be maintained in a large group, even though tariff lobbying provides a rival public good to interest group members. We add small fixed costs of participation to this model and find that cooperation must...

In their seminal paper, Aumann, Kurz, and Neyman found the surprising result that the choice of levels of public goods in a democracy is not affected by the distribution of voting rights. This implies that groups of individuals may not value the franchise. This conclusion, however, does not...