Small groups of players of a cooperative game with side payments are "effective" if almost all gains to group formation can be realized by groups of players bounded in absolute size. Per capita payoffs are bounded if the average payoff to players has a uniform upper bound, independent of the...

We introduce a model of a local public goods economy with a continuum of agents and jurisdictions with finite but unbounded populations, where the set of possible projects for each jurisdiction/club is unrestricted in size. Under boundedness of per capita payoffs, which simply ensures that equal...

We define a concept of share equilibrium for local public good (or club) economies where individual members of the population may have preferences over the membership of their jurisdiction. A share equilibrium specifies one share index for each individual. These indices determine each...