Are Groves -- Ledyard Equilibria Attainable?

The article comments on a decentralized procedure for deciding upon the production and financing of public goods, introduced by T. Groves and J. Ledyard. It was said that the procedure seem to avoid the free rider problem that most economists had believed to be unavoidable when allocating public goods. An example which suggests that there may be difficulties with the proposed mechanism if applied to an economy in which there are many individuals, was presented. The difficulties identified do not concern th existence or optimality of equilibrium. The example suggests that it will be impossible to actually attain an equilibrium under the Groves-Ledyard mechanism if the economy is very large.