Information,optimality and pollution control

A mechanism that provides for the efficient production of public goods suggested recently by Groves-Ledyard is reinterpreted as an efficient emissions' rights market scheme. A generalization of the Groves-Ledyard mechanism which Suchanek has shown to comprise an efficient emissions' quotas scheme is restated and then converted into an efficient emissions' charges scheme. The relationship between these schemes yields the standard duality of optimal emissions' charges and optimal emissions' quotas. This duality result is not as strong as one might believe. As an illustration, two emissions' charges schemes are presented each of which generates the charges dual to the optimal quotas given by the specified optimal emissions' quotas government but which are inefficient in general.