There are constraints on pricing congestible facilities. First, if heterogeneous users are observationally indistinguishable, then congestion charges must be anonymous. Second, the time variation of congestion charges may be constrained. Do these constraints undermine the feasibility of marginal...

Consider an urban economy with two types of externalities, negative traffic congestion externalities and positive agglomeration externalities deriving from non-market interaction. Suppose that urban travel can be tolled, that non-market interaction cannot be subsidized, and that non-market...

For presentation at CESifo Venice Summer Institute 2001, Workshop on Environmental Economics and the Economics of Congestion: Coping with Externalities, Venice International University, San Servolo, July 18-19,2001.