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...

This paper asks the question, "How should the level of mass transit service be adjusted when road pricing is introduced for a substitute auto mode?" The reference point for the introduction of road pricing is second-best optimization in transit. Because this involves below- marginal-cost pricing...