In “Eldred and Fair Use,” Posner comments that awarding a monopoly over Mickey Mouse avoids the congestion problem that occurs with open access highways. Is the public domain a commons like an open access highway? No, it is not.

The authors examine the following paradox: in a dynamic setting, equilibria can be radically different in a model with a finite number of agents than in a model with a continuum of agents. They present a simple strategic setting in which this paradox is a general phenomenon. However, the paradox...

In a monetary model, it is shown that if there is a unique Pareto inefficient barter equilibrium, then a monetary equilibrium exists when traders are sufficiently patient. Copyright 1989 by The Review of Economic Studies Limited.