February 1998 <p> In smooth exchange economies with a continuum of agents, any Walrasian mechanism is Pareto efficient, individually rational, anonymous, and strategy-proof.  Barberà and Jackson's (1995) results imply that no such efficient mechanism is the limit of resource-balanced,...</p>

Consider an "isolation paradox" game with many identical players. By definition, conforming to a rule which maximizes average utility is individually a strictly dominated strategy. Suppose, however, that some players think "quasi-magically" in accordance with evidential (but not causal) decision...