FEEM working papers "Note di lavoro" series
2015 .054

Equilibrium and Matching under Price Controls


Autori: P. Jean-Jacques Herings
Serie: Climate Change and Sustainable Development
Editor: Carlo Carraro
Parole chiave: Price Controls, Matching, Stable Outcomes, Competitive Equilibrium, Drèze Equilibrium
Numero JEL: C71, C78, D45, D51

Abstract

The paper considers a one-to-one matching with contracts model in the presence of price controls. This set-up contains two important streams in the matching literature, those with and those without monetary transfers, as special cases and allows for intermediate cases with some restrictions on the monetary transfers that are feasible. An adjustment process that ends with a stable outcome is presented, thereby proving the existence of stable outcomes. The process contains the deferred acceptance algorithm of Gale and Shapley (1962) and the approximate auction mechanism of Demange, Gale, and Sotomayor (1986) as special cases. The paper presents a notion of competitive equilibrium, called Drèze equilibrium, for this class of models, an extension of the concept as developed by Drèze (1975) for economies with divisible commodities subject to price controls. It is shown that Drèze equilibrium allocations are equivalent to allocations induced by stable outcomes. One implication is the existence of Drèze equilibria. Another implication is the equivalence of a competitive equilibrium concept and the concept of stable outcomes that is valid with and without monetary transfers as well as when monetary transfers are limited.

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Suggested citation: Herings, P.J.J., (2015), 'Equilibrium and Matching under Price Controls', Nota di Lavoro 54.2015, Milan, Italy: Fondazione Eni Enrico Mattei

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