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Necessary and sufficient conditions for global uniqueness of equilibria

Covarrubias, Enrique (2008): Necessary and sufficient conditions for global uniqueness of equilibria.

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Abstract

We study the problem of finding necessary and sufficient conditions that guarantee global uniqueness of equilibria in a pure exchange economy. We show that for every economy to have a unique equilibrium it is necessary and sufficient that (i) there are no critical economies and (ii) a compact set of economies has a compact set of equilibria.

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