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A note on local uniqueness of equilibria: How isolated is a local equilibrium?

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  • Stefano Matta

Abstract

The motivation of this note is to show how singular values affect local uniqueness. More precisely, Theorem 3.1 shows how to construct a neighborhood (a ball) of a regular equilibrium whose diameter represents an estimate of local uniqueness, hence providing a measure of how isolated a (local) unique equilibrium can be. The result, whose relevance in terms of comparative statics is evident, is based on reasonable and natural assumptions and hence is applicable in many different settings, ranging from pure exchange economies to non-cooperative games.

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  • Stefano Matta, 2021. "A note on local uniqueness of equilibria: How isolated is a local equilibrium?," Papers 2103.04968, arXiv.org.
    • Handle: RePEc:arx:papers:2103.04968
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    References listed on IDEAS

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    5. Loi, Andrea & Matta, Stefano, 2010. "A note on the structural stability of the equilibrium manifold," Journal of Mathematical Economics, Elsevier, vol. 46(4), pages 591-594, July.
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    10. Andrea Loi & Stefano Matta, 2016. "On the topology of the set of critical equilibria," International Journal of Economic Theory, The International Society for Economic Theory, vol. 12(2), pages 107-126, June.
    11. Loi, Andrea & Matta, Stefano, 2009. "A note on the structural stability of the equilibrium manifold," MPRA Paper 15507, University Library of Munich, Germany.
    12. Balasko, Yves, 1997. "The natural projection approach to the infinite-horizon model," Journal of Mathematical Economics, Elsevier, vol. 27(3), pages 251-263, April.
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