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Sunspots, Indeterminacy and Pareto Inefficiency in Economies With Incomplete Markets

In: Essays in Dynamic General Equilibrium Theory

Author

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  • Tito Pietra

    (Universita’ G.D’Annunzio)

Abstract

Summary We consider two periods economies with both intrinsic and extrinsic uncertainty. Asset markets are incomplete in the certainty economy. If assets are nominal, there are enough commodities and the number of agents is greater than two and smaller than the total number of states of nature “tomorrow” (minus one), then a sunspot-invariant equilibrium is generically Pareto dominated by some sunspot equilibria. When assets are real, and there are enough commodities, whenever there are sunspot equilibria, typically there are also sunspot equilibria Pareto dominating the sunspot-invariant equilibria under the same restriction on the number of agents (and stronger restrictions on the number of commodities).

Suggested Citation

  • Tito Pietra, 2005. "Sunspots, Indeterminacy and Pareto Inefficiency in Economies With Incomplete Markets," Studies in Economic Theory, in: Alessandro Citanna & John Donaldson & Herakles Polemarchakis & Paolo Siconolfi & Stephan E. Spear (ed.), Essays in Dynamic General Equilibrium Theory, pages 181-201, Springer.
    • Handle: RePEc:spr:steccp:978-3-540-27192-5_8
    DOI: 10.1007/3-540-27192-9_8
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    Cited by:

    1. M. Salto & T. Pietra, 2013. "Welfare and excess volatility of exchange rates," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 52(2), pages 501-529, March.
    2. Mendolicchio, C. & Pietra, T., 2019. "A re-examination of constrained Pareto inefficiency in economies with incomplete markets," Journal of Mathematical Economics, Elsevier, vol. 80(C), pages 39-55.
    3. Mendolicchio, C. & Pietra, T., 2016. "Endowment redistribution and Pareto improvements in GEI economies," Journal of Mathematical Economics, Elsevier, vol. 67(C), pages 181-190.
    4. Guido Cazzavillan & Patrick A. Pintus, 2006. "Endogenous business cycles and dynamic inefficiency," International Journal of Economic Theory, The International Society for Economic Theory, vol. 2(3‐4), pages 279-294, September.

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