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Welfare and efficiency in incomplete market economies with a single firm

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  • Dierker, Egbert
  • Dierker, Hildegard

Abstract

In the quasilinear case, surplus maximization leads to constrained efficient Drèze equilibria. We investigate the question of whether surplus maximization can be useful beyond the quasilinear case. We use two different surplus concepts, the equivalent and the compensating surplus. The first one is a utilitarian social welfare function and the second one a measure of inefficiency. We show that social welfare maximization can be at odds with constrained efficiency. In particular, a unique Drèze equilibrium can maximize welfare although it is not minimally constrained efficient. The Drèze equilibrium can also minimize welfare although it entails no efficiency losses. We argue that the two surplus concepts should be used together and that they can help to distinguish between different Drèze equilibria on welfare and efficiency grounds.

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Bibliographic Info

Article provided by Elsevier in its journal Journal of Mathematical Economics.

Volume (Year): 46 (2010)
Issue (Month): 5 (September)
Pages: 652-665

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Handle: RePEc:eee:mateco:v:46:y:2010:i:5:p:652-665

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Web page: http://www.elsevier.com/locate/jmateco

Related research

Keywords: Incomplete markets with production Dreze equilibria Constrained efficiency Minimal efficiency Social welfare Compensating surplus Equivalent surplus;

References

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  1. Egbert Dierker & Hildegard Dierker & Birgit Grodal, 2002. "Are Incomlete Markets Able to Achieve Minimal Efficiency?," Vienna Economics Papers 0212, University of Vienna, Department of Economics.
  2. Maskin, Eric, 1978. "A Theorem on Utilitarianism," Review of Economic Studies, Wiley Blackwell, vol. 45(1), pages 93-96, February.
  3. Deschamps, Robert & Gevers, Louis, 1978. "Leximin and utilitarian rules: A joint characterization," Journal of Economic Theory, Elsevier, vol. 17(2), pages 143-163, April.
  4. Egbert Dierker & Hildegard Dierker, 2010. "Drèze equilibria and welfare maxima," Economic Theory, Springer, vol. 45(1), pages 55-63, October.
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Cited by:
  1. Egbert Dierker & Hildegard Dierker, 2012. "Ownership structure and control in incomplete market economies with transferable utility," Economic Theory, Springer, vol. 51(3), pages 713-728, November.

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