Subjective Beliefs and ex ante Trade
AbstractWe study a definition of subjective beliefs applicable to preferences that allow for the perception of ambiguity, and provide a characterization of such beliefs in terms of market behavior. Using this definition, we derive necessary and sufficient conditions for the efficiency of ex ante trade and show that these conditions follow from the fundamental welfare theorems. When aggregate uncertainty is absent, our results show that full insurance is efficient if and only if agents share some common subjective beliefs. Our results hold for a general class of convex preferences, which contains many functional forms used in applications involving ambiguity and ambiguity aversion. We show how our results can be articulated in the language of these functional forms, confirming results existing in the literature, generating new results, and providing a useful tool for applications. Copyright 2008 The Econometric Society.
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Bibliographic InfoArticle provided by Econometric Society in its journal Econometrica.
Volume (Year): 76 (2008)
Issue (Month): 5 (09)
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- Philipp Karl ILLEDITSCH, 2009. "Ambiguous Information, Risk Aversion, and Asset Pricing," 2009 Meeting Papers 802, Society for Economic Dynamics.
- Martins-da-Rocha, Victor Filipe, 2009.
"Interim efficiency with MEU-preferences,"
Economics Working Papers (Ensaios Economicos da EPGE)
696, FGV/EPGE Escola Brasileira de Economia e Finanças, Getulio Vargas Foundation (Brazil).
- Luciano Castro & Alain Chateauneuf, 2011.
"Ambiguity aversion and trade,"
Springer, vol. 48(2), pages 243-273, October.
- Atsushi Kajii & Takashi Ui, 2007.
"Interim Efficient Allocations under Uncertainty,"
KIER Working Papers
642, Kyoto University, Institute of Economic Research.
- Dana, Rose-Anne & Riedel, Frank, 2013.
"Intertemporal equilibria with Knightian uncertainty,"
Journal of Economic Theory,
Elsevier, vol. 148(4), pages 1582-1605.
- Rose-Anne Dana & Frank Riedel, 2013. "Intertemporal equilibria with Knightian Uncertainty," Working Papers 16, Department of Research, Ipag Business School.
- Rose-Anne Dana & Frank Riedel, 2010. "Intertemporal Equilibria with Knightian Uncertainty," Working Papers 440, Bielefeld University, Center for Mathematical Economics.
- repec:hal:journl:halshs-00281582 is not listed on IDEAS
- Ani Guerdijkova & Emanuela Sciubba, 2012. "Survival with Ambiguity," Birkbeck Working Papers in Economics and Finance 1216, Birkbeck, Department of Economics, Mathematics & Statistics.
- Dominiak, Adam & Eichberger, Jürgen & Lefort, Jean-Philippe, 2012. "Agreeable trade with optimism and pessimism," Mathematical Social Sciences, Elsevier, vol. 64(2), pages 119-126.
- Nabil I. Al-Najjar & Luciano De Castro, 2010. "Uncertainty, Efficiency and Incentive Compatibility," Discussion Papers 1532, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- Ludovic Renou & Karl H. Schlag, 2009. "From Ordients to Optimization: Substitution Effects without Differentiability," Discussion Papers in Economics 09/6, Department of Economics, University of Leicester.
- repec:hal:journl:halshs-00470670 is not listed on IDEAS
- Riedel, Frank & Dana, Rose-Anne, . "Intertemporal Equilibria with Knightian Uncertainty," Open Access publications from UniversitÃ© Paris-Dauphine urn:hdl:123456789/5375, Université Paris-Dauphine.
- Alain Chateauneuf & Luciano De Castro, 2011. "Ambiguity Aversion and Absence of Trade," Discussion Papers 1535, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- Chambers, Christopher P. & Echenique, Federico, 2012. "When does aggregation reduce risk aversion?," Games and Economic Behavior, Elsevier, vol. 76(2), pages 582-595.
- Luca Rigotti & Matthew Ryan & Rhema Vaithianathan, 2011. "Optimism and firm formation," Economic Theory, Springer, vol. 46(1), pages 1-38, January.
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