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Optimism, pessimism and financial bubbles

This paper shows that it is possible to extend the scope of the existence of rational bubbles when uncertainty is introduced associated with rank-dependent expected utility. This RDU assumption can be viewed as a transformation of probabilities depending on the pessimism/optimism of the agent. The results show that pessimism favors the existence of deterministic bubbles, when optimism may promote the existence of stochastic bubbles. Moreover, under pessimism, the RDU assumption may generate multiple bubbly equilibria. The RDU assumption also leads to new conditions ensuring the (absence of) Pareto-optimality of the competitive equilibrium without bubbles. These conditions still govern the existence of bubbles.

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File URL: ftp://mse.univ-paris1.fr/pub/mse/CES2012/12005.pdf
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Paper provided by Université Panthéon-Sorbonne (Paris 1), Centre d'Economie de la Sorbonne in its series Documents de travail du Centre d'Economie de la Sorbonne with number 12005.

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Length: 37 pages
Date of creation: Feb 2012
Date of revision:
Handle: RePEc:mse:cesdoc:12005
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  1. Olivier, Jacques, 2000. "Growth-Enhancing Bubbles," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 41(1), pages 133-51, February.
  2. Ricardo Caballero & Emmanuel Farhi & Mohamad L. Hammour, 2004. "Speculative Growth: Hints from the US Economy," NBER Working Papers 10518, National Bureau of Economic Research, Inc.
  3. Stefano Bosi & Thomas Seegmuller, 2009. "On Rational Exuberance," Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers) halshs-00367689, HAL.
  4. Hommes, Cars & Sonnemans, Joep & Tuinstra, Jan & van de Velden, Henk, 2008. "Expectations and bubbles in asset pricing experiments," Journal of Economic Behavior & Organization, Elsevier, vol. 67(1), pages 116-133, July.
  5. Dow, James & da Costa Werlang, Sergio Ribeiro, 1992. "Excess volatility of stock prices and Knightian uncertainty," European Economic Review, Elsevier, vol. 36(2-3), pages 631-638, April.
  6. Quiggin, John, 1982. "A theory of anticipated utility," Journal of Economic Behavior & Organization, Elsevier, vol. 3(4), pages 323-343, December.
  7. Farhi, Emmanuel & Tirole, Jean, 2009. "Bubbly Liquidity," TSE Working Papers 09-101, Toulouse School of Economics (TSE), revised Feb 2011.
  8. Andrew B. Abel & N. Gregory Mankiw & Lawrence H. Summers & Richard J. Zeckhauser, 1989. "Assessing Dynamic Efficiency: Theory and Evidence," Review of Economic Studies, Oxford University Press, vol. 56(1), pages 1-19.
  9. Noriyuki Yanagawa & Gene M. Grossman, 1992. "Asset Bubbles and Endogenous Growth," NBER Working Papers 4004, National Bureau of Economic Research, Inc.
  10. Bertrand Wigniolle, 2012. "Optimism, pessimism and financial bubbles," Documents de travail du Centre d'Economie de la Sorbonne 12005, Université Panthéon-Sorbonne (Paris 1), Centre d'Economie de la Sorbonne.
  11. Ricardo J. Caballero & Mohamad L. Hammour, 2002. "Speculative Growth," NBER Working Papers 9381, National Bureau of Economic Research, Inc.
  12. Brock, W.A. & Hommes, C.H. & Wagener, F.O.O., 2006. "More hedging instruments may destabilize markets," CeNDEF Working Papers 06-12, Universiteit van Amsterdam, Center for Nonlinear Dynamics in Economics and Finance.
  13. Tirole, Jean, 1985. "Asset Bubbles and Overlapping Generations," Econometrica, Econometric Society, vol. 53(6), pages 1499-1528, November.
  14. Philippe Weil, 1987. "Confidence and the Real Value of Money in an Overlapping Generations Economy," The Quarterly Journal of Economics, Oxford University Press, vol. 102(1), pages 1-22.
  15. Epstein, Larry G & Wang, Tan, 1994. "Intertemporal Asset Pricing Under Knightian Uncertainty," Econometrica, Econometric Society, vol. 62(2), pages 283-322, March.
  16. Olivier Jean Blanchard & Philippe Weil, 1992. "Dynamic Efficiency, the Riskless Rate, and Debt Ponzi Games Under Uncertainty," NBER Working Papers 3992, National Bureau of Economic Research, Inc.
  17. Alberto Martin & Jaume Ventura, 2010. "Economic Growth with Bubbles," NBER Working Papers 15870, National Bureau of Economic Research, Inc.
  18. Jean-Marc Tallon, 1997. "Risque microéconomique et prix d'actifs dans un modèle d'équilibre général avec espérance d'utilité dépendante du rang," Post-Print halshs-00502512, HAL.
  19. Paul A. Samuelson, 1958. "An Exact Consumption-Loan Model of Interest with or without the Social Contrivance of Money," Journal of Political Economy, University of Chicago Press, vol. 66, pages 467.
  20. Hommes, Cars H., 2006. "Heterogeneous Agent Models in Economics and Finance," Handbook of Computational Economics, in: Leigh Tesfatsion & Kenneth L. Judd (ed.), Handbook of Computational Economics, edition 1, volume 2, chapter 23, pages 1109-1186 Elsevier.
  21. Peled, Dan, 1984. "Stationary pareto optimality of stochastic asset equilibria with overlapping generations," Journal of Economic Theory, Elsevier, vol. 34(2), pages 396-403, December.
  22. Gabrielle Demange & Laroque Guy, 1999. "Social Security and Demographic Shocks," Post-Print halshs-00670903, HAL.
  23. de la Croix,David & Michel,Philippe, 2002. "A Theory of Economic Growth," Cambridge Books, Cambridge University Press, number 9780521001151, June.
  24. Gottardi, Piero, 1996. "Stationary Monetary Equilibria in Overlapping Generations Models with Incomplete Markets," Journal of Economic Theory, Elsevier, vol. 71(1), pages 75-89, October.
  25. Jean-Marc Tallon, 2014. "Décision dans le risque et l'incertain," Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers) halshs-01026078, HAL.
  26. Wang Yong, 1993. "Stationary Equilibria in an Overlapping Generations Economy with Stochastic Production," Journal of Economic Theory, Elsevier, vol. 61(2), pages 423-435, December.
  27. Cass, David, 1972. "On capital overaccumulation in the aggregative, neoclassical model of economic growth: A complete characterization," Journal of Economic Theory, Elsevier, vol. 4(2), pages 200-223, April.
  28. Peter Boswijk & Cars H. Hommes & Sebastiano Manzan, 2005. "Behavioral Heterogeneity in Stock Prices," Tinbergen Institute Discussion Papers 05-052/1, Tinbergen Institute.
  29. Zilcha, Itzhak, 1991. "Characterizing efficiency in stochastic overlapping generations models," Journal of Economic Theory, Elsevier, vol. 55(1), pages 1-16, October.
  30. Andrew B. Abel & N. Gregory Mankiw & Lawrence H. Summers & Richard J. Zeckhauser, 1989. "Assessing Dynamic Efficiency: Theory and Evidence," Review of Economic Studies, Oxford University Press, vol. 56(1), pages 1-19.
  31. repec:spo:wpecon:info:hdl:2441/8607 is not listed on IDEAS
  32. Rao Aiyagari, S. & Peled, Dan, 1991. "Dominant root characterization of Pareto optimality and the existence of optimal equilibria in stochastic overlapping generations models," Journal of Economic Theory, Elsevier, vol. 54(1), pages 69-83, June.
  33. Emmanuel Farhi & Jean Tirole, 2008. "Competing Liquidities: Corporate Securities, Real Bonds and Bubbles," NBER Working Papers 13955, National Bureau of Economic Research, Inc.
  34. Homburg, Stefan, 1992. "Efficient Economic Growth," EconStor Books, ZBW - German National Library of Economics, number 92903.
  35. Machina, Mark J, 1989. "Dynamic Consistency and Non-expected Utility Models of Choice under Uncertainty," Journal of Economic Literature, American Economic Association, vol. 27(4), pages 1622-68, December.
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