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Bubbles and crashes in a Behavioural Finance Model

  • Paul De Grauwe

    (University of Leuven)

  • Marianna Grimaldi

    (Sveriges Riksbank)

We develop a simple model of the exchange rate in which agents optimize their portfolio and use different forecasting rules. They check the profitability of these rules ex post and select the more profitable one.This model produces two kinds of equilibria, a fundamental and a bubble one. In a stochastic environment the model generates a complex dynamics in which bubbles and crashes occur at unpredictable moments. We contrast these "behavioural" bubbles with "rational" bubbles.

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Paper provided by Departamento de Economia, Gestão e Engenharia Industrial, Universidade de Aveiro in its series Working Papers de Economia (Economics Working Papers) with number 25.

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Length: 41 pages
Date of creation: Aug 2005
Handle: RePEc:ave:wpaper:252005
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  1. Dornbusch, Rudiger, 1976. "Expectations and Exchange Rate Dynamics," Journal of Political Economy, University of Chicago Press, vol. 84(6), pages 1161-1176, December.
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  3. Benoit Mandelbrot, 2015. "The Variation of Certain Speculative Prices," World Scientific Book Chapters, in: THE WORLD SCIENTIFIC HANDBOOK OF FUTURES MARKETS, chapter 3, pages 39-78 World Scientific Publishing Co. Pte. Ltd..
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  8. Kenneth A. Froot & Jeffrey A. Frankel, 1986. "Interpreting Tests of Forward Discount Bias Using Survey Data on Exchange Rate Expectations," NBER Working Papers 1963, National Bureau of Economic Research, Inc.
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  10. Cheung, Yin-Wong & Chinn, Menzie David & Marsh, Ian W, 1999. "How Do UK-Based Foreign Exchange Dealers Think Their Market Operates?," CEPR Discussion Papers 2230, C.E.P.R. Discussion Papers.
  11. Yin-Wong Cheung & Menzie D. Chinn, 1999. "Macroeconomic Implications of the Beliefs and Behavior of Foreign Exchange Traders," NBER Working Papers 7417, National Bureau of Economic Research, Inc.
  12. Chiarella, Carl & Dieci, Roberto & Gardini, Laura, 2002. "Speculative behaviour and complex asset price dynamics: a global analysis," Journal of Economic Behavior & Organization, Elsevier, vol. 49(2), pages 173-197, October.
  13. Brunnermeier, Markus K., 2001. "Asset Pricing under Asymmetric Information: Bubbles, Crashes, Technical Analysis, and Herding," OUP Catalogue, Oxford University Press, number 9780198296980, December.
  14. Maurice Obstfeld & Kenneth S. Rogoff, 1996. "Foundations of International Macroeconomics," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262150476.
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  17. Dilip Abreu & Markus K. Brunnermeier, 2003. "Bubbles and Crashes," Econometrica, Econometric Society, vol. 71(1), pages 173-204, January.
  18. Mordecai Kurz & Maurizio Motolese, "undated". "Endogenous Uncertainty and Market Volatility," Working Papers 99005, Stanford University, Department of Economics.
  19. William A. Brock & Cars H. Hommes, 1997. "A Rational Route to Randomness," Econometrica, Econometric Society, vol. 65(5), pages 1059-1096, September.
  20. Kurz, Mordecai, 1994. "On the Structure and Diversity of Rational Beliefs," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 4(6), pages 877-900, October.
  21. Kandel, Eugene & Pearson, Neil D, 1995. "Differential Interpretation of Public Signals and Trade in Speculative Markets," Journal of Political Economy, University of Chicago Press, vol. 103(4), pages 831-872, August.
  22. Meese, Richard A. & Rogoff, Kenneth, 1983. "Empirical exchange rate models of the seventies : Do they fit out of sample?," Journal of International Economics, Elsevier, vol. 14(1-2), pages 3-24, February.
  23. Shang-Jin Wei & Jungshik Kim, 1999. "The Big Players in the Foreign Exchange Market: Do They Trade on Information or Noise?," CID Working Papers 5, Center for International Development at Harvard University.
  24. Blanchard, Olivier Jean, 1979. "Speculative bubbles, crashes and rational expectations," Economics Letters, Elsevier, vol. 3(4), pages 387-389.
  25. Lui, Yu-Hon & Mole, David, 1998. "The use of fundamental and technical analyses by foreign exchange dealers: Hong Kong evidence," Journal of International Money and Finance, Elsevier, vol. 17(3), pages 535-545, June.
  26. Isard,Peter, 1995. "Exchange Rate Economics," Cambridge Books, Cambridge University Press, number 9780521466004, October.
  27. Lux, T. & M. Marchesi, . "Volatility Clustering in Financial Markets: A Micro-Simulation of Interacting Agents," Discussion Paper Serie B 437, University of Bonn, Germany, revised Jul 1998.
  28. Isard,Peter, 1995. "Exchange Rate Economics," Cambridge Books, Cambridge University Press, number 9780521460477, October.
  29. Tirole, Jean, 1982. "On the Possibility of Speculation under Rational Expectations," Econometrica, Econometric Society, vol. 50(5), pages 1163-1181, September.
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