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Bubbles, Human Judgment, and Expert Opinion

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Abstract
Research in psychology and behavioral finance is surveyed for evidence to what extent experts such as professional investment managers or endowment trustees may behave in such a way as to help perpetuate speculative bubbles in financial markets. This paper discusses scholarly psychological literature on the representativeness heuristic, overconfidence, attentional anomalies, self-esteem, conformity pressures, salience and justification for insights into weaknesses in expert opinion. The role of the prudent person standard and the news media in influencing experts is considered. The relevance of the literature on testing of the efficient markets theory is discussed.

Suggested Citation

  • Robert J. Shiller, 2001. "Bubbles, Human Judgment, and Expert Opinion," Cowles Foundation Discussion Papers 1303, Cowles Foundation for Research in Economics, Yale University.
    • Handle: RePEc:cwl:cwldpp:1303
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    File URL: https://cowles.yale.edu/sites/default/files/files/pub/d13/d1303.pdf
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    References listed on IDEAS

    as
    1. Barberis, Nicholas & Shleifer, Andrei & Vishny, Robert, 1998. "A model of investor sentiment," Journal of Financial Economics, Elsevier, vol. 49(3), pages 307-343, September.
    2. Basu, Sanjoy, 1983. "The relationship between earnings' yield, market value and return for NYSE common stocks : Further evidence," Journal of Financial Economics, Elsevier, vol. 12(1), pages 129-156, June.
    3. Robert J. Shiller & John Pound, 1986. "Survey Evidence on Diffusion of Interest Among Institutional Investors," Cowles Foundation Discussion Papers 794, Cowles Foundation for Research in Economics, Yale University.
    4. John Y. Campbell & Robert J. Shiller, 2001. "Valuation Ratios and the Long-Run Stock Market Outlook: An Update," NBER Working Papers 8221, National Bureau of Economic Research, Inc.
    5. Peter M. deMarzo & Dimitri Vayanos & Jeffrey Zwiebel, 2000. "A Model of Persuasion - With Implications for Financial Markets," Econometric Society World Congress 2000 Contributed Papers 1635, Econometric Society.
    6. Heath, Chip & Tversky, Amos, 1991. "Preference and Belief: Ambiguity and Competence in Choice under Uncertainty," Journal of Risk and Uncertainty, Springer, vol. 4(1), pages 5-28, January.
    Full references (including those not matched with items on IDEAS)

    Citations

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    Cited by:

    1. Syed Abul, Basher & Salem, Nechi & Hui, Zhu, 2014. "Dependence patterns across Gulf Arab stock markets: a copula approach," MPRA Paper 56566, University Library of Munich, Germany.
    2. Bjuggren, Per-Olof & Wiberg, Daniel, 2005. "Industry Specific Effects in Investment Performance and Valuation of Firms - Marginal q in a Stock Market Bubble," Working Paper Series in Economics and Institutions of Innovation 45, Royal Institute of Technology, CESIS - Centre of Excellence for Science and Innovation Studies.
    3. Robert J. Shiller, 2003. "From Efficient Markets Theory to Behavioral Finance," Journal of Economic Perspectives, American Economic Association, vol. 17(1), pages 83-104, Winter.
    4. Tal Shavit & Shosh Shahrabani & Uri Benzion, 2010. "Effect of price quoting on financial asset prices: an experimental analysis," Applied Economics Letters, Taylor & Francis Journals, vol. 17(12), pages 1219-1222.
    5. Herrera, Santiago & Perry, Guillermo, 2001. "Tropical bubbles : asset prices in Latin America, 1980-2001," Policy Research Working Paper Series 2724, The World Bank.
    6. Markus Glaser & Thomas Langer & Martin Weber, 2007. "On the Trend Recognition and Forecasting Ability of Professional Traders," Decision Analysis, INFORMS, vol. 4(4), pages 176-193, December.
    7. Qin Xiao & Gee Kwang Randolph Tan, 2007. "Signal Extraction with Kalman Filter: A Study of the Hong Kong Property Price Bubbles," Urban Studies, Urban Studies Journal Limited, vol. 44(4), pages 865-888, April.
    8. Qin Xiao & Randolph Gee Kwang Tan, 2006. "Markov-switching Unit Root Test: A study of the Property Price Bubbles in Hong Kong and Seoul," Economic Growth Centre Working Paper Series 0602, Nanyang Technological University, School of Social Sciences, Economic Growth Centre.
    9. Rafał Wolski & Monika Bolek & Jerzy Gajdka & Janusz Brzeszczyński & Ali M. Kutan, 2023. "Do investment fund managers behave rationally in the light of central bank communication? Survey evidence from Poland," Qualitative Research in Financial Markets, Emerald Group Publishing Limited, vol. 15(5), pages 757-794, February.
    10. Francesc Trillas Jané, 2016. "Behavioral Regulatory Agencies," Working Papers wpdea1606, Department of Applied Economics at Universitat Autonoma of Barcelona.

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    More about this item

    Keywords

    Institutional investors; investment professionals; organizations; committees; stock market; speculative markets; behavioral finance; feedback; groupthink; representativeness; heuristic; conservatism; subjective probability; prudent person; standard; ERISA; news media; attention; efficient markets; conformity pressures; true uncertainty;
    All these keywords.

    JEL classification:

    • G10 - Financial Economics - - General Financial Markets - - - General (includes Measurement and Data)

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