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Risk Taking and Information Aggregation in Groups

Author

Listed:
  • Spiros Bougheas

    () (Department of Economics, University of Nottingham.)

  • Jeroen Nieboer

    () (Department of Social Policy, London School of Economics and Political Science)

  • Martin Sefton

    () (Department of Economics, University of Nottingham)

Abstract

We report a controlled laboratory experiment examining risk-taking and information aggregation in groups facing a common risk. The experiment allows us to examine how subjects respond to new information, in the form of both privately observed signals and signals reported from others. We find that a considerable number of subjects exhibit ‘reverse confirmation bias’: they place less weight on information from others that agrees with their private signal and more weight on conflicting information. We also find a striking degree of consensus when subjects make decisions on behalf of the group under a random dictatorship procedure. Reverse confirmation bias and the incidence of consensus are considerably reduced when group members can share signals but not communicate.

Suggested Citation

  • Spiros Bougheas & Jeroen Nieboer & Martin Sefton, 2015. "Risk Taking and Information Aggregation in Groups," Discussion Papers 2015-07, The Centre for Decision Research and Experimental Economics, School of Economics, University of Nottingham.
  • Handle: RePEc:not:notcdx:2015-07
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    References listed on IDEAS

    as
    1. Edward L. Glaeser & Cass R. Sunstein, 2007. "Extremism and Social Learning," NBER Working Papers 13687, National Bureau of Economic Research, Inc.
    2. Amrei M. Lahno & Marta Serra-Garcia, 2012. "Peer Effects in Risk Taking," CESifo Working Paper Series 4057, CESifo Group Munich.
    3. Ronald J. Baker II & Susan K. Laury & Arlington W. Williams, 2008. "Comparing Small-Group and Individual Behavior in Lottery-Choice Experiments," Southern Economic Journal, Southern Economic Association, vol. 75(2), pages 367-382, October.
    4. Cooper, David J. & Rege, Mari, 2011. "Misery loves company: Social regret and social interaction effects in choices under risk and uncertainty," Games and Economic Behavior, Elsevier, vol. 73(1), pages 91-110, September.
    5. Uri Gneezy & Jan Potters, 1997. "An Experiment on Risk Taking and Evaluation Periods," The Quarterly Journal of Economics, Oxford University Press, vol. 112(2), pages 631-645.
    6. S. Nageeb Ali & Jacob K. Goeree & Navin Kartik & Thomas R. Palfrey, 2008. "Information Aggregation in Standing and Ad Hoc Committees," American Economic Review, American Economic Association, vol. 98(2), pages 181-186, May.
    7. Matthias Sutter, 2009. "Individual Behavior and Group Membership: Comment," American Economic Review, American Economic Association, vol. 99(5), pages 2247-2257, December.
    8. Jingjing Zhang & Marco Casari, 2012. "How Groups Reach Agreement In Risky Choices: An Experiment," Economic Inquiry, Western Economic Association International, vol. 50(2), pages 502-515, April.
    9. repec:cup:apsrev:v:94:y:2000:i:02:p:407-423_22 is not listed on IDEAS
    10. Bougheas, Spiros & Nieboer, Jeroen & Sefton, Martin, 2013. "Risk-taking in social settings: Group and peer effects," Journal of Economic Behavior & Organization, Elsevier, vol. 92(C), pages 273-283.
    11. Glenn W. Harrison & Morten I. Lau & E. Elisabet Rutström & Marcela Tarazona-Gómez, 2013. "Preferences over social risk," Oxford Economic Papers, Oxford University Press, vol. 65(1), pages 25-46, January.
    12. Ertac, Seda & Gurdal, Mehmet Y., 2012. "Deciding to decide: Gender, leadership and risk-taking in groups," Journal of Economic Behavior & Organization, Elsevier, vol. 83(1), pages 24-30.
    13. repec:cup:apsrev:v:92:y:1998:i:01:p:23-35_20 is not listed on IDEAS
    14. Sobel, Joel, 2014. "On the relationship between individual and group decisions," Theoretical Economics, Econometric Society, vol. 9(1), January.
    15. RobertS. Shupp & ArlingtonW. Williams, 2008. "Risk preference differentials of small groups and individuals," Economic Journal, Royal Economic Society, vol. 118(525), pages 258-283, January.
    16. Charles A. Holt & Susan K. Laury, 2002. "Risk Aversion and Incentive Effects," American Economic Review, American Economic Association, vol. 92(5), pages 1644-1655, December.
    17. Ronald J. Baker II & Susan K. Laury & Arlington W. Williams, 2008. "Comparing Small-Group and Individual Behavior in Lottery-Choice Experiments," Southern Economic Journal, Southern Economic Association, vol. 75(2), pages 367-382, October.
    18. Bikhchandani, Sushil & Hirshleifer, David & Welch, Ivo, 1992. "A Theory of Fads, Fashion, Custom, and Cultural Change in Informational Cascades," Journal of Political Economy, University of Chicago Press, vol. 100(5), pages 992-1026, October.
    19. Gary Charness & Edi Karni & Dan Levin, 2007. "Individual and group decision making under risk: An experimental study of Bayesian updating and violations of first-order stochastic dominance," Journal of Risk and Uncertainty, Springer, vol. 35(2), pages 129-148, October.
    20. Anderson, Lisa R & Holt, Charles A, 1997. "Information Cascades in the Laboratory," American Economic Review, American Economic Association, vol. 87(5), pages 847-862, December.
    21. Abhijit V. Banerjee, 1992. "A Simple Model of Herd Behavior," The Quarterly Journal of Economics, Oxford University Press, vol. 107(3), pages 797-817.
    22. Masclet, David & Colombier, Nathalie & Denant-Boemont, Laurent & Lohéac, Youenn, 2009. "Group and individual risk preferences: A lottery-choice experiment with self-employed and salaried workers," Journal of Economic Behavior & Organization, Elsevier, vol. 70(3), pages 470-484, June.
    23. Urs Fischbacher, 2007. "z-Tree: Zurich toolbox for ready-made economic experiments," Experimental Economics, Springer;Economic Science Association, vol. 10(2), pages 171-178, June.
    24. Sutter, Matthias, 2007. "Are teams prone to myopic loss aversion? An experimental study on individual versus team investment behavior," Economics Letters, Elsevier, vol. 97(2), pages 128-132, November.
    25. repec:cup:apsrev:v:90:y:1996:i:01:p:34-45_20 is not listed on IDEAS
    26. Jeroen Nieboer, 2013. "Risk taking in diverse groups: Gender matters," Discussion Papers 2013-06, The Centre for Decision Research and Experimental Economics, School of Economics, University of Nottingham.
    27. Laughlin, Patrick R., 1999. "Collective Induction: Twelve Postulates," Organizational Behavior and Human Decision Processes, Elsevier, vol. 80(1), pages 50-69, October.
    28. McKelvey, Richard D & Page, Talbot, 1990. "Public and Private Information: An Experimental Study of Information Pooling," Econometrica, Econometric Society, vol. 58(6), pages 1321-1339, November.
    29. Greiner, Ben, 2004. "An Online Recruitment System for Economic Experiments," MPRA Paper 13513, University Library of Munich, Germany.
    30. Lahno, Amrei M. & Serra-Garcia, Marta, 2012. "Peer Effects in Risk Taking," Discussion Papers in Economics 14309, University of Munich, Department of Economics.
    31. Blinder, Alan S & Morgan, John, 2005. "Are Two Heads Better than One? Monetary Policy by Committee," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 37(5), pages 789-811, October.
    32. Joel Sobel, 2014. "On the relationship between individual and group decisions," Levine's Working Paper Archive 786969000000000950, David K. Levine.
    33. Jacob K. Goeree & Leeat Yariv, 2011. "An Experimental Study of Collective Deliberation," Econometrica, Econometric Society, vol. 79(3), pages 893-921, May.
    34. Eldad Yechiam & Meir Druyan & Eyal Ert, 2008. "Observing others' behavior and risk taking in decisions from experience," Judgment and Decision Making, Society for Judgment and Decision Making, vol. 3(7), pages 493-500, October.
    35. Nieboer, Jeroen, 2015. "Group member characteristics and risk taking by consensus," Journal of Behavioral and Experimental Economics (formerly The Journal of Socio-Economics), Elsevier, vol. 57(C), pages 81-88.
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    Cited by:

    1. repec:kap:expeco:v:21:y:2018:i:2:d:10.1007_s10683-017-9538-z is not listed on IDEAS
    2. Marcel Fafchamps & Di Mo, 2018. "Peer effects in computer assisted learning: evidence from a randomized experiment," Experimental Economics, Springer;Economic Science Association, vol. 21(2), pages 355-382, June.

    More about this item

    Keywords

    Group behavior; Teams; Decision Making; Risk; Experiment;

    JEL classification:

    • C91 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Individual Behavior
    • C92 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Group Behavior
    • D71 - Microeconomics - - Analysis of Collective Decision-Making - - - Social Choice; Clubs; Committees; Associations
    • D80 - Microeconomics - - Information, Knowledge, and Uncertainty - - - General

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