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Social Interaction Effects and Choice Under Uncertainty. An Experimental Study

  • Cooper, David

    ()

    (Florida State University)

  • Rege, Mari

    ()

    (University of Stavanger)

Extensive field evidence shows individuals’ decisions in settings involving choice under uncertainty (e.g. savings and investment choices) depend on the decisions of their peers. One hypothesized cause of peer group effects is social interaction effects: an individual’s utility from an action is enhanced by others taking the same action. We employ a series of controlled laboratory experiments to study the causes of peer effects in choice under uncertainty. We find strong peer group effects in the laboratory. Allowing feedback about others’ choices increases group polarization and reduces the likelihood that subjects will choose risky or ambiguous gambles. We observe spillover effects, as observing another’s choice of one risky (safe) gamble makes all risky (safe) gambles more likely to be chosen. Our design allows us to eliminate social learning, social norms, group affiliation, and complementarities as possible causes for the observed peer group effects, leaving social interaction effects as the likely cause. We use a combination of theory and empirical analysis to show that preferences including “social regret” are more consistent with the data than preferences including a taste for conformity.

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File URL: http://www1.uis.no/ansatt/odegaard/uis_wps_econ_fin/uis_wps_2009_24_cooper_rege.pdf
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Paper provided by University of Stavanger in its series UiS Working Papers in Economics and Finance with number 2009/24.

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Length: 49 pages
Date of creation: 14 Jun 2008
Date of revision:
Handle: RePEc:hhs:stavef:2009_024
Contact details of provider: Postal: University of Stavanger, NO-4036 Stavanger, Norway
Web page: http://www.uis.no/research/economics_and_finance

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  1. Marianne Bertrand & Erzo F. P. Luttmer & Sendhil Mullainathan, 1999. "Network Effects and Welfare Cultures," Working Papers 9903, Harris School of Public Policy Studies, University of Chicago.
  2. E. Glaeser & B. Sacerdote & Jose A. Scheinkman, 2003. "The Social Multiplier," Levine's Working Paper Archive 506439000000000130, David K. Levine.
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  13. Aizer, Anna & Currie, Janet, 2004. "Networks or neighborhoods? Correlations in the use of publicly-funded maternity care in California," Journal of Public Economics, Elsevier, vol. 88(12), pages 2573-2585, December.
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