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Individual vs. Group Decision Making: an Experiment on Dynamic Choice under Risk and Ambiguity

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  • Enrica Carbone
  • Konstantinos Georgalos
  • Gerardo Infante

Abstract

This paper focuses on comparing individual and group decision making, in a stochastic inter-temporal problem in two decision environments, namely risk and ambiguity. Using a consumption/saving laboratory experiment, we investigate behaviour in four treatments: (1) individual choice under risk; (2) group choice under risk; (3) individual choice under ambiguity and (4) group choice under ambiguity. Comparing decisions within and between decision environments, we find an anti-symmetric pattern. While individuals are choosing on average closer to the theoretical optimal predictions, compared to groups in the risk treatments, groups tend to deviate less under ambiguity. Within decision environments, individuals deviate more when they choose under ambiguity, while groups are better planners under ambiguity rather than under risk. We argue that the results might be driven by differences in the levels of ambiguity and risk attitudes between individuals and groups, extending the frequently observed pattern of groups behaving closer to risk and ambiguity neutrality, to its dynamic dimension.

Suggested Citation

  • Enrica Carbone & Konstantinos Georgalos & Gerardo Infante, 2016. "Individual vs. Group Decision Making: an Experiment on Dynamic Choice under Risk and Ambiguity," Working Papers 138739716, Lancaster University Management School, Economics Department.
  • Handle: RePEc:lan:wpaper:138739716
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    Cited by:

    1. Raja R Timilsina & Koji Kotani & Yoshinori Nakagawa & Tatsuyoshi Saijo, 2019. "Intragenerational deliberation and intergenerational sustainability dilemma," Working Papers SDES-2019-14, Kochi University of Technology, School of Economics and Management, revised Dec 2019.

    More about this item

    Keywords

    Risk; Ambiguity; Inter-temporal Optimisation; Group Decision Making; Learning; 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
    • D11 - Microeconomics - - Household Behavior - - - Consumer Economics: Theory
    • D91 - Microeconomics - - Micro-Based Behavioral Economics - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making
    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth

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