Teams Take the Better Risks
AbstractMany important economic and political decisions are made by teams. In the economic literature, however, the decision units are frequently modeled as individual economic agents. The paper experimentally investigates the question to what extent observed team decisions under risk are actually consistent with the principles of rational choice, specifically the principles of Expected Utility Theory (EUT) and of Portfolio Selection Theory (PST). The experiment is performed with individuals and teams. We find almost no evidence for the greater compliance of team decisions than of individual decisions with the principles of EUT. However, there is substantial evidence for the consistency of team decisions with the PST. Compared to individuals, teams accumulate significantly more expected value at a significantly lower total risk (measured in SD). We introduce a team decision algorithm, excess-risk vetoing , that combines simple majority voting with the right to veto alternatives providing additional risk that is not compensated by additional expected value. We find that the results of our experiment are well explained by the excess-risk vetoing.
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Bibliographic InfoPaper provided by University of Bonn, Germany in its series Discussion Paper Serie B with number 452.
Date of creation: Mar 1999
Date of revision:
Contact details of provider:
Postal: Bonn Graduate School of Economics, University of Bonn, Adenauerallee 24 - 26, 53113 Bonn, Germany
Fax: +49 228 73 6884
Web page: http://www.bgse.uni-bonn.de
Decision under Risk; Group Decision; Expected Utility; Portfolio Selection;
Other versions of this item:
- C91 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Individual Behavior
- C92 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Group Behavior
- D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
- D70 - Microeconomics - - Analysis of Collective Decision-Making - - - General
- M10 - Business Administration and Business Economics; Marketing; Accounting - - Business Administration - - - General
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