Central Banking by Committee
There is a small, but growing, economics literature on the importance and effects of having monetary policy made by a committee, rather than by an individual. Complimenting this is an older and larger body of literature on groups in the other social sciences, particular in social psychology. This paper provides a review of some of this work, focusing on two important features of committees: the effect of their size on performance and whether or not they are more moderate than the members who make them up. Individual members of a committee acquire idiosyncratic information which the committee uses to make a decision. A result of the famous Condorcet Jury Theorem is that larger committees have more resources, in the form of more information, and are thus better than smaller ones. This result depends on individuals being willing to work as hard at gathering information when they are members of a committee as they would be willing to work if they were acting alone. The economics literature suggests that this may not hold; that individual members may have an incentive to shirk. This phenomenon of a member withholding effort is called social loading in the social pyschology literature. Studies stretching over 125 years document its existence and suggest that it becomes more important as committee size increases and that it disappears when individual members contributions can be identified and evaluated. The Condorcet Jury Theorem also depends on the committee being able to aggregate members information and on members being willing to truthfully reveal their information. An excessively formal meeting structure may cause the former to fail to hold; committee members with different objectives may cause the latter not to be true. As a result of shirking and coordination problems, smaller committees may be better than larger ones and the optimal size for a committee is an empirical issue. Committees pool members information and views, thus it seems that monetary policy made by a committee should be more moderate than monetary policy made by a single individual. However, several hundred studies demonstrate that belonging to a committee polarizes its members and, hence, committees may be more extreme than individuals. A particularly harmful form of group polarization occurs when committee members striving for consensus causes them to stop paying suffcient attention to alternative courses of action. In this case the committee may make terrible decisions that none of its members would have made on their own. The results of the literature on committee size and committee polarization suggest that the ideal monetary policy committee may not have many more than five members. It should have a well defined objective and it should publish the votes of its members. It should be structured so that members do not act as part of a group, perhaps by having short terms in office and members from outside the central bank. External scrutiny of the decision-making process should be encouraged.
|Date of creation:||Feb 2006|
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- Abhijit V. Banerjee, 1992. "A Simple Model of Herd Behavior," The Quarterly Journal of Economics, Oxford University Press, vol. 107(3), pages 797-817.
- Clare Lombardelli & James Proudman & James Talbot, 2002.
"Committees versus individuals: an experimental analysis of monetary policy decision-making,"
Bank of England working papers
165, Bank of England.
- Clare Lombardelli & James Proudman & James Talbot, 2005. "Committees Versus Individuals: An Experimental Analysis of Monetary Policy Decision-Making," International Journal of Central Banking, International Journal of Central Banking, vol. 1(1), May.
- Lombardelli, Clare & Proudman, James & Talbot, James, 2005. "Committees Versus Individuals: An Experimental Analysis of Monetary Policy Decision Making," MPRA Paper 823, University Library of Munich, Germany.
- Lombardelli, Clare & James Proudman & James Talbot, 2003. "Committees versus individuals: an experimental analysis of monetary policy decision-making," Royal Economic Society Annual Conference 2003 142, Royal Economic Society.
- Alan S. Blinder & John Morgan, 2001.
"Are Two Heads Better Than One?: An Experimental Analysis of Group vs. Individual Decisionmaking,"
130, Princeton University, Department of Economics, Center for Economic Policy Studies..
- Alan S. Blinder & John Morgan, 2000. "Are Two Heads Better Than One?: An Experimental Analysis of Group vs. Individual Decisionmaking," NBER Working Papers 7909, National Bureau of Economic Research, Inc.
- Drora Karotkin & Jacob Paroush, 2003. "Optimum committee size: Quality-versus-quantity dilemma," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 20(3), pages 429-441, 06.
- Ley, E. & Steel, M.F.J., 1995.
"A model of management teams,"
1995-86, Tilburg University, Center for Economic Research.
- Eduardo Ley & Mark F.J. Steel, 1995. "A Model of Management Teams," Others 9503001, EconWPA, revised 19 Jul 1995.
- Eduardo Ley & Mark F J Steel, 1995. "A Model of Management Teams," ESE Discussion Papers 24, Edinburgh School of Economics, University of Edinburgh.
- Ley, E. & Steel, M.FJ., 1995. "A Model of Management Teams," Papers 9586, Tilburg - Center for Economic Research.
- Hao Li & Sherwin Rosen & Wing Suen, 1999.
"Conflicts and Common Interests in Committees,"
NBER Working Papers
7158, National Bureau of Economic Research, Inc.
- Hao Li & Sherwin Rosen & Wing Suen, 2000. "Conflicts and Common Interests in Committees," Econometric Society World Congress 2000 Contributed Papers 0341, Econometric Society.
- Cason, Timothy N & Mui, Vai-Lam, 1997. "A Laboratory Study of Group Polarisation in the Team Dictator Game," Economic Journal, Royal Economic Society, vol. 107(444), pages 1465-83, September.
- Alan S. Blinder, 1999. "Central Banking in Theory and Practice," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262522608.
- Mathias Dewatripont & Ian Jewitt & Jean Tirole, 1999.
"The economics of career concerns: part 1 :comparing information structures,"
ULB Institutional Repository
2013/9617, ULB -- Universite Libre de Bruxelles.
- Mathias Dewatripont & Ian Jewitt & Jean Tirole, 1999. "The Economics of Career Concerns, Part I: Comparing Information Structures," Review of Economic Studies, Oxford University Press, vol. 66(1), pages 183-198.
- Akerlof, George A, 1991. "Procrastination and Obedience," American Economic Review, American Economic Association, vol. 81(2), pages 1-19, May.
- Sushil Bikhchandani & David Hirshleifer & Ivo Welch, 1998. "Learning from the Behavior of Others: Conformity, Fads, and Informational Cascades," Journal of Economic Perspectives, American Economic Association, vol. 12(3), pages 151-170, Summer.
- Gerlach-Kristen, Petra, 2005. "Too little, too late: Interest rate setting and the costs of consensus," Economics Letters, Elsevier, vol. 88(3), pages 376-381, September.
- Sah, Raaj Kumar & Stiglitz, Joseph E, 1988. "Committees, Hierarchies and Polyarchies," Economic Journal, Royal Economic Society, vol. 98(391), pages 451-70, June.
- Smith, Steve, 1985. "Groupthink and the Hostage Rescue Mission," British Journal of Political Science, Cambridge University Press, vol. 15(01), pages 117-123, January.
- Christopher J. Waller, 2000. "Policy Boards and Policy Smoothing," The Quarterly Journal of Economics, Oxford University Press, vol. 115(1), pages 305-339.
- Gerling, Kerstin & Gruner, Hans Peter & Kiel, Alexandra & Schulte, Elisabeth, 2005.
"Information acquisition and decision making in committees: A survey,"
European Journal of Political Economy,
Elsevier, vol. 21(3), pages 563-597, September.
- Kiel, Alexandra & Gerling, Kerstin & Schulte, Elisabeth & Grüner, Hans Peter, 2003. "Information acquisition and decision making in committees: a survey," Working Paper Series 0256, European Central Bank.
- Whyte, Glen, 1993. "Escalating Commitment in Individual and Group Decision Making: A Prospect Theory Approach," Organizational Behavior and Human Decision Processes, Elsevier, vol. 54(3), pages 430-455, April.
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