Summary
We analyze a formal model of decision-making by a deliberative committee. There is a given binary agenda. Individuals evaluate the two alternatives on both private and common interest grounds. Each individual has two sorts of private information going into committee: (a) perfect information about their personal bias and (b) noisy information about which alternative is best with respect to a (commonly held) normative criterion. Prior to a committee vote to choose an alternative, committee members engage in deliberation, modeled as a simultaneous cheap-talk game. We explore and compare equilibrium properties under majority and unanimity voting rules, paying particular attention to the character of debate (who influences who and how) and quality of the decision in each instance. On balance, majority rule induces more information sharing and fewer decision-making errors than unanimity. Furthermore, the influence and character of deliberation per se can vary more under majority rule than under unanimity.
Jeff Banks was a coauthor of one of us, a teacher of the other, and a friend to both. This paper is for him.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Aragones, E., I. Gilboa, A. Postlewaite and D. Schmeidler (2001) Rhetoric and analogies. Mimeo. University of Pennsylvania.
Austen-Smith, D. (1990) Information transmission in debate. American Journal of Political Science, 34: 124–152.
Austen-Smith, D. (1990) Credible debate equilibria. Social Choice and Welfare, 7: 75–93.
Austen-Smith, D. (1993) Interested experts and policy advice: multiple referrals under open rule. Games and Economic Behavior, 5: 3–43.
Austen-Smith, D. (1993) Information acquisition and orthogonal argument. In W. Barnett, M. Hinich and N. Schofield (eds) Political Economy: Institutions, Competition and Representation Cambridge: CUP.
Battaglini, M. (2002) Multiple referrals and multidimensional cheap talk. Econometrica, 70: 1379–1402.
Bohman, J. and W. Rehg (eds) (1997) Deliberative Democracy: Essays on Reason and Politics Cambridge MA: MIT Press.
Calvert, R. and J. Johnson (1998) Rational argument, political argument and democratic deliberation. Mimeo. Washington University, St. Louis.
Christiano, T. (1997) The significance of public deliberation. In J. Bohman and W. Rehg (eds) Deliberative Democracy Cambridge MA: MIT Press.
Cohen, J. (1989) Deliberation and democratic legitimacy. In A. Hamlin and P. Pettit (eds) The Good Polity Oxford: Basil Blackwell.
Coughlan, P. (2001) In defense of unanimous jury verdicts: mistrials, communication and strategic voting. American Political Science Review, 94: 375–93.
Diermeier, D. and T. Feddersen (2000) Information and congressional hearings. American Journal of Political Science, 44: 51–65.
Doraszelski, U., D. Gerardi and F. Squintani (2001) Communication and voting with double-sided information. Mimeo. Northwestern University.
Dryzek, J. and C. List (2003) Social choice theory and deliberative democracy: a reconciliation. British Journal of Political Science, 33: 1–28.
Duggan, J. and C. Martinelli (2001) A Bayesian model of voting in juries. Games and Economic Behavior, 37: 259–94.
Elster, J. (ed) (2000) Deliberative Democracy Cambridge: CUP.
Elster, J. (1986) The market and the forum. In J. Elster and A. Hylland (eds) Foundations of Social Choice Theory Cambridge: CUP [reprinted in J. Bohman and W. Rehg (eds) 1997: 3–33].
Eriksen, E. (2001) Democratic or technocratic governance? Mimeo. NYU School of Law.
Farrell, J. (1987) Cheap talk, coordination and entry. RAND Journal of Economics, 18: 34–39.
Farrell, J. (1983) Meaning and credibility in cheap talk games. Games and Economic Behavior, 5: 514–31.
Feddersen, T. and W. Pesendorfer (1996) The swing voter’s curse. American Economic Review, 86: 408–24.
Feddersen, T. and W. Pesendorfer (1997) Voting behavior and information aggregation in elections with private information. Econometrica, 65: 1029–1058.
Gerardi, D. and L. Yariv (2002) Putting your ballot where your mouth is-an analysis of collective choice with communication. Mimeo. Yale University.
Glazer, J. and A. Rubinstein (2001) Debates and decisions: on a rationale of argumentation rules. Games and Economic Behavior, 36: 158–173.
Hafer, C. and D. Landa. (2003) Deliberation as self-discovery. Mimeo. New York University.
Karni, E. and Z. Safra (2002) Individual sense of justice: a utility representation. Econometrica, 70: 263–284.
Knight, J. and J. Johnson (1997) What sort of equality does deliberative democracy require? In J. Bohman and W. Rehg (eds) Deliberative Democracy Cambridge MA: MIT Press.
Krishna, V and J. Morgan (2001) A model of expertise. Quarterly Journal of Economics, 116: 747–75.
Ladha, K. (1992) The Condorcet jury theorem, free speech and correlated votes. American Journal of Political Science, 36: 617–634.
Lipman, B. and D. Seppi (1995) Robust inference in communication games with partial provability. Journal of Economic Theory, 66: 370–405.
Matthews, S. and A. Postlewaite (1995) On modeling cheap talk in Bayesian games. In J. Ledyard (ed) The Economics of Informational Decentralization: Complexity, Efficiency and Stability Amsterdam: Kluwer Nijhoff.
McLean, I. and F. Hewitt (1994) Condorcet: Foundations of Social Choice and Political Theory Aldershot: Edward Elgar Publishing.
McLennan, A. (1998) Consequences of the Condorcet jury theorem for beneficial information aggregation by rational players. American Political Science Review, 92: 413–418.
Meirowitz, A. (2004) In defense of exclusionary deliberation: communication and voting with private beliefs and values. Mimeo. Princeton University.
Ottaviani, M. and P. Sorensen (2001) Information aggregation in debate: who should speak first? Journal of Public Economics, 81: 393–422.
Rabin, M. (1994) A model of pregame communication. Journal of Economic Theory, 63: 370–391.
Sanders, L. (1997) Against deliberation. Political Theory, 25: 347–376.
Shapiro, I. (2000) Optimal deliberation. Mimeo. Yale University.
Walker, J. and D. Lane (1994) The jury system. Victorian Council for Civil Liberties, Criminal Justice DP 25/02/94.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2005 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Austen-Smith, D., Feddersen, T. (2005). Deliberation and Voting Rules. In: Austen-Smith, D., Duggan, J. (eds) Social Choice and Strategic Decisions. Studies in Choice and Welfare. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-27295-X_11
Download citation
DOI: https://doi.org/10.1007/3-540-27295-X_11
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-22053-4
Online ISBN: 978-3-540-27295-3
eBook Packages: Business and EconomicsEconomics and Finance (R0)