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First and Second Best Voting Rules in Committees

  • Ruth Ben-Yashar

    (Bar-Ilan University)

  • Igal Milchtaich

    (Bar-Ilan University)

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    A group of people with identical preferences but different abilities in identifying the best alternative (e.g., a jury) takes a vote to decide between two alternatives. The first best voting rule is a weighted voting rule that takes into account the different individual competences, and is therefore not anonymous. Under such a rule, it is rational for group members to vote informatively, i.e., according to their private information. The use of any (non-trivial) anonymous voting rule may provide an incentive for some group members to vote strategically, non-informatively. However, this paper shows that the identity of the best anonymous voting rule does not depend on whether or not they actually choose to do so; a single, second best, rule maximizes utility in both cases.

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    File URL: http://www.biu.ac.il/soc/ec/wp/8-03/8-03.pdf
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    Paper provided by Bar-Ilan University, Department of Economics in its series Working Papers with number 2003-08.

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    Date of creation: Oct 2003
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    Handle: RePEc:biu:wpaper:2003-08
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    Web page: http://www.biu.ac.il/soc/ec
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    1. Ruth Ben-Yashar & Sarit Kraus, 2002. "Optimal collective dichotomous choice under quota constraints," Economic Theory, Springer, vol. 19(4), pages 839-852.
    2. Karotkin, Drora & Paroush, Jacob, 1995. "Incentive schemes for investment in human capital by members of a team of decision makers," Labour Economics, Elsevier, vol. 2(1), pages 41-51, March.
    3. Hao Li & Sherwin Rosen & Wing Suen, 1999. "Conflicts and Common Interests in Committees," NBER Working Papers 7158, National Bureau of Economic Research, Inc.
    4. Sah, R.K., 1991. "Fallibility In Human Organizations And Political Systems," Papers 625, Yale - Economic Growth Center.
    5. Ben-Yashar, Ruth C & Nitzan, Shmuel I, 1997. "The Optimal Decision Rule for Fixed-Size Committees in Dichotomous Choice Situations: The General Result," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 38(1), pages 175-86, February.
    6. Nitzan, Shmuel & Paroush, Jacob, 1982. "Optimal Decision Rules in Uncertain Dichotomous Choice Situations," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 23(2), pages 289-97, June.
    7. Ben-Yashar, Ruth & Nitzan, Shmuel, 1998. "Quality and structure of organizational decision-making," Journal of Economic Behavior & Organization, Elsevier, vol. 36(4), pages 521-534, September.
    8. Lloyd Shapley & Bernard Grofman, 1984. "Optimizing group judgmental accuracy in the presence of interdependencies," Public Choice, Springer, vol. 43(3), pages 329-343, January.
    9. Ben-Yashar, Ruth & Khuller, Samir & Kraus, Sarit, 2001. "Optimal collective dichotomous choice under partial order constraints," Mathematical Social Sciences, Elsevier, vol. 41(3), pages 349-364, May.
    10. Duggan, John & Martinelli, Cesar, 2001. "A Bayesian Model of Voting in Juries," Games and Economic Behavior, Elsevier, vol. 37(2), pages 259-294, November.
    11. Roger B. Myerson, 1994. "Extended Poisson Games and the Condorcet Jury Theorem," Discussion Papers 1103, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
    12. Klevorick, Alvin K. & Rothschild, Michael & Winship, Christopher, 1984. "Information processing and jury decisionmaking," Journal of Public Economics, Elsevier, vol. 23(3), pages 245-278, April.
    13. Timothy Feddersen & Wolfgang Pesendorfer, 1997. "Voting Behavior and Information Aggregation in Elections with Private Information," Econometrica, Econometric Society, vol. 65(5), pages 1029-1058, September.
    14. Ruth Ben-Yashar & Jacob Paroush, 2001. "Optimal decision rules for fixed-size committees in polychotomous choice situations," Social Choice and Welfare, Springer, vol. 18(4), pages 737-746.
    15. Peleg, Bezalel, 2002. "Game-theoretic analysis of voting in committees," Handbook of Social Choice and Welfare, in: K. J. Arrow & A. K. Sen & K. Suzumura (ed.), Handbook of Social Choice and Welfare, edition 1, volume 1, chapter 8, pages 395-423 Elsevier.
    16. Nicola Persico, 2004. "Committee Design with Endogenous Information," Review of Economic Studies, Wiley Blackwell, vol. 71(1), pages 165-191, 01.
    17. Wit, Jorgen, 1998. "Rational Choice and the Condorcet Jury Theorem," Games and Economic Behavior, Elsevier, vol. 22(2), pages 364-376, February.
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