Theory and Decision

, Volume 43, Issue 3, pp 209–218 | Cite as

Order relations among efficient decision rules

  • Jacob Paroush


The paper introduces the concept of polar decision rules and establishes that majority rules are polar rules. We identify second best rules and penultimate rules in cases that majority rules are optimal or the most inferior, respectively. We especially specify the almost expert rule and the almost majority rule as the secondary rules of the expert and majority rules, respectively.

Order relations decision rules polar rules 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Berend, D. and Harmse, J.E.: 1993, ‘Expert Rule Versus Majority Rule under Partial Information’, Theory and Decision 35, 179-197.Google Scholar
  2. Nitzan, S. and Paroush, J.: 1982, ‘Optimal Decision Rules in Uncertain Dichotomous Choice Situation’, International Economic Review 23, 289-297.Google Scholar
  3. Nitzan, S. and Paroush, J.: 1985, Collective Decision Making: An Economic Outlook, Cambridge: University Press.Google Scholar
  4. Karotkin, D.: 1986, ‘Economic aspects of collective decision making under uncertainty’, Ph.D. Thesis, Bar-Ilan University.Google Scholar
  5. Karotkin, D.: 1993, ‘Inferiority of Restricted majority Decision Rules’, Public Choice 77, 249-258.Google Scholar
  6. Karotkin, D., Nitzan, S., and Paroush, J.: 1988, ‘The Essential Ranking of Decision Rules in Small Panels of Experts’, Theory and Decision 24, 243-268.Google Scholar
  7. Karotkin, D. and Paroush, J.: 19XX, ‘Variability of Decision Ability and Essential Order of Decision Rules’, Journal of Economic Behavior and Organization 23, 343-354.Google Scholar
  8. Paroush, J.: 1990, ‘Multi-Choice Problems and the Essential Order among Decision Rules’, Economics Letters 32, 121-125.Google Scholar
  9. Shapley, L. and Grofman, B.: 1984, ‘Optimizing Group Judgemental Accuracy in the Presence of Independencies’, Public Choice 43, 329-343.Google Scholar

Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Jacob Paroush
    • 1
  1. 1.Department of EconomicsBar-Ilan UniversityIsrael

Personalised recommendations