IDEAS home Printed from
MyIDEAS: Log in (now much improved!) to save this paper

Which Voting Rules Elicit Informative Voting?

Listed author(s):
  • Ruth Ben-Yashar


    (Department of Economics, Bar Ilan University)

  • Igal Milchtaich


    (Department of Economics, Bar Ilan University)

Registered author(s):

    When 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 question of strategic voting arises. That is, depending on the voting rule used to determine the collective decision, it may or may not be rational for group members to always vote for the alternative believe to be their private information indicates is better (i.e., vote informatively). In fact, we show in this paper that, if a qualified majority rule is used, then informative voting is rational only if the rule is optimal in the class of all qualified majority rules, in the sense the sense that, when everybody votes informatively, none of the other rules in this class would yield a higher expected utility. However, this necessary condition is not sufficient for informative voting to be rational. Specifically, even if the qualified majority rule used is optimal in the above sense, some of those who are least competent in correctly identifying the better alternative may increase the expected utility by sometimes voting for the alternative they believe to be inferior. A sufficient (but not necessary) condition for informative, non-strategic, voting to be rational is that the voting rule is optimal among the class of all qualified weighted majority rules, i.e., rules assigning (potentially) unequal weights to different individuals, this cannot happen: informative, non-strategic voting is rational.

    If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.

    File URL:
    File Function: Working paper
    Download Restriction: no

    Paper provided by Bar-Ilan University, Department of Economics in its series Working Papers with number 2002-13.

    in new window

    Date of creation: May 2002
    Handle: RePEc:biu:wpaper:2002-13
    Contact details of provider: Postal:
    Faculty of Social Sciences, Bar Ilan University 52900 Ramat-Gan

    Phone: Phone: +972-3-5318345
    Fax: +972-3-7384034
    Web page:

    More information through EDIRC

    References listed on IDEAS
    Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:

    in new window

    1. 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.
    Full references (including those not matched with items on IDEAS)

    This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

    When requesting a correction, please mention this item's handle: RePEc:biu:wpaper:2002-13. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Department of Economics)

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If references are entirely missing, you can add them using this form.

    If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    This information is provided to you by IDEAS at the Research Division of the Federal Reserve Bank of St. Louis using RePEc data.