Multi-stage voting, sequential elimination and Condorcet consistency
نویسندگان
چکیده
A class of voting procedures based on repeated ballots and elimination of one candidate in each round is shown to always induce an outcome in the top cycle and is thus Condorcet consistent, when voters behave strategically. This is an important class as it covers multi-stage, sequential elimination extensions of all standard one-shot voting rules (with the exception of negative voting), the same one-shot rules that would fail Condorcet consistency. The necessity of repeated ballots and sequential elimination are demonstrated by further showing that Condorcet consistency would fail in all standard voting rules that violate one or both of these conditions. JEL Classification: P16; D71; C72
منابع مشابه
Center for the Study of Rationality
A class of voting procedures based on repeated ballots and elimination of one candidate in each round is shown to always induce an outcome in the top cycle and is thus Condorcet consistent, when voters behave strategically. This is an important class as it covers multi-stage, sequential elimination extensions of all standard one-shot voting rules (with the exception of negative voting), the sam...
متن کاملSequential Elimination vs. Instantaneous Voting
Voting procedures eliminating candidates sequentially and one-at-a-time based on repeated ballots are superior to well-known single-round voting rules: if voters are strategic the former will induce the Condorcet winner in unique equilibrium, whereas the latter may fail to select it. In addition, when there is no Condorcet winner the outcome of sequential elimination voting always belongs to th...
متن کاملPositional rules and q-Condorcet consistency
A well-known result in Social Choice theory is the following: every scoring rule (positional rules) violates Condorcet consistency. A rule is Condorcet consistent when it selects the alternative that is preferred to every other alternative by a majority of individuals. In this paper, we investigate some limits of this negative result. We expose the relationship between a weaker version of the C...
متن کاملCondorcet Consistency of Approval Voting: a Counter Example in Large Poisson Games
Approval Voting is analyzed in a context of large elections with strategic voters: the Myerson’s Large Poisson Games. We first establish the Magnitude Equivalence Theorem which substantially reduces the complexity of computing the magnitudes of the pivot outcomes. Furthermore, we show that the Condorcet Winner need not be the Winner of the election in equilibrium under Approval Voting. Indeed, ...
متن کاملDivision of the Humanities and Social Sciences California Institute of Technology Pasadena, California 91125 Some Properties of Hare Voting with Strategic Voters
This essay examines some properties of the Single Transferable Vote (Hare Voting) procedure for electing candidates in multi-member districts under the assumption that all voters are strategic. From the perspective of the most common criterion for evaluating voting procedures the extent to which they ensure the eventual selection of Condorcet winning candidates the results we offer in this essa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- J. Economic Theory
دوره 144 شماره
صفحات -
تاریخ انتشار 2009