Condorcet with dual dropping is a Condorcet method that determines the social order (ranking of candidates) by Schulze and Ranked pairs, and returns the social order with the smallest Kemeny distance.
It passes the Smith criterion.
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Example[edit | edit source]
This example is due to Adam Tarr:
7: A > D > C > B 5: C > B > D > A 3: B > D > C > A 3: A > B > D > C 3: B > A > C > D 1: D > C > B > A
The Ranked Pairs outcome is B>A>D>C while the Schulze outcome is A>B>D>C. Of these, the Ranked Pairs order overturns one more voter than the Schulze order, so A is the winner.
References[edit | edit source]
- Matt G. (2002-09-10). "Dual Dropping method and "Preference Approval" ballot ideas".
- Matt G. "Preference Voting Tabulation Perl Script". SourceForge. Retrieved 2022-04-23.
- Adam Tarr (2002-09-10). "Dual Dropping method and "Preference Approval" ballot ideas".