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Condorcet loser criterion
From Wikipedia, the free encyclopedia
Given a vote where voters rank options in order of preference, a Condorcet loser is an option that loses all of its pairwise comparisons.
In other words, when faced with a choice between the Condorcet loser L and any other option O, the number of voters who prefer O to L is greater than the number of voters who prefer L to O.
Voting systems that never choose a Condorcet loser pass the Condorcet loser criterion.
Instant runoff voting, Borda count, Schulze method, and ranked pairs pass the Condorcet loser criterion.
Plurality voting, approval voting, range voting, minimax, and Bucklin voting fail the Condorcet loser criterion.
- Electoral methods: standards and criteria by Blake Cretney
- Voting methods: definitions and criteria by James Green-Armytage
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