Favorite betrayal criterion

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The Favorite Betrayal criterion is a criterion for evaluating voting methods formulated by Mike Ossipoff. The criterion may be stated as, "There is no set of votes such that a given voter can improve (from his perspective) the outcome by raising his vote for someone over his favorite."

Approval voting, Range voting, and Minimax (pairwise opposition) comply with the favorite betrayal criterion. The Borda count, Bucklin voting, Plurality voting, IRV, and all Condorcet methods fail.

[edit] External links

• Survey of methods that avoid Favorite Betrayal
• Strategy Criteria by Mike Ossipoff
• Election Methods
• Survey of methods satisfying FBC
• FBC in relation to duopoly
• FBC used in mathematical proofs
• Commentary on FBC in relation to other voting methods
• Kevin Venzke's statement on FBC