Ranked Choice Including Pairwise Elimination: Difference between revisions
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'''Ranked Choice Including Pairwise Elimination''' (abbreviated as '''RCIPE''' which is pronounced "recipe") is an election vote-counting method that uses ranked ballots and eliminates '''pairwise losing candidates''' ([[Condorcet loser criterion|Condorcet losers]]) when they occur, and otherwise eliminates the candidate who currently has the smallest top-choice count. |
'''Ranked Choice Including Pairwise Elimination''' (abbreviated as '''RCIPE''' which is pronounced "recipe") is an election vote-counting method that uses ranked ballots and eliminates '''pairwise losing candidates''' (elimination-round-specific [[Condorcet loser criterion|Condorcet losers]]) when they occur, and otherwise eliminates the candidate who currently has the smallest top-choice count. |
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This method modifies [[Instant-Runoff Voting|instant runoff voting]] (IRV) by adding the elimination of |
This method modifies [[Instant-Runoff Voting|instant runoff voting]] (IRV) by adding the elimination of pairwise losing candidates. This addition reduces the failure rate for the [[Independence of irrelevant alternatives|Independence of Irrelevant Alternatives]] (IIA), which is the kind of failure that occurred in the [https://en.wikipedia.org/wiki/2009_Burlington_mayoral_election 2009 mayoral election in Burlington, Vermont]. This check for pairwise losing candidates considers all the marks on all the ballots, which contrasts with IRV, which does not consider all the marks on all the ballots. |
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This method further modifies simple IRV by specifying how to handle ballots on which the voter has marked more than one candidate at the same ranking level. |
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The RCIPE STV method extends the single-winner RCIPE method to fill multiple equivalent seats. |
The RCIPE STV method extends the single-winner RCIPE method to fill multiple equivalent seats. |