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Definite Majority Choice: Difference between revisions

Merge Pairwise Sorted Approval
(Update link to Rob LeGrand's online voting calculator)
(Merge Pairwise Sorted Approval)
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See also [[Proposed Statutory Rules for DMC]].
 
It can be extended to use [[Range voting]] instead of [[Approval voting]] as its base: in that case, the method eliminates the least-rated candidate.
It can be thought of as a rated version of [[Benham's method]].
 
Its elimination logic is the same as [[Benham's method]], and the method can thus be thought of as a rated version of it.
 
== [[Range voting]] implementation ==
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== Alternative implementation ==
 
This implementation is called '''Pairwise Sorted Approval'''. It is the simplest of a class of [[Pairwise Sorted Methods]].
 
A voter ranks candidates, and specifies approval, either by using an [[Approval Cutoff]] or by ranking above and below a fixed approval cutoff rank.
 
To determine the winner,
# sort candidates in descending order of approval.
# For each candidate, move it higher in the list as long as it pairwise beats the next-higher candidate, and only after all candidates above it have moved upward as far as they can.
 
This procedure can be used to produce a social ordering. It finds the same winner as the Benham-form implementation.
 
== Properties ==
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== Background ==
The name "DMC" was first suggested [http://lists.electorama.com/pipermail/election-methods-electorama.com/2005-March/015164.html here]. Equivalent methods have been suggested several times on the EM mailing list:
* The [[Pairwise Sorted Approval]] equivalentmethod/implementation was first proposed by Forest Simmons in [http://lists.electorama.com/pipermail/election-methods-electorama.com/2001-March/005448.html March 2001].
* The Ranked Approval Voting equivalentmethod/implementation was first proposed by Kevin Venzke in [http://lists.electorama.com/pipermail/election-methods-electorama.com/2003-September/010799.html September 2003]. The name was suggested by Russ Paielli in 2005.
 
The [http://lists.electorama.com/pipermail/election-methods-electorama.com/2005-March/015144.html philosophical basis] of DMC is to eliminate candidates that the voters strongly agree should ''not'' win, using two strong measures, and choose the undefeated candidate from those remaining.
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