Pairwise counting: Difference between revisions
→Negative vote-counting approach
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It is not necessary to mark that a voter ranked a candidate if they ranked that candidate as their last choice, because this means they wouldn't vote for that candidate in any matchups. This advice is less relevant when write-ins are allowed, however, because even if a voter ranks a candidate last among the candidates named on their ballot, they are still implicitly ranking that candidate above all write-in candidates they didn't rank on their ballot.
=== Using with strength of preference ===
Negative vote-counting can be used to count weak pairwise preferences (i.e. if a voter only wants to give 0.4 votes in a matchup; see [[Rated pairwise preference ballot#Implementations]]) by counting only a "partial ballot" marking a candidate, and partial (i.e. weighted or fractional) negative votes in certain matchups.
==References==
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