Dowdall system

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The Dowdall system is a preferential voting method in which voters rank candidates and each ranking is weighted by the reciprocal of its position, favoring broadly acceptable candidates over merely first-choice favorites.

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Dowdall system canonical 1

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Statements (33)

Predicate Object
instanceOf preferential voting system
ranked voting method
aggregationLevel candidate-level score totals across all ballots
alternativeName Dowdall method NERFINISHED
appliesTo multi-winner elections
single-winner elections
ballotType ordinal ranking
category positional scoring rule
designGoal favor broadly acceptable candidates
reduce dominance of mere first-choice favorites
differenceFromBordaCount uses reciprocal weights instead of linear weights
favoringProperty consensus candidates
field social choice theory
voting theory
firstPreferenceWeight 1
informationRequired complete or partial ranking of candidates
monotonicityProperty monotone under standard interpretations
normativeFeature dampens marginal value of lower preferences via decreasing weights
rewards lower-ranked but widely ranked candidates
nthPreferenceWeight 1/n
penalizingProperty polarizing candidates
relatedTo Borda count NERFINISHED
scoreAggregation sum of weighted preference scores
scoreComputation each voter contributes 1/k to candidate ranked k-th
secondPreferenceWeight 1/2
thirdPreferenceWeight 1/3
treatmentOfUnrankedCandidates typically receive zero points
uses cardinal-like scores derived from ordinal rankings
usesBallots ranked ballots
usesScoringVector (1, 1/2, 1/3, 1/4, ...) for successive ranks
voterAction ranks candidates in order of preference
weightingRule reciprocal of rank position
winnerCriterion candidate with highest total Dowdall score

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Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.

Parliament of Nauru votingSystem Dowdall system