Quick Runoff: Difference between revisions
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capitalization: Independence of clones
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QR satisfies [[Later-no-harm]] because if candidate X is elected, the addition of a lower preference can only cause X to lose if it creates a majority defeat of X by the candidate that follows X in descending first preference order. This cannot be done by a voter who prefers X to the new preference.
QR fails [[Mono-raise|monotonicity]] ([[Mono-raise]] and [[Mono-add-top]] at least) and is not [[Independence of
QR also doesn't satisfy [[Later-no-help]]. In particular, in a three candidate scenario where A has the most first preferences and C the fewest, C may have incentive to insincerely create a majority win for B over A, if the C voters believe C has the second-preferences of the A voters. So, while the A voters technically have both Later-no-harm and Later-no-help guarantees with respect to A, there may be an incentive to withhold their second preference if they feel other factions are relying on those second preferences in order to try to steal the race from A.
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