Instant-runoff voting: Difference between revisions

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Federal elections are conducted by the Australian Electoral Commission, who employ all the workers at all the booths, to a common standard of neutrality and efficiency. Candidates may appoint scrutineers to watch (but not touch) what is going on.

== Notes ==

IRV always elects a Condorcet winner who receives at over [[Dominant mutual third|1/3rd]] of 1st choice votes. More generally, a candidate who at any point when they are uneliminated receives over 1/3rd of all active votes and [[Pairwise counting|pairwise beats]] (is preferred by more voters than) all other uneliminated candidates is guaranteed to win. This is because when all but two candidates are eliminated, the one preferred by more voters will win, and a candidate with over 1/3rd of active votes is guaranteed to be one of the final two remaining candidates, because at most any other two candidates can each get just under 1/3rd of the active votes, and therefore one of them will be eliminated before the over-1/3rd candidate.

Several variations of IRV have been proposed to meet the Condorcet and Smith criteria. The simplest of these are to eliminate everyone except the Condorcet winner (if they exist)/the candidates in the Smith Set, and then run IRV.

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==See also==

*[[Australian electoral system]]