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Exhausted ballot: Difference between revisions
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(Copied #Results section from "2009 Burlington mayoral election" article (revision: https://electowiki.org/w/index.php?title=2009_Burlington_mayoral_election&oldid=17080 )) |
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== Example ==
{{main|2009 Burlington mayoral election}}
Voters in an STV elections such the "[[Instant-runoff voting|instant-runoff voting (IRV)]]" elections (or "ranked-choice voting (RCV)" elections) held in [[W:Burlington, Vermont|Burlington, Vermont]] a few years ago rank candidates on a [[Ranked voting systems|preferential ballot]].<ref>Quoting [[w:Issues affecting the single transferable vote]]
https://en.wikipedia.org/w/index.php?title=Issues_affecting_the_single_transferable_vote&oldid=1137726277</ref> The city of held a second mayoral election using instant-runoff voting on March 3, 2009, which was the second mayoral election since the city's 2005 approval of [[instant-runoff voting]] (IRV).<ref name="burlington_votes">[http://www.burlingtonvotes.org/faq 4. How did this change to IRV come about?] ''Over 64% of Burlington voters voted in favor of the IRV Charter amendment in March, 2005, and it went into effect on May 12, 2005, when the governor signed the ratification bill, H.505, which had been passed by both the House and Senate.''</ref> A candidate from the [[Vermont Progressive Party]] (Bob Kiss) had won the first election under the system in 2006. In 2009, he was running for reelection.<ref>{{cite web|url=http://www.ci.burlington.vt.us/mayor/|title=Mayor Bob Kiss|website=City of Burlington|url-status=dead|archive-url=https://web.archive.org/web/20071129081028/http://www.ci.burlington.vt.us/mayor/|archive-date=2007-11-29|access-date=2007-11-16}}</ref> The official results of the 2009 election were as follows:<ref>{{Cite web|url=http://www.burlingtonvotes.org/20090303/2009%20Burlington%20Mayor%20Round.htm|title=ChoicePlus Pro 2009 Burlington Mayor Round Detail Report|date=2011-07-25|archive-url=https://web.archive.org/web/20110725111725/http://www.burlingtonvotes.org/20090303/2009%20Burlington%20Mayor%20Round.htm|archive-date=2011-07-25|access-date=2018-01-03}}</ref><ref>{{cite web|url=http://www.burlingtonvotes.org/20090303/2009%20Burlington%20Mayor%20Round4.htm|title=ChoicePlus Pro 2009 Burlington Mayor Round 4 Report|date=March 3, 2009|archive-url=https://web.archive.org/web/20110725111051/http://www.burlingtonvotes.org/20090303/2009%20Burlington%20Mayor%20Round4.htm|archive-date=2011-07-25|url-status=dead|access-date=2011-02-28}}</ref>
===First round===
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▲As seen above, voters in an STV election rank candidates on a [[Ranked voting systems|preferential ballot]]. STV systems in use in different countries vary both as to ballot design and to whether or not voters are obliged to provide a full list of preferences. In jurisdictions such as the [[Republic of Ireland]] and [[Northern Ireland]] voters are permitted to rank as many or as few candidates as they wish. Consequently, voters sometimes, for example, rank only the candidates of a single party, or of their most preferred parties. A minority of voters, especially if they do not fully understand the system, might even "bullet vote", only expressing a first preference. Allowing voters to rank only as many candidates as they wish grants them greater freedom, but can also lead to some voters ranking so few candidates that their vote eventually becomes "exhausted"; that is, at a certain point during the count it can no longer be transferred and therefore loses an opportunity to influence the result. (In [[First Past the Post]] elections, many, sometimes most, votes are disregarded, as there is no opportunity to mark back-up preferences. To the extent that voters mark back-up preferences and the back-up preferences consulted - many are not consulted even if marked - the portion of votes ignored under STV is less than under First Past The Post. Back-up preferences are not consulted if the vote is cast at the start for a candidate who wins in the end as the last seat is filled, or cast for a candidate who is eliminated at the end. They are also not used if they are marked for a candidate who has already been elected or eliminated.)
=Ballot exhaustion in RCV=
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