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Droop quota: Difference between revisions
Cleaned up article a little bit. The current summary out of w:Droop quota should probably be copied into this article, and then the prose shuffled a bit
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(Cleaned up article a little bit. The current summary out of w:Droop quota should probably be copied into this article, and then the prose shuffled a bit) |
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{{wikipedia|Droop quota}}▼
Today the Droop quota is used in almost all STV elections, including the forms of STV used in [[India]], the [[Republic of Ireland]], [[Northern Ireland]], [[Malta]] and [[Australia]], among other places. The Droop quota is very similar to the simpler [[Hagenbach-Bischoff quota]], which is also sometimes loosely referred to as the 'Droop quota'.▼
== Calculation ==
▲{{wikipedia|Droop quota}}
Sources differ as to the exact formula for the Droop quota. As used in the Republic of Ireland the formula is usually written:
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When there are 5 seats to be filled and 100 votes cast, the Droop quota is '''17''' votes, which is calculated as: Integer((100/(5+1)) + 1) = Integer((100/6) + 1) = Integer(~16.667 + 1) = Integer(~17.667) = '''17''' votes.
In the single-winner case, a Droop quota is a majority. In general, Droop quota-based methods tend to leave at least just under a Droop quota unrepresented. See the [[utility]] article, as the debate between Hare and Droop quotas somewhat parallels and generalizes the [[utilitarianism]] vs. [[majority rule]] debate.
▲<blockquote>The '''Droop quota''' is the quota most commonly used in elections held under the [[single transferable vote]] (STV) system. It is also sometimes used in elections held under the [[largest remainder method]] of [[party-list proportional representation]] (list PR). In an STV election the quota is the minimum number of votes a candidate must receive in order to be elected. Any votes a candidate receives above the quota are transferred to another candidate. The Droop quota was devised in 1868 by the English lawyer and mathematician [[Henry Richmond Droop]] (1831–1884) as a replacement for the earlier [[Hare quota]].
▲Today the Droop quota is used in almost all STV elections, including the forms of STV used in [[India]], the [[Republic of Ireland]], [[Northern Ireland]], [[Malta]] and [[Australia]], among other places. The Droop quota is very similar to the simpler [[Hagenbach-Bischoff quota]], which is also sometimes loosely referred to as the 'Droop quota'.
[[Category:Electoral system quotas]]
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