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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Sequential proportional approval voting ： ウィキペディア英語版 Sequential proportional approval voting Sequential Proportional Approval Voting (SPAV) or Reweighted Approval Voting (RAV) is a voting system that extends the concept of Approval Voting to a multiple winner election. Proposed by Danish statistician Thorvald N. Thiele in the early 1900s,〔E. Phragmén (1899): "Till frågan om en proportionell valmetod." Statsvetenskaplig tidskrifts Vol. 2, No. 2: pp 87-95 ()〕 it was used (with adaptations for party lists) in Sweden for a short period after 1909.〔Aziz, H., Brill, M., Conitzer, V., et al. (2014): "Justified Representation in Approval-Based Committee Voting", arXiv:1407.8269 p5 ()〕 ==Description== This method converts AV into a multi-round rule, selecting a candidate in each round and then reweighing the approvals for the subsequent rounds. The first candidate elected is the AV winner (''w1''). The value of all ballots that approve of ''w1'' are reduced in value from 1 to 1/2 and the approval scores recalculated. Next, the unelected candidate who has the highest approval score is elected (''w2''). Then the value of ballots that approve of ''w1'' and ''w2'' are reduced in value to 1/3, and the value of all ballots that approve of either ''w1'' or ''w2'' but not both are reduced in value to 1/2.〔Steven J. Brams, D. Marc Kilgour (2009): "Satisfaction Approval Voting": p4 ()〕 At each stage, the unelected candidate with the highest approval score is elected. Then the value of each voter’s ballot is set at ''1/(1+m)'' where ''m'' is the number of candidates approved on that ballot who were already elected, until the required number of candidates is elected. The system disadvantages minority groups who share some preferences with the majority. In terms of tactical voting, it is therefore highly desirable to withhold approval from candidates who are likely to be elected in any case, as with cumulative voting and the single non-transferable vote. It is however a much computationally simpler algorithm than Proportional approval voting, permitting votes to be counted either by hand or by computer, rather than requiring a computer to determine the outcome of all but the simplest elections. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sequential proportional approval voting」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.