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The Alternative Vote Plus (AV+), or Alternative Vote Top-up, is a semi-proportional voting system. AV+ was devised by the 1998 Jenkins Commission which first proposed the idea as a system that could be used for elections to the Parliament of the United Kingdom.〔(【引用サイトリンク】title=Report of the Independent Commission on the Voting System )〕 As the name suggests, AV+ is an additional member system which works in two parts: the 'AV' part and the 'plus' part. As in the Alternative Vote Instant-runoff voting system, candidates are ranked numerically in order of preference. The important difference is that an additional group of members would be elected through the regional party lists system to ensure proportionality; in typical proposals, these members are 15–20% of the whole body. More specifically, each voter would get a second vote to elect a county or regional-level representative from a list of candidates of more than one person per party. The number of votes cast in this vote would decide how many representatives from that county or region would go on to parliament. ==Advantages== * Would require relatively minor modifications to existing system, and maintain single-member constituencies. * Would lead to a more proportional result than First Past the Post (FPTP) or AV, but would still give a built-in advantage to the largest party and allow one-party rule during landslide years. * Would lessen the problems of 'split voting' and the necessity of tactical voting. * Coalition governments, which include the opinions of multiple movements of the people, are more likely. * Decreases the chances of 'safe seats' and MPs holding seats for life. * MPs will have to secure 50% of votes to win a constituency seat - making them more accountable and working harder to win over a broader appeal. * Limits the chances for extremists to gain power scraping in with minority support. AV+ shuts down the ability for candidates to slip in with just a minority of the votes. 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「Alternative vote Plus」の詳細全文を読む スポンサード リンク
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