Plurality-at-large Voting - Variations of Block Voting

Variations of Block Voting

Partial block voting, also called limited voting, functions similarly to plurality-at-large voting, however in partial block voting each voter receives fewer votes than the number of candidates to be elected. This in turn can enable reasonably sized minorities to achieve some representation, as it becomes impossible for a simple plurality to sweep every seat. Partial bloc voting is used for elections to the Gibraltar Parliament, where each voter has 10 votes and 17 seats are open for election; the usual result is that the most popular party wins 10 seats and forms the ruling administration, while the second most popular wins 7 seats and forms the opposition. Partial block voting is also used in the Spanish Senate, where there are 4 seats and each voter receives 3 votes. Historically, partial block voting was used in three- and four-member constituencies in the United Kingdom, where voters received two votes, until multimember constituencies were abolished.

Under partial block voting, the fewer votes each voter is granted the smaller the number of voters needed to win becomes and the more like proportional representation the results can be, provided that voters and candidates use proper strategy. At the extreme, if each voter receives only one vote, then the voting system becomes equivalent to the single non-transferable vote and the minimum proportion needed is the Droop quota.

Block voting, or plurality block voting, is often compared with preferential block voting as both systems tend to produce landslide victories for similar candidates. Instead of a series of checkboxes, preferential block voting uses a preferential ballot. A slate of clones of the top preferred candidate will win every seat under both systems, however in preferential block voting this is instead the instant-runoff winner.

The party block voting, or general ticket, is the party-list version of the bloc vote. If in the classic BV the candidates formally stand as non-partisan and some minority nominations can be theoretically successful, in the PVB each candidate are linked to his party-list, which is voted by the electors producing a landslide, and any minority representation is excluded. So, the full at-large PVB is considered completely anti-democratic, and it is used only to elect portions of assembly.

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