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Party-list proportional representation

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Title: Party-list proportional representation  
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Subject: Table of voting systems by country, Parallel voting, David Garrett (politician), Proportional representation, Hong Kong legislative election, 2012
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Party-list proportional representation

Poster for the European Parliament election 2004 in Italy, showing party lists

Party-list proportional representation systems are a family of voting systems emphasizing proportional representation (PR) in elections in which multiple candidates are elected (e.g. elections to parliament) through allocations to an electoral list. They can also be used as part of mixed additional member systems.

In these systems, parties make lists of candidates to be elected, and seats get allocated to each party in proportion to the number of votes the party receives. Voters may vote directly for the party, as in Albania, Argentina, Turkey, and Israel; or for candidates whose vote total will pool to the party, as in Brazil and the Netherlands; or for a list of candidates, as in Hong Kong.

The order in which a party's list candidates get elected may be pre-determined by some method internal to the party or the candidates (a closed list system) or it may be determined by the voters at large (an open list system) or by districts (a local list system).

Many variations on seat allocation within party-list proportional representation exist. The two most common are:

List proportional representation may also be combined in various hybrids, e.g. using the additional member system.

List of main apportionment methods (most proportional to least proportional):[1]

While the allocation formula is important, equally important is the district magnitude (number of seats in a constituency). The higher the district magnitude, the more proportional an electoral system becomes - the most proportional being when there is no division into constituencies at all and the entire country is treated as a single constituency. More, in some countries the electoral system works on two levels: at-large for parties, and in constituencies for candidates, with local party-lists seen as fractions of general, national lists. In this case, magnitude of local constituencies is irrelevant, seat apportionment being calculated at national level.

See also

References

  1. ^ http://polmeth.wustl.edu/analysis/vol/8/PA84-381-388.pdf

External links

  • Advantages and disadvantages of List PR - from the ACE Project
  • Open, Closed and Free Lists - from the ACE Project
  • Handbook of Electoral System Choice
  • Apportionment, or How to Round Seat Numbers
  • Glossary of Electoral Formulas
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