Coexistence (electoral systems)

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In political science, the coexistence type of electoral systems (also called a hybrid system) means, that in the same election different voters vote using different systems, based on which electoral district they belong to. This is distinct from such mixed electoral systems that use parallel voting (superposition) or . [1] Some supermixed systems also use this principle. For example, the rural-urban proportional (RUP) proposal, which is a hybrid mixed system that uses two tiers: the lower tier uses a proportional system, like list-PR or STV, in urban regions, and the upper tier uses MMP (itself a mixed system) either in rural regions alone or in all regions. [2]

Coexistence of electoral systems exist in multiple countries, like the Democratic Republic of the Congo and Panama, as well as for elections of the European Parliament.

Types of coexistence

TypeSystemExample(s) for use
Coexistencee.g. FPTP/SMP in single-member districts, list-PR in multi-member districtsDemocratic Republic of the Congo, Panama
Supermixede.g. FPTP/SMP in single-member districts, conditional party block voting in multi-member districtsCameroon, Chad
Rural-urban proportional representation (RUP)Denmark (formerly), Iceland (formerly)[ citation needed ]

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Proportional representation (PR) refers to any type of electoral system under which subgroups of an electorate are reflected proportionately in the elected body. The concept applies mainly to political divisions among voters. The essence of such systems is that all votes cast – or almost all votes cast – contribute to the result and are effectively used to help elect someone. Under other election systems, a bare plurality or a scant majority are all that are used to elect candidates. Further, a PR system is one that produces mixed and balanced representation, reflecting how votes are cast.

<span class="mw-page-title-main">Additional-member system</span> Mixed electoral system with compensation

The additional-member system (AMS) or is a mixed electoral system under which most representatives are elected in single-member districts (SMDs), and a fixed number of other "additional members" are elected to make the seat distribution in the chamber more proportional to the way votes are cast for party lists. It is distinct from parallel voting in that the "additional member" seats are awarded to parties taking into account seats won in SMDs, which is not done under parallel voting.

<span class="mw-page-title-main">Mixed-member proportional representation</span> Type of mixed electoral system

Mixed-member proportional representation is a mixed electoral system which combines local winner-take-all elections with a compensatory tier of party list votes, which are used to allocate additional members in a way that aims to produce proportional representation overall. In typical MMP systems, voters get two votes: one to decide the representative for their single-seat constituency, and one for a political party. Some countries use single vote variants of MMP, although this article focuses primarily on dual vote versions of MMP.

In political science, parallelvoting or superposition refers to the use of two or more electoral systems to elect different members of a legislature. More precisely, an electoral system is a superposition if it is a mixture of at least two tiers, which do not interact with each other in any way; one part of a legislature is elected using one method, while another part is elected using a different method, with all voters participating in both. Thus, the final results can be found by calculating the results for each system separately based on the votes alone, then adding them together. A system is called fusion or majority bonus, another independent mixture of two system but without two tiers. Superposition is also not the same as "coexistence", which when different districts in the same election use different systems. Superposition, fusion and coexistence are distinct from dependent mixed electoral systems like compensatory (corrective) and conditional systems.

An electoral district, also known as an election district, legislative district, voting district, constituency, riding, ward, division, electorate, or (election) precinct, is a subdivision of a larger state created to provide its population with representation in the larger state's legislature. That body, or the state's constitution or a body established for that purpose, determines each district's boundaries and whether each will be represented by a single member or multiple members. Generally, only voters (constituents) who reside within the district are permitted to vote in an election held there. District representatives may be elected by a first-past-the-post system, a proportional representative system, or another voting method. They may be selected by a direct election under universal suffrage, an indirect election, or another form of suffrage.

<span class="mw-page-title-main">United Kingdom constituencies</span> Various types of electoral area in the UK

In the United Kingdom (UK), each of the electoral areas or divisions called constituencies elects one member to the House of Commons.

The majority bonus system (MBS), sometimes referred to as the reinforced proportionality electoral system is a semi-proportional method of election multiple representatives. The majority bonus is typically classified a mixed electoral system, as it integrates both the proportionality and winner-take-all principles to provide mixed-member majoritarian representation. An academic term for such a hybrid system is fusion, which means an independent combination of two systems in which the two formulas are mixed within the same district (the district in question may be a single, nationwide constituency). This makes it distinct from other mixed systems such as parallel voting (superposition) and coexistence. A majority bonus may also be one of the properties of a supermixed system.

Early parliamentary elections were held in Iceland on 25 and 26 October 1959. Following the electoral reforms made after the June elections, the Independence Party won 16 of the 40 seats in the Lower House of the Althing.

A winner-take-all electoral system is one where a voting bloc can win all seats in a legislature or electoral district, denying representation to any political minorities. Such systems are used in many major democracies. Such systems are sometimes called "majoritarian representation", though this term is a misnomer, as most such systems do not always elect majority preferred candidates and do not always produce winners who received majority of votes cast in the district, and they allow parties to take a majority of seats in the chamber with just a minority of the vote.

Scorporo is a partially compensatory, mixed-member majoritarian electoral system, sometimes referred to as a negative vote transfer system (NVT) whereby a portion of members are elected in single-member districts (SMDs) and a portion are elected from a list. It may be fully defined as a parallel voting system which excludes a portion of the SMD winners' votes in electing the proportional tier, to result in a more proportional outcome. The exclusion of a portion of the SMD winners' votes is what makes scorporo fundamentally different from parallel voting and somewhat closer to mixed-member proportional representation in theory. However, the design proved susceptible to the decoy list strategy, and as a result by 2001 had devolved into a de facto parallel voting system. The method is only known to have been used in Italy and for a portion of the compensatory tier of the National Assembly of Hungary.

Dual-member proportional representation (DMP), also known as dual-member mixed proportional, is an electoral system designed to produce proportional election results across a region by electing two representatives in each of the region’s districts. The first seat in every district is awarded to the candidate who receives the most votes, similar to first-past-the-post voting (FPTP). The second seat is awarded to one of the remaining district candidates so that proportionality is achieved across the region, using a calculation that aims to award parties their seats in the districts where they had their strongest performances.

<span class="mw-page-title-main">Mixed electoral system</span> Family of voting systems

A mixed electoral system or mixed-member electoral system combines methods of majoritarian and proportional representation (PR). The majoritarian component is usually first-past-the-post voting (FPTP/SMP), whereas the proportional component is most often based on party-list PR. The results of the combination may be mixed-member proportional (MMP), where the overall results of the elections are proportional, or mixed-member majoritarian, in which case the overall results are semi-proportional, retaining disproportionalities from the majoritarian component.

<span class="mw-page-title-main">2018 British Columbia electoral reform referendum</span> Referendum on British Columbias voting system

A referendum on electoral reform took place by mail-in ballot between October 22 and December 7, 2018, in the Canadian province of British Columbia. 61.3 percent of voters supported maintaining the first-past-the-post voting system rather than switching to a proportional representation voting system, which was supported by 38.7 percent of voters. This was British Columbia's third referendum on electoral reform, following ones in 2005 and 2009.

<span class="mw-page-title-main">Rural–urban proportional representation</span> Canadian hybrid proportional electoral system

Rural–urban proportional representation (RUP), also called flexible district PR, is a mixed electoral system which combines the use of single- and multi-member constituencies in a lower tier and top-up seats in an upper tier to meet the different needs of both rural and urban areas, while protecting the objective of proportionality. The term was coined by Fair Vote Canada, which devised a rural–urban system with the intention of meeting the special challenges of Canada's geography, which includes wide-flung, sparsely populated areas.

The mixed single vote (MSV) or positive vote transfer system (PVT) is a mixed-member electoral system, where voters cast a single vote in an election, which used both for electing a local candidate and as a vote for a party affiliated with that candidate according to the rules of the electoral system. Unlike the more widespread mixed proportional and mixed majoritarian systems where voters cast two votes, split-ticket voting is not possible in MSV.

The mixed ballot transferable vote (MBTV) refers to a type of vote linkage-based mixed-member electoral system where a group of members are elected on local (lower) tier, for example in single-member districts (SMDs). Other members are elected on a compensatory national (upper) tier from a list and voters cast a single ballot where they may indicate their preferences separately.

Mixed-member majoritarian representation (MMM) is type of a mixed electoral system combining winner-take-all and proportional methods, where the disproportional results of the winner-take-all part are dominant over the proportional component. Mixed member majoritarian systems are therefore categorized under semi-proportional representation, and are usually contrasted with mixed-member proportional representation (MMP) which aims to provide proportional representation compensation ("top-up") seats.

The majority jackpot system (MJS), also known as majority-minority apportionment is a mixed-member majoritarian method. It provides for semi-proportional representation by giving a certain number of seats in a legislature to a certain party or alliance, with the aim of providing government stability. The majority jackpot is typically classified a mixed electoral system, as it combines the proportional and winner-take-all system by a principle called fusion. This is different from parallel voting (superposition) and coexistence. A majority jackpot can also be considered a supermixed system, since it usually has a conditional and corrective element. This differentiated in from the similar majority bonus system.

Compensation or correction is an optional mechanism of electoral systems, which corrects the results of one part of the system based on some criterion to achieve a certain result, usually to make it more proportional. There are in general two forms of compensation: vote linkage and seat linkage.

References

  1. Massicotte & Blais (1999). "Mixed electoral systems: a conceptual and empirical survey". Electoral Studies. 18 (3): 341–366. doi:10.1016/S0261-3794(98)00063-8.
  2. Massicotte, Louis (2004). In Search of Compensatory Mixed Electoral System for Québec (PDF) (Report).