Proportional representation (PR) characterizes electoral systems in which divisions in an electorate are reflected proportionately in the elected body. If n% of the electorate support a particular political party, then roughly n% of seats will be won by that party. The essence of such systems is that all votes contribute to the result - not just a plurality, or a bare majority. The most prevalent forms of proportional representation all require the use of multiple-member voting districts (also called super-districts), as it is not possible to fill a single seat in a proportional manner. In fact, the implementations of PR that achieve the highest levels of proportionality tend to include districts with large numbers of seats.
With party list PR, political parties define candidate lists and voters vote for a list. The relative vote for each list determines how many candidates from each list are actually elected. Lists can be "closed" or "open"; open lists allow voters to indicate individual candidate preferences and vote for independent candidates. Voting districts can be small (as few as three seats in some districts in Chile or Ireland) or as large as a province or an entire nation.
The single transferable vote uses small multiple-member districts, with voters ranking individual candidates in order of preference. During the count, as candidates are elected or eliminated, surplus or discarded votes that would otherwise be wasted are transferred to other candidates according to the preferences. STV enables voters to vote across party lines and to elect independent candidates.
Mixed member proportional representation (MMP), also called the additional member system (AMS), is a two-tier mixed electoral system combining a non-proportional plurality/majoritarian election and a compensatory regional or national party list PR election. Voters typically have two votes, one for their single-member district and one for the party list, the party list vote determining the balance of the parties in the elected body.
According to the ACE Electoral Knowledge Network, some form of proportional representation is used for national lower house elections in 94 countries. Party list PR, being used in 85 countries, is the most widely used. MMP is used in seven lower houses. STV, despite long being advocated by political scientists,:71 is used in only two: Ireland, since independence in 1922, and Malta, since 1921.
In a representative body actually deliberating, the minority must of course be overruled; and in an equal democracy, the majority of the people, through their representatives, will outvote and prevail over the minority and their representatives. But does it follow that the minority should have no representatives at all? ... Is it necessary that the minority should not even be heard? Nothing but habit and old association can reconcile any reasonable being to the needless injustice. In a really equal democracy, every or any section would be represented, not disproportionately, but proportionately. A majority of the electors would always have a majority of the representatives, but a minority of the electors would always have a minority of the representatives. Man for man, they would be as fully represented as the majority. Unless they are, there is not equal government ... there is a part whose fair and equal share of influence in the representation is withheld from them, contrary to all just government, but, above all, contrary to the principle of democracy, which professes equality as its very root and foundation.
PR tries to resolve the unfairness of majoritarian and plurality voting systems where the largest parties receive an "unfair" "seat bonus" and smaller parties are disadvantaged and have difficulty winning any representation at all (Duverger's law).:6–7 The established parties in UK elections can win formal control of the parliament with as little as 35% of votes (2005 UK general election). In certain Canadian elections, majority governments have been formed by parties with the support of under 40% of votes cast (2011 Canadian election, 2015 Canadian election). If turnout levels in the electorate are less than 60%, such outcomes allow a party to form a majority government by convincing as few as one quarter of the electorate to vote for it. In the 2005 UK election, for example, the Labour Party under Tony Blair won a comfortable parliamentary majority with the votes of only 21.6% of the total electorate.:3 Such misrepresentation has been criticized as "no longer a question of 'fairness' but of elementary rights of citizens".:22 Note intermediate PR systems with a high electoral threshold, or other features that reduce proportionality, are not necessarily much fairer: in the Turkish general election, 2002, using an open list system with a 10% threshold, 46% of votes were wasted.:83
Plurality/majoritarian systems can also disproportionately benefit regional parties that can win districts where they have a strong following, while other parties with national support but no strongholds, like the Greens, win few or no seats. An example is the Bloc Québécois in Canada that won 52 seats in the 1993 federal election, all in Quebec, on 13.5% of the national vote, while the Progressive Conservatives collapsed to two seats on 16% spread nationally. Similarly, in the 2015 UK General Election, the Scottish National Party gained 56 seats, all in Scotland, with a 4.7% share of the national vote while the UK Independence Party, with 12.6%, gained only a single seat.
The use of multiple-member districts enables a greater variety of candidates to be elected. The more representatives per district and the lower the minimum threshold of votes required for election, the more minor parties can gain representation. It has been argued that in emerging democracies, inclusion of minorities in the legislature can be essential for social stability and to consolidate the democratic process.:58
Critics, on the other hand, claim this can give extreme parties a foothold in parliament, sometimes cited as a cause for the collapse of the Weimar government. With very low thresholds, very small parties can act as "king-makers", holding larger parties to ransom during coalition discussions. The example of Israel is often quoted,:59 but these problems can be limited, as in the modern German Bundestag, by the introduction of higher threshold limits for a party to gain parliamentary representation.
Another criticism is that the dominant parties in plurality/majoritarian systems, often looked on as "coalitions" or as "broad churches", can fragment under PR as the election of candidates from smaller groups becomes possible. Israel, again, and Brazil and Italy are examples.:59,89 However, research shows, in general, there is only a marginal increase in the number of parties in parliament.
Open list systems and STV, the only prominent PR system which does not require political parties, enable independent candidates to be elected. In Ireland, on average, about six independent candidates have been elected each parliament.
Supporters of PR see coalitions as an advantage, forcing compromise between parties to form a coalition at the centre of the political spectrum, and so leading to continuity and stability. Opponents counter that with many policies compromise is not possible (for example funding a new stealth bomber, or leaving the EU). Neither can many policies be easily positioned on the left-right spectrum (for example, the environment). So policies are horse-traded during coalition formation, with the consequence that voters have no way of knowing which policies will be pursued by the government they elect; voters have less influence on governments. Also, coalitions do not necessarily form at the centre, and small parties can have excessive influence, supplying a coalition with a majority only on condition that a policy or policies favoured by few voters is/are adopted. Most importantly, the ability of voters to vote a party in disfavour out of power is curtailed.
All these disadvantages, the PR opponents contend, are avoided by two-party plurality systems. Coalitions are rare; the two dominant parties necessarily compete at the centre for votes, so that governments are more reliably moderate; the strong opposition necessary for proper scrutiny of government is assured; and governments remain sensitive to public sentiment because they can be, and are, regularly voted out of power. However, the US experience shows that this is not necessarily so, and that a two-party system can result in a "drift to extremes", hollowing out the centre, or, at least, in one party drifting to an extreme. The opponents of PR also contend that coalition governments created under PR are less stable, and elections are more frequent. Italy is an often-cited example with many governments composed of many different coalition partners. However, Italy is unusual in that both its houses can make a government fall, whereas other PR nations have either just one house or have one of their two houses be the core body supporting a government. The mix of FPTP and PR since 1993 also makes for a complicated setup, so Italy is not an appropriate candidate for measuring the stability of PR.
Nevertheless, some studies have found that on average, compared to countries using plurality systems, governments elected with PR accord more closely with the median voter and the citizens are more content with democracy.
Plurality systems usually result in single-party government because relatively few votes in the most finely balanced districts, the "swing seats", can transfer sufficient seats to the opposition to swing the election. More partisan districts remain invulnerable to swings of political mood. In the UK, for example, about half the constituencies have always elected the same party since 1945; in the 2012 US House elections 45 districts (10% of all districts) were uncontested by one of the two dominant parties. Voters who know their preferred candidate cannot win have little incentive to vote, and if they do their vote has no effect, it is "wasted".:10
With PR, there are no "swing seats", most votes contribute to the election of a candidate so parties need to campaign in all districts, not just those where their support is strongest or where they perceive most advantage. This fact in turn encourages parties to be more responsive to voters, producing a more "balanced" ticket by nominating more women and minority candidates. On average about 8% more women are elected.
Since most votes count, there are fewer "wasted votes", so voters, aware that their vote can make a difference, are more likely to make the effort to vote, and less likely to vote tactically. Compared to countries with plurality electoral systems, voter turnout improves and the population is more involved in the political process. However some experts argue that transitioning from plurality to PR only increases voter turnout in geographical areas associated with safe seats under the plurality system; turnout may decrease in areas formerly associated with swing seats.
To ensure approximately equal representation, plurality systems are dependent on the drawing of boundaries of their single-member districts, a process vulnerable to political interference (gerrymandering). To compound the problem, boundaries have to be periodically re-drawn to accommodate population changes. Even apolitically drawn boundaries can unintentionally produce the effect of gerrymandering, reflecting naturally occurring concentrations.:65 PR systems with their multiple-member districts are less prone to this – research suggests five-seat districts are immune to gerrymandering.:66 The district boundaries are less critical and so can be aligned with historical boundaries such as cities, counties, states, or provinces; population changes can be accommodated by simply adjusting the number of representatives elected. For example, Professor Mollison in his 2010 plan for STV for the UK set an upper limit of 100,000 electors per MP so that a constituency of 500,000 electors would have five seats (1:100,000) but one of 500,001 six seats (1:83,000). His district boundaries follow historical county and local authority boundaries, yet he achieves more uniform representation than does the Boundary Commission, the body responsible for balancing the UK's first-past-the-post constituency sizes.
Mixed member systems are susceptible to gerrymandering for the local seats that remain a part of such systems. Under parallel voting, a semi-proportional system, there is no compensation for the effects that such gerrymandering might have. Under MMP, the use of compensatory list seats makes gerrymandering less of an issue. However, its effectiveness in this regard depends upon the features of the system, including the size of the regional districts, the relative share of list seats in the total, and opportunities for collusion that might exist. A striking example of how the compensatory mechanism can be undermined can be seen in the 2014 Hungarian parliamentary election, where the leading party, Fidesz, combined gerrymandering and decoy lists, which resulted in a two-thirds parliamentary majority from a 45% vote. This illustrates how certain implementations of MMP can produce moderately proportional outcomes, similar to parallel voting.
It is generally accepted that a particular advantage of plurality electoral systems such as first past the post, or majoritarian electoral systems such as the alternative vote, is the geographic link between representatives and their constituents.:36:65:21 A notable disadvantage of PR is that, as its multiple-member districts are made larger, this link is weakened.:82 In party list PR systems without delineated districts, such as the Netherlands and Israel, the geographic link between representatives and their constituents is considered weak, but has shown to play a role for some parties. Yet with relatively small multiple-member districts, in particular with STV, there are counter-arguments: about 90% of voters can consult a representative they voted for, someone whom they might think more sympathetic to their problem. In such cases it is sometimes argued that constituents and representatives have a closer link;:212 constituents have a choice of representative so they can consult one with particular expertise in the topic at issue.:212 With multiple-member districts, prominent candidates have more opportunity to be elected in their home constituencies, which they know and can represent authentically. There is less likely to be a strong incentive to parachute them into constituencies in which they are strangers and thus less than ideal representatives.:248–250 Mixed-member PR systems incorporate single-member districts to preserve the link between constituents and representatives.:95 However because up to half the parliamentary seats are list rather than district seats, the districts are necessarily up to twice as large as with a plurality/majoritarian system where all representatives serve single-member districts.:32
An interesting case occurred in the Netherlands, when "out of the blue" a Party for the Elderly gained six seats. The other parties had not paid attention, but this made them aware. With the next election, the Party of the Elderly was gone, because the established parties had started to listen to the elderly. Today, a party for older folks, 50PLUS, has established itself firmly in the Netherlands. This can be seen as an example how geography in itself may not be a good enough reason to establish voting results around it and overturn all other particulars of the voting population. In a sense, voting in districts restricts the voters to a specific geography. Proportional voting follows the exact outcome of all the votes.
Wider benefits from PR have been identified in societies using it as compared to those using FPTP, including higher scores on the UN Human Development Index, a measure of health, education, and personal security, higher economic growth, less inequality, and better environmental protection.
Academics agree that the most important influence on proportionality is an electoral district's magnitude, the number of representatives elected from the district. Proportionality improves as the magnitude increases. Some scholars recommend voting districts of roughly four to eight seats, which are considered small relative to PR systems in general.
At one extreme, the binomial electoral system used in Chile between 1989 and 2013, a nominally proportional open-list system, features two-member districts. As this system can be expected to result in the election of one candidate from each of the two dominant political blocks in most districts, it is not generally considered proportional.:79
At the other extreme, where the district encompasses the entire country (and with a low minimum threshold, highly proportionate representation of political parties can result), parties gain by broadening their appeal by nominating more minority and women candidates.:83
After the introduction of STV in Ireland in 1921 district magnitudes slowly diminished as more and more three-member constituencies were defined, benefiting the dominant Fianna Fáil, until 1979 when an independent boundary commission was established reversing the trend. In 2010, a parliamentary constitutional committee recommended a minimum magnitude of four. Nonetheless, despite relatively low magnitudes Ireland has generally experienced highly proportional results.:73
In the FairVote plan for STV (which FairVote calls choice voting) for the US House of Representatives, three- to five-member super-districts are proposed. In Professor Mollison's plan for STV in the UK, four- and five-member districts are used, with three and six as necessary to fit existing boundaries.
The minimum threshold is the minimum vote required to win a seat. The lower the threshold, the higher the proportion of votes contributing to the election of representatives and the lower the proportion of votes wasted.
All electoral systems have thresholds, either formally defined or as a mathematical consequence of the parameters of the election.:83
A formal threshold usually requires parties to win a certain percentage of the vote in order to be awarded seats from the party lists. In Germany and New Zealand (both MMP), the threshold is 5% of the national vote but the threshold is not applied to parties that win a minimum number of constituency seats (three in Germany, one in New Zealand). Turkey defines a threshold of 10%, the Netherlands 0.67%. Israel has raised its threshold from 1% (before 1992) to 1.5% (up to 2004), 2% (in 2006) and 3.25% in 2014.
In STV elections, winning the quota (ballots/(seats+1)) of first preference votes assures election. However, well regarded candidates who attract good second (and third, etc.) preference support can hope to win election with only half the quota of first preference votes. Thus, in a six-seat district the effective threshold would be 7.14% of first preference votes (100/(6+1)/2). The need to attract second preferences tends to promote consensus and disadvantage extremes.
Party magnitude is the number of candidates elected from one party in one district. As party magnitude increases a more balanced ticket will be more successful encouraging parties to nominate women and minority candidates for election.
But under STV, nominating too many candidates can be counter-productive, splitting the first-preference votes and allowing the candidates to be eliminated before receiving transferred votes from other parties. An example of this was identified in a ward in the 2007 Scottish local elections where Labour, putting up three candidates, won only one seat while they might have won two had one of their voters' preferred candidates not stood. The same effect may have contributed to the collapse of Fianna Fáil in the 2011 Irish general election.
A president is always elected as a winner (winner-takes-all), and as such a president may exists above a parliament that was voted in according to a different election format. This situation is found particularly in South America. In the case of Brazil, for instance, an empowered President is elected while the House was elected proportionally. The strong position of the single President is countered by a much divided House and this may result in a weakening of the benefits associated with proportional representation. Compare this situation to the United States, where the strong President is countered by just two parties that can be considered both by themselves as also strong. As such, the strong power of the President can be countered by the strong support/opposition of the parties. With a proportionally elected House, a President may strong-arm certain political issues.
A Prime-Minister is never elected, but is a 'derivative' of the general election. In most cases, the power of the government is not split among different sections of the government (of President, Senate and House) and power is found with just the House. A Prime-Minister can be seen more as a manager than as a straight-out leader. Nations with district elections (such as the UK) and nations with proportionally elected representatives (such as Spain) can have a Prime-Minister.
Other aspects of PR can influence proportionality such as the size of the elected body, the choice of open or closed lists, ballot design, and vote counting methods.
A number of ways of measuring proportionality have been proposed, including the Loosemore–Hanby index, the Gallagher Index, and the Sainte-Laguë Index. These metrics actually quantify the disproportionality of an election, the degree to which the number of seats won by each party differs from that of a perfectly proportional outcome. For example, the Canadian Parliament's 2016 Special Committee on Electoral Reform recommended that a system be designed to achieve "a Gallagher score of 5 or less". This indicated a much higher degree of proportionality than observed in the 2015 Canadian election under first-past-the-post voting, where the Gallagher index was 12.
The Loosemore-Hanby index is calculated by subtracting each party's vote share from its seat share, adding up the absolute values (ignoring any negative signs), and dividing by two.:4–6
The Gallagher index is similar, but involves squaring the difference between each party’s vote share and seat share, and taking the square root of the sum.
With the Sainte-Laguë index, the discrepancy between a party’s vote share and seat share is measured relative to its vote share.
Party list proportional representation is an electoral system in which seats are first allocated to parties based on vote share, and then assigned to party-affiliated candidates on the parties' electoral lists. This system is used in many countries, including Finland (open list), Latvia (open list), Sweden (open list), Israel (national closed list), Brazil (open list), Nepal (Closed list) adopted in 2008 in first CA election, the Netherlands (open list), Russia (closed list), South Africa (closed list), Democratic Republic of the Congo (open list), and Ukraine (open list). For elections to the European Parliament, most member states use open lists; but most large EU countries use closed lists, so that the majority of EP seats are distributed by those. Local lists were used to elect the Italian Senate during the second half of the 20th century.
In closed list systems, each party lists its candidates according to the party's candidate selection process. This sets the order of candidates on the list and thus, in effect, their probability of being elected. The first candidate on a list, for example, will get the first seat that party wins. Each voter casts a vote for a list of candidates. Voters, therefore, do not have the option to express their preferences at the ballot as to which of a party's candidates are elected into office. A party is allocated seats in proportion to the number of votes it receives.
There is an intermediate system in countries like Uruguay, where each party presents several closed lists, each representing a faction. Seats are distributed between parties according to the number of votes, and then between the factions within each party.
In an open list, voters may vote, depending on the model, for one person, or for two, or indicate their order of preference within the list. These votes sometimes rearrange the order of names on the party's list and thus which of its candidates are elected. Nevertheless, the number of candidates elected from the list is determined by the number of votes the list receives.
In a local list system, parties divide their candidates in single member-like constituencies, which are ranked inside each general party list depending by their percentages. This method allows electors to judge every single candidate as in a FPTP system.
Some party list proportional systems with open lists use a two-tier compensatory system, as in Denmark, Norway, and Sweden. In Denmark, for example, the country is divided into ten multiple-member voting districts arranged in three regions, electing 135 representatives. In addition, 40 compensatory seats are elected. Voters have one vote which can be cast for an individual candidate or for a party list on the district ballot. To determine district winners, candidates are apportioned their share of their party's district list vote plus their individual votes. The compensatory seats are apportioned to the regions according to the party votes aggregated nationally, and then to the districts where the compensatory representatives are determined. In the 2007 general election, the district magnitudes, including compensatory representatives, varied between 14 and 28. The basic design of the system has remained unchanged since its introduction in 1920.
The single transferable vote (STV), also called choice voting, is a ranked system: voters rank candidates in order of preference. Voting districts usually elect three to seven representatives. The count is cyclic, electing or eliminating candidates and transferring votes until all seats are filled. A candidate is elected whose tally reaches a quota, the minimum vote that guarantees election. The candidate's surplus votes (those in excess of the quota) are transferred to other candidates at a fraction of their value proportionate to the surplus, according to the votes' preferences. If no candidates reach the quota, the candidate with the fewest votes is eliminated, those votes being transferred to their next preference at full value, and the count continues. There are many methods for transferring votes. Some early, manual, methods transferred surplus votes according to a randomly selected sample, or transferred only a "batch" of the surplus, other more recent methods transfer all votes at a fraction of their value (the surplus divided by the candidate's tally) but may need the use of a computer. Some methods may not produce exactly the same result when the count is repeated. There are also different ways of treating transfers to already elected or eliminated candidates, and these, too, can require a computer.
In effect, the method produces groups of voters of equal size that reflect the diversity of the electorate, each group having a representative the group voted for. Some 90% of voters have a representative to whom they gave their first preference. Voters can choose candidates using any criteria they wish, the proportionality is implicit. Political parties are not necessary; all other prominent PR electoral systems presume that parties reflect voters wishes, which many believe gives power to parties. STV satisfies the electoral system criterion proportionality for solid coalitions – a solid coalition for a set of candidates is the group of voters that rank all those candidates above all others – and is therefore considered a system of proportional representation. However, the small district magnitude used in STV elections has been criticized as impairing proportionality, especially when more parties compete than there are seats available,:50 and STV has, for this reason, sometimes been labelled "quasi proportional".:83 While this may be true when considering districts in isolation, results overall are proportional. In Ireland, with particularly small magnitudes, results are "highly proportional".:73 In 1997, the average magnitude was 4.0 but eight parties gained representation, four of them with less than 3% of first preference votes nationally. Six independent candidates also won election. STV has also been described as the most proportional system.:83 The system tends to handicap extreme candidates because, to gain preferences and so improve their chance of election, candidates need to canvass voters beyond their own circle of supporters, and so need to moderate their views. Conversely, widely respected candidates can win election with relatively few first preferences by benefitting from strong subordinate preference support.
The term STV in Australia refers to the Senate electoral system, a variant of Hare-Clark characterized by the "above the line" group voting ticket, a party list option. It is used in the Australian upper house, the Senate, most state upper houses, the Tasmanian lower house and the Capital Territory assembly. Due to the number of preferences that are compulsory if a vote for candidates (below-the-line) is to be valid – for the Senate a minimum of 90% of candidates must be scored, in 2013 in New South Wales that meant writing 99 preferences on the ballot – 95% and more of voters use the above-the-line option, making the system, in all but name, a party list system. Parties determine the order in which candidates are elected and also control transfers to other lists and this has led to anomalies: preference deals between parties, and "micro parties" which rely entirely on these deals. Additionally, independent candidates are unelectable unless they form, or join, a group above-the-line. Concerning the development of STV in Australia researchers have observed: "... we see real evidence of the extent to which Australian politicians, particularly at national levels, are prone to fiddle with the electoral system".:86
As a result of a parliamentary commission investigating the 2013 election, from 2016 the system has been considerably reformed (see Australian federal election, 2016), with group voting tickets (GVTs) abolished and voters no longer required to fill all boxes.
A mixed compensatory system is an electoral system that is mixed, meaning that it combines a plurality/majority formula with a proportional formula, and that uses the proportional component to compensate for disproportionality caused by the plurality/majority component. For example, suppose that a party wins 10 seats based on plurality, but requires 15 seats in total to obtain its proportional share of an elected body. A fully proportional mixed compensatory system would award this party 5 compensatory (PR) seats, raising the party's seat count from 10 to 15. The most prominent mixed compensatory system is mixed member proportional representation (MMP), used in Germany since 1949. In MMP, the seats won by plurality are associated with single-member districts.
Mixed member proportional representation (MMP) is a two-tier system that combines a single-district vote, usually first-past-the-post, with a compensatory regional or nationwide party list proportional vote. The system aims to combine the local district representation of FPTP and the proportionality of a national party list system. MMP has the potential to produce proportional or moderately proportional election outcomes, depending on a number of factors such as the ratio of FPTP seats to PR seats, the existence or nonexistence of extra compensatory seats to make up for overhang seats, and election thresholds. It was invented for the German Bundestag after the Second World War and has spread to Lesotho, Bolivia and New Zealand. The system is also used for the Welsh and Scottish assemblies where it is called the additional member system.
Voters typically have two votes, one for their district representative and one for the party list. The list vote usually determines how many seats are allocated to each party in parliament. After the district winners have been determined, sufficient candidates from each party list are elected to "top-up" each party to the overall number of parliamentary seats due to it according to the party's overall list vote. Before apportioning list seats, all list votes for parties which failed to reach the minimum threshold are discarded. If eliminated parties lose seats in this manner, then the seat counts for parties that achieved the minimum threshold improve. Also, any direct seats won by independent candidates are subtracted from the parliamentary total used to apportion list seats.
The system has the potential to produce proportional results, but proportionality can be compromised if the ratio of list to district seats is too low, it may then not be possible to completely compensate district seat disproportionality. Another factor can be how overhang seats are handled, district seats that a party wins in excess of the number due to it under the list vote. To achieve proportionality, other parties require "balance seats", increasing the size of parliament by twice the number of overhang seats, but this is not always done. Until recently, Germany increased the size of parliament by the number of overhang seats but did not use the increased size for apportioning list seats. This was changed for the 2013 national election after the constitutional court rejected the previous law, not compensating for overhang seats had resulted in a negative vote weight effect. Lesotho, Scotland and Wales do not increase the size of parliament at all, and, in 2012, a New Zealand parliamentary commission also proposed abandoning compensation for overhang seats, and so fixing the size of parliament. At the same time, it would abolish the single-seat threshold – any such seats would then be overhang seats and would otherwise have increased the size of parliament further – and reduce the vote threshold from 5% to 4%. Proportionality would not suffer.
Dual member proportional representation (DMP) is a single-vote system that elects two representatives in every district. The first seat in each district is awarded to the candidate who wins a plurality of the votes, similar to first-past-the-post voting. The remaining seats are awarded in a compensatory manner to achieve proportionality across a larger region. DMP employs a formula similar to the "best near-winner" variant of MMP used in the German state of Baden-Württemberg. In Baden-Württemberg, compensatory seats are awarded to candidates who receive high levels of support at the district level compared with other candidates of the same party. DMP differs in that at most one candidate per district is permitted to obtain a compensatory seat. If multiple candidates contesting the same district are slated to receive one of their parties' compensatory seats, the candidate with the highest vote share is elected and the others are eliminated. DMP is similar to STV in that all elected representatives, including those who receive compensatory seats, serve their local districts. Invented in 2013 in the Canadian province of Alberta, DMP received attention on Prince Edward Island where it appeared on a 2016 plebiscite as a potential replacement for FPTP, but was eliminated on the third round.
Biproportional apportionment applies a mathematical method (iterative proportional fitting) for the modification of an election result to achieve proportionality. It was proposed for elections by the mathematician Michel Balinski in 1989, and first used by the city of Zurich for its council elections in February 2006, in a modified form called "new Zurich apportionment" (Neue Zürcher Zuteilungsverfahren). Zurich had had to modify its party list PR system after the Swiss Federal Court ruled that its smallest wards, as a result of population changes over many years, unconstitutionally disadvantaged smaller political parties. With biproportional apportionment, the use of open party lists hasn't changed, but the way winning candidates are determined has. The proportion of seats due to each party is calculated according to their overall citywide vote, and then the district winners are adjusted to conform to these proportions. This means that some candidates, who would otherwise have been successful, can be denied seats in favor of initially unsuccessful candidates, in order to improve the relative proportions of their respective parties overall. This peculiarity is accepted by the Zurich electorate because the resulting city council is proportional and all votes, regardless of district magnitude, now have equal weight. The system has since been adopted by other Swiss cities and cantons.
Balinski has proposed another variant called fair majority voting (FMV) to replace single-winner plurality/majoritarian electoral systems, in particular the system used for the US House of Representatives. FMV introduces proportionality without changing the method of voting, the number of seats, or the – possibly gerrymandered – district boundaries. Seats would be apportioned to parties in a proportional manner at the state level. In a related proposal for the UK parliament, whose elections are contested by many more parties, the authors note that parameters can be tuned to adopt any degree of proportionality deemed acceptable to the electorate. In order to elect smaller parties, a number of constituencies would be awarded to candidates placed fourth or even fifth in the constituency – unlikely to be acceptable to the electorate, the authors concede – but this effect could be substantially reduced by incorporating a third, regional, apportionment tier, or by specifying minimum thresholds.
Reweighted range voting (RRV) is a multi-winner voting system similar to STV in that voters can express support for multiple candidates, but different in that candidates are graded instead of ranked. That is, a voter assigns a score to each candidate. The higher a candidate’s scores, the greater the chance they will be among the winners.
Similar to STV, the vote counting procedure occurs in rounds. The first round of RRV is identical to range voting. All ballots are added with equal weight, and the candidate with the highest overall score is elected. In all subsequent rounds, ballots that support candidates who have already been elected are added with a reduced weight. Thus voters who support none of the winners in the early rounds are increasingly likely to elect one of their preferred candidates in a later round. The procedure has been shown to yield proportional outcomes if voters are loyal to distinct groups of candidates (e.g. political parties).
Systems can be devised that aim at proportional representation but are based on approval votes on individual candidates (not parties). Such is the idea of Proportional approval voting (PAV). Unfortunately counting ballots under PAV may be uneasy, so that that sequential variants have been proposed, such as Reweighted approval voting (RAV). This method is similar to reweighted range voting in that several winners are elected using a multi-round counting procedure in which ballots supporting already elected candidates are given reduced weights. Under RAV, however, a voter can only choose to approve or disapprove of each candidate, as in approval voting. RAV was used briefly in Sweden during the early 1900s.
In asset voting, the voters vote for candidates and then the candidates negotiate amongst each other and reallocate votes amongst themselves. Asset voting was independently rediscovered by each of Lewis Carroll, Warren D. Smith, and Forest Simmons.
The random ballot, or lottery voting, is a single-vote, single-winner voting method in which one of the marked ballots is selected at random, and the candidate supported by that ballot is declared the winner. Although it has been described as "a thought experiment", the system is statistically likely to produce proportional election outcomes if applied over a large number of single-member districts.
In a related method called sortition, one dispenses with voting altogether and simply appoints randomly selected individuals from a population to serve in a representative decision-making body.
Similar to Majority Judgment voting that elects single winners, Evaluative Proportional Representation (EPR) elects all the members of a legislative body. Both systems remove the qualitative wasting of votes.  Each citizen grades the fitness for office of as many of the candidates as they wish as either Excellent (ideal), Very Good, Good, Acceptable, Poor, or Reject. Using EPR, each citizen elects their representative at-large for a city council. For a large and diverse state legislature, each citizen can chooses to vote through any of the districts or official electoral associations in the country. Each can grade any number of candidates in the whole country. Each elected representative has a different number of weighted votes in the legislative body. This number is equal to the total number of highest available grades counted for them from all the voters – no citizen’s vote is "wasted". 
It should be in miniature, an exact portrait of the people at large. It should think, feel, reason, and act like them. That it may be the interest of this Assembly to do strict justice at all times, it should be an equal representation, or in other words equal interest among the people should have equal interest in it.
A representative body is to the nation what a chart is for the physical configuration of its soil: in all its parts, and as a whole, the representative body should at all times present a reduced picture of the people, their opinions, aspirations, and wishes, and that presentation should bear the relative proportion to the original precisely.
In February 1793, the Marquis de Condorcet led the drafting of the Girondist constitution which proposed a limited voting scheme with proportional aspects. Before that could be voted on, the Montagnards took over the National Convention and produced their own constitution. On June 24, Saint-Just proposed the single non-transferable vote, which can be proportional, for national elections but the constitution was passed on the same day specifying first-past-the-post voting.
Already in 1787, James Wilson, like Adams a US Founding Father, understood the importance of multiple-member districts: "Bad elections proceed from the smallness of the districts which give an opportunity to bad men to intrigue themselves into office", and again, in 1791, in his Lectures on Law: "It may, I believe, be assumed as a general maxim, of no small importance in democratical governments, that the more extensive the district of election is, the choice will be the more wise and enlightened". The 1790 Constitution of Pennsylvania specified multiple-member districts for the state Senate and required their boundaries to follow county lines.
STV, or, more precisely, an election method where voters have one transferable vote, was first invented in 1819 by an English schoolmaster, Thomas Wright Hill, who devised a "plan of election" for the committee of the Society for Literary and Scientific Improvement in Birmingham that used not only transfers of surplus votes from winners but also from losers, a refinement that later both Andræ and Hare initially omitted. But the procedure was unsuitable for a public election and wasn't publicised. In 1839, Hill's son, Rowland Hill, recommended the concept for public elections in Adelaide, and a simple process was used in which voters formed as many groups as there were representatives to be elected, each group electing one representative.
The first practical PR election method, a list method, was conceived by Thomas Gilpin, a retired paper-mill owner, in a paper he read to the American Philosophical Society in Philadelphia in 1844: "On the representation of minorities of electors to act with the majority in elected assemblies". But the paper appears not to have excited any interest.
A practical election using a single transferable vote was devised in Denmark by Carl Andræ, a mathematician, and first used there in 1855, making it the oldest PR system, but the system never really spread. It was re-invented (apparently independently) in the UK in 1857 by Thomas Hare, a London barrister, in his pamphlet The Machinery of Representation and expanded on in his 1859 Treatise on the Election of Representatives. The scheme was enthusiastically taken up by John Stuart Mill, ensuring international interest. The 1865 edition of the book included the transfer of preferences from dropped candidates and the STV method was essentially complete. Mill proposed it to the House of Commons in 1867, but the British parliament rejected it. The name evolved from "Mr.Hare's scheme" to "proportional representation", then "proportional representation with the single transferable vote", and finally, by the end of the 19th century, to "the single transferable vote".
A party list proportional representation system was devised and described in 1878 by Victor D'Hondt in Belgium. D'Hondt's method of seat allocation, the D'Hondt method, is still widely used. Victor Considerant, a utopian socialist, devised a similar system in an 1892 book. Some Swiss cantons (beginning with Ticino in 1890) used the system before Belgium, which was first to adopt list PR in 1900 for its national parliament. Many European countries adopted similar systems during or after World War I. List PR was favoured on the Continent because the use of lists in elections, the scrutin de liste, was already widespread. STV was preferred in the English-speaking world because its tradition was the election of individuals.
In the UK, the 1917 Speaker's Conference recommended STV for all multi-seat Westminster constituencies, but it was only applied to university constituencies, lasting from 1918 until 1950 when those constituencies were abolished. In Ireland, STV was used in 1918 in the University of Dublin constituency, and was introduced for devolved elections in 1921.
STV is currently used for two national lower houses of parliament, Ireland, since independence (as the Irish Free State) in 1922, and Malta, since 1921, long before independence in 1966. In Ireland, two attempts have been made by Fianna Fáil governments to abolish STV and replace it with the 'First Past the Post' plurality system. Both attempts were rejected by voters in referendums held in 1959 and again in 1968.. STV is also used for all other elections in Ireland except for that of the presidency,
It is also used for the Northern Irish assembly and European and local authorities, Scottish local authorities, some New Zealand and Australian local authorities, the Tasmanian (since 1907) and Australian Capital Territory assemblies, where the method is known as Hare-Clark, and the city council in Cambridge, Massachusetts, (since 1941).
PR is used by a majority of the world's 33 most robust democracies with populations of at least two million people; only six use plurality or a majoritarian system (runoff or instant runoff) for elections to the legislative assembly, four use parallel systems, and 23 use PR. PR dominates Europe, including Germany and most of northern and eastern Europe; it is also used for European Parliament elections. France adopted PR at the end of World War II, but discarded it in 1958; it was used for parliament elections in 1986. Switzerland has the most widespread use of proportional representation, which is the system used to elect not only national legislatures and local councils, but also all local executives. PR is less common in the English-speaking world; New Zealand adopted MMP in 1993, but the UK, Canada, India and Australia all use plurality/majoritarian systems for legislative elections.
In Canada, STV was used by the cities of Edmonton and Calgary in Alberta from 1926 to 1955, and by Winnipeg in Manitoba from 1920 to 1953. In both provinces the alternative vote (AV) was used in rural areas. First-past-the-post was re-adopted in Alberta by the dominant party for reasons of political advantage, in Manitoba a principal reason was the underrepresentation of Winnipeg in the provincial legislature.:223–234
STV has some history in the United States. Between 1915 and 1962, twenty-four cities used the system for at least one election. In many cities, minority parties and other groups used STV to break up single-party monopolies on elective office. One of the most famous cases is New York City, where a coalition of Republicans and others imposed STV in 1936 as part of an attack on the Tammany Hall machine. Another famous case is Cincinnati, Ohio, where, in 1924, Democrats and Progressive-wing Republicans imposed a council-manager charter with STV elections to dislodge the Republican machine of Rudolph K. Hynicka. Although Cincinnati's council-manager system survives, Republicans and other disaffected groups replaced STV with plurality-at-large voting in 1957. From 1870 to 1980, Illinois used a semi-proportional cumulative voting system to elect its House of Representatives. Each district across the state elected both Republicans and Democrats year-after-year. Cambridge, Massachusetts, (STV) and Peoria, Illinois, (cumulative voting) continue to use PR. San Francisco had citywide elections in which people would cast votes for five or six candidates simultaneously, delivering some of the benefits of proportional representation.
The table below lists the countries that use a PR electoral system to fill a nationwide elected body. Detailed information on electoral systems applying to the first chamber of the legislature is maintained by the ACE Electoral Knowledge Network. (See also the complete list of electoral systems by country.)
|1||Albania||Party list, 4% national threshold or 2.5% in a district|
|4||Argentina||Party list in the Chamber of Deputies|
|5||Armenia||Two-tier party list
 Nationwide closed lists and open lists in each of 13 election districts. If needed to ensure a stable majority with at least 54% of the seats, the two best-placed parties participate in a run-off vote to receive a majority bonus. Threshold of 5% for parties and 7% for election blocs.
|7||Australia||For Senate only, Single transferable vote|
|8||Austria||Party list, 4% threshold|
|9||Belgium||Party list, 5% threshold|
|11||Bolivia||Mixed-member proportional representation, 3% threshold|
|12||Bosnia and Herzegovina||Party list|
|14||Bulgaria||Party list, 4% threshold|
|15||Burkina Faso||Party list|
|16||Burundi||Party list, 2% threshold|
|18||Cape Verde||Party list|
|21||Costa Rica||Party list|
|22||Croatia||Party list, 5% threshold|
|24||Czech Republic||Party list, 5% threshold|
|25||Denmark||Two-tier party list, 2% threshold|
|26||Dominican Republic||Party list|
|27||East Timor||Party list|
|28||El Salvador||Party list|
|29||Equatorial Guinea||Party list|
|30||Estonia||Party list, 5% threshold|
|31||European Union||Each member state chooses its own PR system|
|32||Faroe Islands||Party list|
|33||Fiji||Party list, 5% threshold|
|35||Germany||Mixed-member proportional representation, 5% (or 3 district winners) threshold|
|36||Greece||Two-tier party list|
|43||Indonesia||Party list, 3.5% threshold|
|45||Ireland||Single transferable vote|
|46||Israel||Party list, 3.25% threshold|
|47||Kazakhstan||Party list, 7% threshold|
|49||Kyrgyzstan||Party list, 5% threshold|
|50||Latvia||Party list, 5% threshold|
|52||Lesotho||Mixed-member proportional representation|
|53||Liechtenstein||Party list, 8% threshold|
|56||Malta||Single transferable vote|
|57||Moldova||Party list, 6% threshold|
|62||New Zealand||Mixed-member proportional representation, 5% (or 1 district winner) threshold|
|64||Northern Ireland||Single transferable vote|
|65||Norway||Two-tier party list, 4% national threshold|
|68||Poland||Party list, 5% threshold or more|
|72||San Marino||Party list
If needed to ensure a stable majority, the two best-placed parties participate in a run-off vote to receive a majority bonus. Threshold of 3.5%.
|73||São Tomé and Príncipe||Party list|
|74||Serbia||Party list, 5% threshold or less|
|75||Sint Maarten||Party list|
|76||Slovakia||Party list, 5% threshold|
|77||Slovenia||Party list, 4% threshold|
|78||South Africa||Party list|
|79||Spain||Party list, 3% threshold in small constituencies|
|80||Sri Lanka||Party list|
|82||Sweden||Two-tier party list, 4% national threshold or 12% in a district|
|86||Turkey||Party list, 10% threshold|
The European Parliament Election, 1999 was the United Kingdom's part of the European Parliament election 1999. It was held on 10 June 1999. Following the European Parliamentary Elections Act 1999, it was the first European election to be held in the United Kingdom where the whole country used a system of proportional representation. In total, 87 Members of the European Parliament were elected from the United Kingdom.
The change in voting system resulted in significant changes in seats. The Conservatives won double the number of seats they had won in the previous European election, in 1994, while the Labour Party saw its seats reduced from 62 to 29. The Liberal Democrats saw their number of seats increase to 10 from just 2 in the previous election. The UK Independence Party (UKIP), Green Party and Plaid Cymru gained their first ever seats in the European Parliament.
The House of Commons Library calculated notional seat changes based on what the result would have been if the 1994 European elections had been held under proportional representation. The notional results and seat changes are shown in the results box for this article.
It was the first European Parliament election to be held since the 1997 general election which resulted in a change of government from Conservative to Labour.
Turnout was 24%, the lowest of any member state in the 1999 election where the EU average was 49.51%. It was also the lowest of any European election in the United Kingdom, and the lowest of any member state until the 2009 election.At-large
At-large is a designation for members of a governing body who are elected or appointed to represent the whole membership of the body (for example, a city, state or province, nation, club or association), rather than a subset of that membership. At-large voting is in contrast to voting by electoral districts.
If an at-large election is called to choose a single candidate, a single-winner voting system must necessarily be used. If a group of seats must be covered, many electoral systems can be possible, from proportional representation methods (such as party-list proportional representation, or PR-STV) to block voting.Closed list
Closed list describes the variant of party-list proportional representation where voters can (effectively) only vote for political parties as a whole and thus have no influence on the party-supplied order in which party candidates are elected. If voters have at least some influence then it is called an open list.
In closed list systems, each political party has pre-decided who will receive the seats allocated to that party in the elections, so that the candidates positioned highest on this list tend to always get a seat in the parliament while the candidates positioned very low on the closed list will not.
However, the candidates "at the water mark" of a given party are in the position of either losing or winning their seat depending on the number of votes the party gets. "The water mark" is the number of seats a specific party can be expected to achieve. The number of seats that the party wins, combined with the candidates' positions on the party's list, will then determine whether a particular candidate will get a seat.D'Hondt method
The D'Hondt method or the Jefferson method is a highest averages method for allocating seats, and is thus a type of party-list proportional representation. The method described is named in the United States after Thomas Jefferson, who introduced the method for proportional allocation of seats in the United States House of Representatives in 1791, and in Europe after Belgian mathematician Victor D'Hondt, who described it in 1878 for proportional allocation of parliamentary seats to the parties. There are two forms: closed list (a party selects the order of election of their candidates) and an open list (voters' choices determine the order).
Proportional representation systems aim to allocate seats to parties approximately in proportion to the number of votes received. For example, if a party wins one-third of the votes then it should gain about one-third of the seats. In general, exact proportionality is not possible because these divisions produce fractional numbers of seats. As a result, several methods, of which the D'Hondt method is one, have been devised which ensure that the parties' seat allocations, which are of whole numbers, are as proportional as possible. Empirical studies show that the D’Hondt method is one of the least proportional among the proportional representation methods. The D'Hondt slightly favours large parties and coalitions over scattered small parties. In comparison, the Webster/Sainte-Laguë method, a divisor method, reduces the reward to large parties, and it generally has benefited middle-size parties at the expense of both large and small parties. The axiomatic properties of the D’Hondt method were studied and they proved that the D’Hondt method is the unique consistent, monotone, stable, and balanced method that encourages coalitions. A method is consistent if it treats parties which received tied vote equally. By monotonicity, the number of seats provided to any state or party will not decrease if the house size increases. A method is stable if two merged parties would neither gain nor lose more than one seat. By coalition encouragement of the D’Hondt method, any alliance cannot lose the seat.
Legislatures using this system include those of Albania, Angola, Argentina, Armenia, Aruba, Austria, Belgium, Bolivia, Brazil, Bulgaria, Burundi, Cambodia, Cape Verde, Chile, Colombia, Croatia, the Czech Republic, Denmark, the Dominican Republic, East Timor, Ecuador, El Salvador, Estonia, Fiji, Finland, Guatemala, Hungary, Iceland, Israel, Japan, Kosovo, Luxembourg, Macedonia, Moldova, Monaco, Montenegro, Mozambique, Netherlands, Nicaragua, Northern Ireland, Paraguay, Peru, Poland, Portugal, Romania, San Marino, Scotland, Serbia, Slovenia, Spain, Switzerland, Turkey, Uruguay, Venezuela and Wales.
The system has also been used for the "top-up" seats in the London Assembly; in some countries for elections to the European Parliament; and during the 1997 Constitution era to allocate party-list parliamentary seats in Thailand. A modified form was used for elections in the Australian Capital Territory Legislative Assembly, but this was abandoned in favour of the Hare-Clark system. The system is also used in practice for the allocation between political groups of a large number of posts (Vice Presidents, committee chairmen and vice-chairmen, delegation chairmen and vice-chairmen) in the European Parliament and for the allocation of ministers in the Northern Ireland Assembly.Dual-member proportional representation
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 1st seat in every district is awarded to the candidate who receives the most votes, similar to first-past-the-post voting (FPTP). The 2nd 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.
DMP was invented in 2013 by a University of Alberta mathematics student named Sean Graham. The system was intended as a possible replacement for FPTP in Canadian national and provincial elections. Whereas campaigns to adopt mixed-member proportional representation (MMP) or the single transferable vote (STV) had recently been defeated in a number of Canadian provinces (see 2005 British Columbia referendum, 2005 Prince Edward Island referendum, 2007 Ontario referendum, 2009 British Columbia referendum), the intent behind DMP was to gain broader acceptance by retaining salient features of FPTP. These features include a one-vote ballot, relatively small districts (compared with STV), and a single tier of local representatives (in contrast to MMP).Proposals to consider DMP were submitted to the Government of Canada, Alberta, Prince Edward Island (PEI), and British Columbia (BC). In April 2016, the PEI Special Committee on Democratic Renewal officially recommended that DMP appear as one of five options on the 2016 PEI plebiscite, with the winning voting system determined by instant-runoff voting. The plebiscite took place from October 29 to November 7, 2016. DMP was eliminated on the 3rd round, and after its votes were redistributed MMP was declared the winner ahead of FPTP. In May 2018, DMP was one of three proportional systems selected to appear on the 2018 BC referendum. The referendum involved a two-question mail-in ballot to be returned by the extended deadline of December 7, 2018. On the first question, a 61% majority of voters chose to retain the current FPTP voting system instead of switching to a form of proportional representation. On the second question, which would have decided the specific proportional system, MMP enjoyed the most support, with DMP collecting slightly more first-choice preferences than rural–urban proportional representation.Electoral list
An electoral list is a grouping of candidates for election, usually in proportional election systems, but also in some plurality election systems. An electoral list can be registered by a political party or can constitute a group of independent candidates. Lists can be open, in which case electors have some influence over the ranking of the winning candidates, or closed, in which case the order of candidates is fixed at the registration of the list.
Electoral lists are required for party-list proportional representation voting systems.
An electoral list (not to be confused with an electoral roll) is made according to the applying nomination rules and election rules. Depending on the type of election, a political party, a general assembly, or a board meeting, may elect or appoint a nominating committee that will add, and if required, prioritize list-candidates according to their preferences. Qualification, popularity, gender, age, geography, and occupation are preferences that may influence the committee's work. The committee's proposed list may then be changed in a selection meeting, where new candidates may be added, or existing candidates may be moved or removed from the list. When the internal process is over, the final list is made public and is printed on the ballot paper used in the election. The right to vote comes under Universal adult franchise. Minimum age required for vote is 18years. And each vote have an equal value.Electoral reform
Electoral reform is change in electoral systems to improve how public desires are expressed in election results. That can include reforms of:
Voting systems, such as proportional representation, a two-round system (runoff voting), instant-runoff voting, Instant Round Robin Voting called Condorcet Voting, range voting, approval voting, citizen initiatives and referendums and recall elections.
Rules about political parties, typically changes to election laws
Eligibility to vote
How candidates and political parties are able to stand (nomination rules) and how they are able to get their names onto ballots (ballot access)
Electoral constituencies and election district borders
Ballot design and voting equipment
Scrutineering (election monitoring by candidates, political parties, etc.)
Safety of voters and election workers
Measures against bribery, coercion, and conflicts of interest
Financing of candidates' and referendum campaigns
Factors which affect the rate of voter participation (voter turnout)Galgamuwa Electoral District
Galgamuwa electoral district was an electoral district of Sri Lanka between July 1977 and February 1989. The district was named after the town of Galgamuwa in Kurunegala District, North Western Province. The 1978 Constitution of Sri Lanka introduced the proportional representation electoral system for electing members of Parliament. The existing 160 mainly single-member electoral districts were replaced with 22 multi-member electoral districts. Galgamuwa electoral district was replaced by the multi-member electoral district at the 1989 general elections, the first under the proportional representation system.General Assembly of Uruguay
The General Assembly of Uruguay (Asamblea General) has two chambers.
the Chamber of Deputies (Cámara de Diputados) has 99 members, elected for a five-year term by proportional representation.
the Chamber of Senators (Cámara de Senadores) has 31 members, 30 members elected for a five-year term by proportional representation and the Vice-president.Hokkaido proportional representation block
The Hokkaidō proportional representation block (比例[代表]北海道ブロック, Hirei [daihyō] Hokkaidō burokku) or in official usage the "Hokkaidō electoral district" (北海道選挙区, Hokkaidō senkyo-ku) is one of eleven proportional representation (PR) blocks for the House of Representatives in the Diet of Japan. It consists of Hokkaidō and is one of two PR blocks that covers only one prefecture, the other being Tokyo. Following the introduction of proportional voting, it elected nine representatives in the election of 1996. Since 2000, the Hokkaidō PR block has been represented by eight representatives.List MP
A list MP is a member of parliament (MP) who is elected from a party list rather than from a geographical constituency. Their presence in Parliament is owed to the number of votes that their party won, not to votes received by the MP personally. This occurs only in countries which have an electoral system based on party-list proportional representation.List of legislatures by country
This is a list of legislatures by country. A "legislature" is the generic name for the national parliaments and congresses that act as a plenary general assembly of representatives and that have the power to legislate. All entities included in the list of sovereign states are included in this list.Mixed-member proportional representation
Mixed-member proportional (MMP) representation is a mixed electoral system in which voters get two votes: one to decide the representative for their single-seat constituency, and one for a political party. Seats in the legislature are filled firstly by the successful constituency candidates, and secondly, by party candidates based on the percentage of nationwide or region-wide votes that each party received. The constituency representatives are elected using first-past-the-post voting (FPTP) or another plurality/majoritarian system. The nationwide or region-wide party representatives are, in most jurisdictions, drawn from published party lists, similar to party-list proportional representation. To gain a nationwide representative, parties may be required to achieve a minimum number of constituency candidates, a minimum percentage of the nationwide party vote, or both.
MMP differs from parallel voting in that the nationwide seats are allocated to political parties in a compensatory manner in order to achieve proportional election results. Under MMP, two parties that each receive 25% of the votes may both end up with 25% of the seats, even if one party wins more constituencies than the other.
MMP was originally used to elect representatives to the German Bundestag, and has been adopted by Bolivia, Lesotho and New Zealand. It was also used in Romania during its 2008 and 2012 legislative elections. In Germany, where it is used on the federal level and in most states, MMP is known as personalized proportional representation (German: personalisiertes Verhältniswahlrecht). In the United Kingdom such systems used in Scotland, Wales, and the London Assembly are referred to as additional member systems. In the Canadian province of Quebec, where an MMP model was studied in 2007, it is called the compensatory mixed-member voting system (système mixte avec compensation or SMAC).Party-list proportional representation
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 distributed 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 Finland, Brazil and the Netherlands; or for a list of candidates, as in Hong Kong.
Voters in Luxembourg's multi-seat constituencies can choose between voting for a complete list of candidates of a single party ("list vote") or voting for individual candidates from one or several lists ("panachage").
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:
The highest average method, including the D'Hondt method (or Jefferson's method) used in Albania, Argentina, Austria, Bulgaria, Croatia, Cambodia, Estonia, Finland, Israel, Poland, Spain and many other countries; and the Sainte-Laguë method (or Webster's method) used in Norway, Sweden, New Zealand, the German Bundestag, and in six German states (e.g., North Rhine-Westphalia and Bremen).
The largest remainder (LR) methods, including the Hamilton method.List proportional representation may also be combined in various hybrids, e.g., using the additional member system.
List of main apportionment methods:
Macanese "d'Hondt method" (greatly favors small parties)
Webster/Sainte-Laguë method, LR-Hare (slightly favors very small parties when unmodified, if there is no election threshold)
LR-Droop (very slightly favors larger parties)
D'Hondt method (slightly favors larger parties)
Huntington-Hill method (greatly favors larger parties)
LR-Imperiali (greatly favors larger parties)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.
In France, party lists in proportional elections must include as many candidates (and twice as many substitutes for the departmental elections) as there are seats to be allocated, whereas in other countries "incomplete" lists are allowed.Plurality voting
Plurality voting is an electoral system in which each voter is allowed to vote for only one candidate, and the candidate who polls the most among their counterparts (a plurality) is elected. In a system based on single-member districts, it may be called first-past-the-post (FPTP), single-choice voting, simple plurality or relative/simple majority. In a system based on multi-member districts, it may be referred to as winner-takes-all or bloc voting. The system is often used to elect members of a legislative assembly or executive officers. It is the most common form of the system, and is used in most elections in the United States, the lower house (Lok Sabha) in India, elections to the House of Commons and English local elections in the United Kingdom (although in the UK proportional or preferential voting is now used for elections to the Scottish and European Parliaments, Welsh, N Irish and London Assemblies, for mayors and Scottish and N Irish and some Welsh local elections) and Canada.
Plurality voting is distinguished from a majoritarian electoral system, in which, to win, a candidate must receive an absolute majority of votes, i.e., more votes than all other candidates combined. Both systems may use single-member or multi-member constituencies. In the latter case it may be referred to as an exhaustive counting system: one member is elected at a time and the process repeated until the number of vacancies is filled.
In some jurisdictions, including France and some of the United States including Louisiana and Georgia, a "two-ballot" or "runoff election" plurality system is used. This may require two rounds of voting. If on the first round no candidate receives over 50% of the votes, then a second round takes place, with just the two highest-voted candidates in the first round. This ensures that the winner gains a majority of votes in the second round. Alternatively, all candidates above a certain threshold in the first round may compete in the second round. If there are more than two candidates standing, then a plurality vote may decide the result.
In political science, the use of plurality voting with multiple, single-winner constituencies to elect a multi-member body is often referred to as single-member district plurality or SMDP. This combination is also variously referred to as winner-takes-all to contrast it with proportional representation systems. This term is sometimes also used to refer to elections for multiple winners in a particular constituency using bloc voting.Preferential voting
Preferential voting or preference voting may refer to different election systems or groups of election systems. European literature mainly uses the term for open list proportional representation, Australian literature for Single Transferable Vote or for Ranked voting, and American literature for any of them. Recently, an increasing number of authors, including David Farrell, Ian McAllister and Jurij Toplak, see preferentiality as one of the characteristics by which electoral systems can be evaluated. According to this view, all electoral methods are preferential, but to different degrees and may even be classified according to their preferentiality. Preferential voting, when understood as one of the systems or a group of systems, may refer, among other, to:
Ranked voting methods, all election methods that involve ranking candidates in order of preference
Optional preferential voting
Instant-runoff voting, referred to as "preferential voting" in Australia and as "ranked choice voting" in United States, is one type of ranked voting method.
Single transferable vote
Score voting, in which voters assign points to each candidate
Open list, sometimes known as "preferential voting" in Europe and nations such as Sri Lanka
Bucklin voting, which was sometimes known as "preferential voting" when used in the United StatesSingle transferable vote
The single transferable vote (STV) is a voting system designed to achieve proportional representation through ranked voting in multi-seat organizations or constituencies (voting districts). Under STV, an elector (voter) has a single vote that is initially allocated to their most preferred candidate. Votes are totalled and a quota (the number of votes required to win a seat) derived. If their candidate achieves quota, he/she is elected and in some STV systems any surplus vote is transferred to other candidates in proportion to the voters' stated preferences. If more candidates than seats remain, the bottom candidate is eliminated with his/her votes being transferred to other candidates as determined by the voters' stated preferences. These elections and eliminations, and vote transfers if applicable, continue until there are only as many candidates as there are unfilled seats. The specific method of transferring votes varies in different systems (see § Counting methods).
The system provides approximately proportional representation, even in non-partisan elections, and that minority factions have some representation; enables votes to be cast for individual candidates rather than for parties and party machine-controlled party lists, and – compared to first-past-the-post voting – reduces "wasted" votes (votes being wasted on losers and surplus votes being wasted on sure winners) by transferring them to other preferred candidates.
STV is the system of choice of groups such as the Proportional Representation Society of Australia (which calls it quota-preferential proportional representation), the Electoral Reform Society in the United Kingdom and FairVote in the USA (which refers to STV as fair representation voting and instant-runoff voting as ranked-choice voting, although there are other preferential voting methods that use ranked-choice ballots). Its critics contend that some voters find the mechanisms behind STV difficult to understand, but this does not make it more difficult for voters to rank the list of candidates in order of preference on an STV ballot paper (see § Voting).Southern Kanto proportional representation block
The Southern Kantō proportional representation block (Hirei [daihyō] Minami-Kantō burokku (比例[代表]南関東ブロック)) is one of eleven proportional representation (PR) "blocks", multi-member constituencies for the House of Representatives in the Diet of Japan. It consists of Southern parts of the Kantō region covering Chiba, Kanagawa and Yamanashi prefectures. Following the introduction of proportional voting it initially elected 23 representatives in the 1996 general election, then 21 after the total number of PR seats had been reduced from 200 to 180, and 22 representatives since the reapportionment of 2002.Tokyo proportional representation block
The Tōkyō proportional representation block (Hirei [daihyō] Tōkyō burokku (比例[代表]東京ブロック)) is one of eleven proportional representation (PR) "blocks", multi-member constituencies for the House of Representatives in the Diet of Japan. It consists solely of the prefecture of Tokyo making it one of two blocks covering only one prefecture, the other being Hokkaido. Following the introduction of proportional voting Tokyo elected 19 representatives by PR in the 1996 general election, and 17 since the election of 2000 when the total number of PR seats was reduced from 200 to 180.