Electoral systems that are specifically designed to produce a result in which a party's proportion of seats closely reflects the proportion of votes it receives in the election are collectively known as proportional representation systems. Whereas the
single transferable vote is technically not a proportional system, but a preferential system (as is the
alternative vote), because it was not specifically designed to produce party proportionality, the results it produces are broadly proportional and in some special circumstances it will produce identical results to party list proportional representation.
List PR is the simplest form of proportional representation, it is used in many European countries, and is used in the UK to elect members of the European Parliament. Electoral districts (constituencies) are multi-member, and each party will elect the same proportion of members as the proportion of votes it receives. There are many ways to determine how candidates are elected, Finland and the UK use the
d'Hondt method, which is marginally less proportional than some other systems. The simplest implementation is the
largest remainder method. Firstly the
electoral quota must be calculated, there are several ways to do this, but the simplest is the
Hare quota, this is simply the total number of valid votes divided by the number of seats to be filled. So if there are 100,000 votes to fill 10 seats, then each candidate needs 10,000 votes to be elected. Then we divide the total number of votes each party received by the quota, and the party is allocated the the number of seats equivalent each whole quota it has received. For example if there are four parties, Red gaining 28,000, Blue 34,000, Yellow 31,000 and Green 7,000 votes respectively. Red gain 2 seats (2.8 quotas), Blue 3 seats (3.4 quotas), Yellow 3 seats (3.1 quotas) and Green 0 seats (0.7 quotas). Only 8 seats have been filled, so now we look to the largest remainders for the four parties. Red has a remainder of 0.8, Blue 0.4, Yellow 0.1 and Green 0.7. So Red gains the first of the two remaining seats, and Green the second. The election result is Red 3, Blue 3, Yellow 3, Green 1.
There is also a distinction between open and closed list systems. In the UK European elections are fought on a closed list system, which means that the order of candidates on the list is determined by party officials and voters simply vote for a political party, so in UK European elections voters can only choose between parties and not candidates. This provides party officials with plenty of patronage to hand out. Most parties can expect to gain at least one seat, and so being at the top of the list is equivalent to holding a safe seat. This encourages party loyalty, which is the purpose of patronage. On the other hand in Finland elections are always conducted on open lists. Although the party still decides which candidates are included on the list, it is the voters that decide the order of candidates on the list. Voters choose one candidate from a party, the vote goes to the party, but the candidate also receives a vote on the party list. The candidate with the most votes from people who voted for the party is placed at the top of the list, and is therefore elected first, as long as the party elects one person, it will be the person at the top of the list. Open lists dramatically reduce party patronage, although it is still the party that chooses who goes on the list.
List PR is an extremely versatile electoral system, it can work with large or small districts.
Finland has 14 districts (excluding Åland) that vary from 32 members (Uusimaa) to 7 members (North Karelia). The whole country can even be one single electoral district,
as in Israel. Voting is easy, either a vote for a single party or a single candidate. It usually produces very proportional results. When a high electoral threshold is applied to parties in list PR (that is, when parties are forced to gain a high percentage of the vote before they are entitled to elect members), it can be much less proportional.
The system used for the
German Bundestag, the
Welsh Assembly and the
Scottish Parliament. It can be thought of as a special case of List PR. In this case not all elected members are drawn from the list. The list region is also sub-divided into UK style single member plurality (SMP) voting districts. A proportion of the representatives are elected by SMP, and the remaining members are drawn from the list. Voters are given two votes, they vote for a candidate in the SMP portion of the election, and vote for a party in the list portion of the election (all current MMP elections are from closed lists, though there is no reason why open lists could not be employed). This is done so that the final assembly is proportional, parties that have members elected from the plurality portion of the election lose list seats. So a party that meets or exceeds its electoral entitlement will elect no list candidates at all. For example in the Welsh Assembly election of 2007 the Labour Party won all seven SMP seats in the region of
South Wales West, and so elected no list candidates whatsoever. It is instructive to note that the Labour Party was only entitled to six Assembly Members (AMs) for the region based on it's vote share, the fact that it gained all seven SMP seats means that it has an
overhang seat. This is a
systemic problemwith MMP. In Germany the a party would be allowed to keep it's overhang seats, but the list would also be completed in full, this means that the Bundestag can vary in size from election to election. In Wales this is not the case, whereas Labour was allowed to keep it's overhang seat, the Conservatives failed to elect a list AM that they were entitled to because the size of the Assembly is not allowed to vary, and SMP elected AMs take precedence over list AMs
The proportionality of MMP is also influenced by the proportion of top up members. The Bundestag is 50% SMP elected and 50% list elected, making it a truly proportional body. On the other hand the Welsh Assembly only has a 33.3% list element (20 out of 60), the Welsh Assembly can therefore at best be thought of as semi-proportional. For example the Conservative Party in Wales actually received more votes than Plaid Cymru in the 2007 Assembly elections, but Plaid gained more seats as the Conservatives lost out on the list portion of the election to overhang seats in
South Wales East,
South Wales West and
North Wales. The proportionality of the Welsh Assembly could be dramatically improved by abolishing the regional lists and having a nation wide list. Labour managed to elect
2 list members from one electoral region, even though they were already over-represented from the SMP portion of the election, they would have received no list members had there been a national list. A further improvement would be to increase the size of the list portion to 40 members, and therefore the size of the Assembly to 80. A national list and 50% top up would produce a much more proportional Assembly.
STV is a preferential voting system, electoral districts are multi member and voting is by listing candidates in order of preference, as in the alternative vote. The main distinction between the alternative vote and STV is that constituencies are multi-member (an STV election in a single member district is simply an AV election) and that excess votes are transfered as well as votes from candidates that have been eliminated. Because there are multiple seats per constituency candidates from the same party are in competition with one another, just like in open list PR (but not in closed list PR). The big distinction between STV and list PR is that in STV a voter is able to transfer their vote between parties, the system is designed to reduce vote wastage and to elect the preferred candidate of the voter and not the preferred party, however the evidence from Ireland is that the overwhelming majority of voters vote a strict party line vote, making the vote identical to an open list vote. Variations on STV are used in Ireland, Malta, the Australian Senate (which has a very quirky version) and elections to local authorities in Scotland. In 2004 the Richard Commission
recommended that the Welsh Assembly be elected by STV.
Once voting has finished and the votes counted the electoral quota is calculated, just like in largest remainder list PR. If a candidate reaches a quota of first preference votes then they are immediately elected. If no candidate reaches the quota, then the candidate with the lowest number of votes is eliminated and their votes redistributed.
When a candidate is elected their excess votes are redistributed. For example if the electoral quota is 10,000 and a candidate gets 15,000 first preference votes, then they are elected and the 5,000 excess votes are redistributed to second preference candidates. There are several ways that second preferences can be redistributed. For example in Ireland it is simply a random sample of 5,000 votes from the 15,000. Another way is to transfer all 15,000 votes at a rate of 1/3 of a vote each.
This elimination and redistribution of votes continues until all open seats are filled. If seats remain open with no candidate able to reach a quota, then candidates continue to be eliminated until the number of candidates remaining are the same as the
number of seats to be filled.
One of the drawbacks of STV is ballot design. All proportional systems work best when electoral districts are relatively large, which allows for the election of smaller parties. Having large constituencies makes little difference to voting and ballot design in party list PR. But STV requires that the names of all candidates be printed on the ballot. So with a theoretical district of seven members, and five parties contesting it, this produces 35 candidates, all of who will have to have their names printed on the ballot, and a voter will have to find and rank all of those candidates they wish to vote for (though ranking does not need to be exhaustive). It would seem impossible for STV to have 32 member constituencies such as the Uusimaa constituency. It has been proposed that STV districts in the UK should be between 5 and 7 members. This would be something of an improvement on the situation in Ireland where districts are between 3 and five members. It is also a problem that the order of candidates on the ballot can affect the chances of election (fails to achieve
independence of irrelevant alternatives) and STV, like all preferential voting systems can fail
monotonicity (i.e. a second placed candidate can be eliminated before a third placed candidate, though it has been estimated that this would be very rare indeed). The newly invented variant
CPO-STV seeks to remedy many of the shortcomings of STV.
AV+ is an electoral system invented by
Roy Jenkins when he undertook his review into electoral reform in 1997/98, the
Jenkins Commission. AV+ is very similar to MMP with a couple of good refinements and one deep flaw. Under AV+ the single member district (SMD) portion of the election would be conducted by the alternative vote, as opposed to SMP. This would mean that all SMD members would be elected on majorities. A further refinement of the system was the proposal to use open lists for the list portion of the system. Therefore the voter would be required to rank candidates for the SMD (AV) portion of the election, and choose a specific candidate for the list portion of the election. The flaw is the lack of real proportionality. Jenkins proposed a 15-20% top up element for the parliament, meaning that in a best case scenario only 130 members out of a parliament of 650 would be list members. This compares to 299 out of 598 (50%) in the Bundestag, 56 out of 129 (43%) in the Scottish Parliament and 20 out of 60 (33.3%) in the Welsh Assembly (which can be considered at best semi-proportional). It therefore follows that even a best case scenario 20% top up element would not produce anything resembling proportionality. Indeed the Jenkins Commission report
estimated the results of the 1992 and 1997 elections if AV+ had been used as the electoral system, giving far from proportional results.
All electoral systems have good and bad points. There is no perfect electoral system. For myself I see no real reason to use MMP when the open list PR is available, you might as well elect MPs from the whole electoral region on a list rather than only half. Likewise for me AV+ is only really an option if 50% of parliamentarians are elected from the list portion of the election.
That leaves open list PR and STV. I really like STV, it's my favourite electoral system because it is so elegant. But on balance I tend to think it is not very practical. I'd like a system where our electoral districts are between 10 and 20, and that's not possible with STV. Because the electoral regions are so small (electing 3-5 TDs) in Ireland it has lead to the dominance of a single party for much of the last century, and there are only really two and a half effective parties in the Dail. On the other hand Finland with open list PR has a large number of effective parties and electoral regions are much larger, mostly between 10 and 20 members (though there is one much larger one and three smaller than 10, excluding the special case of Åland). It has three large parties that each gain 20-25% of the vote, and a couple of medium sized parties, including the Green League and the Left Alliance, both of which poll between 5 and 10% of the vote. There are
8 parties represented in the Finnish Eduskunta, compared to
6 parties in the Irish Dail. The Dail has 5 independent TDs, and STV makes it easier for candidates not affiliated to any party to get elected. But the distribution of votes and seats is much more skewed in Ireland than it is in Finland. The biggest party in Ireland, Fianna Fail, gained 41.56% of first preference votes, and ended up with 46.6% of the seats in 2007. The biggest party in Finland, the Centre Party, gained 23.1% of the votes, and ended up with 25.5% of the seats. This disparity may well be due to the small electoral regions of Ireland, and if Finland had many more small electoral districts, each electing between 3 and 5 representatives, Finnish politics might well produce a similar pattern. When one takes into account that in STV elections voters overwhelmingly vote a straight party line vote, this effectively turns the vote into an open list vote because the competition becomes between candidates within the same party vying for first preferences from party loyalists. On the other hand STV does give voters the option of transferring votes between candidates of different parties. STV has the big advantage that voters vote for individuals and not parties. On balance though I think an open list system would produce a more balanced parliament.
So what if they did? We're not talking about a Tory government, we're talking about a coalition. Many on the left are fed up with Labour because of social and liberty issues, if a Lib-Con coalition can scrap ID cards, and give us our freedom back, many on the left would be happy with that, even if they don't like the coalition's economic policies.
What indeed? The Lib-Dem grass roots are in fact the most enthusiastic about PR, and PR would mean always having coalition governments. In fact PR would mean that the Lib-Dems would sometimes be in government with Labour, sometimes with the Tories and sometimes in opposition. Lib-Dems understand that because they support PR. Is that a difficult concept to understand?
You don't seem to understand how politics would work in a coalition. The Lib-Dems have already forced the Conservatives to move on PR by showing that they may well hold the balance of power. Coalition politics will always be a negotiation between parties, if there is a Lib-Con coalition then the parties will be partners, not adversaries. If a deal were made then a reform of the electoral system would be government policy. It was claimed in Wales that a referendum on increasing the powers of the NAfW was a "honey trap" by Labour to get Plaid support. But guess what, now we're going to have that referendum. The Lib-Dems must make sure that any coalition has a properly negotiated agreement before entering, like Plaid did with it's One Wales agreement. But reform of the electoral system will itself be a negotiation, the Lib-Dems want STV, but we might get something else because the Tories might have their own ideas. Whatever we get it must be much more proportional that what we now have. I think AV+ is out of the question as not proportional enough for the Lib-Dems, but the Tories might favour MMP or some such system.
It depends how much good faith there is, right? If one party or the other is negotiating in bad faith, and is not prepared to compromise, then it can't work. The Tories will have to understand that a coalition with the Lib-Dems is not synonymous with Lib-Dem support for an entirely Tory programme. Most politicians know this though, most have worked with politicians from other parties in the past, it's only for show that they take these diametrically opposed stances because the electoral system demands that politicians pretend that they hold no views in common whatsoever. If anything the debates have helped demolish that by showing Cameron agreeing with Both Brown and Clegg. But even if a Tory/Lib-Dem coalition fails, then the question is, do we have another election, or does the Labour party try to form a government with the Lib-Dems? If the Lib-Dems hold the balance of power, and a Tory/Lib-Dem coalition fails, there is no call for a new election, the Labour Party would be within it's rights to try to form a government with the Lib-Dems. Of course it'd be up to the Queen in the end, if Cameron dissolved the coalition and demanded the dissolution of parliament, the Queen could say no (especially very early on in the parliament), and ask the new leader of the Labour Party to try and form a government. This happened in Ireland, right? With their Rainbow Coalition.