Forecasting the 2015 general election using aggregate local election data

Local government election results are used to estimate a national equivalent vote that provides the basis for a general election forecast. By-elections provide the means for calculating weighted quarterly averages of national support. These show trends similar to those obtained by national polls. By-election results in the three month period leading to the general election contribute towards the national vote share calculation and seat distributions are determined by uniform national swing. Additionally, results from the main council elections from 2011 onwards are aggregated to the parliamentary constituency level and used to estimate each party's relative performance in key target seats. This information is used to fine-tune the final seat forecast which suggests a hung parliament is the most likely outcome.     

Forecasting the 2010 general election using aggregate local election data

The paper presents a revised method for estimating national vote shares using aggregate data from local government by-elections. The model was originally developed to forecast the annual outcome of local elections but was adapted in time to provide an accurate forecast of Labour’s landslide victory at the 1997 general election. However, over the past decade the changing pattern of party competition which has seen parties becoming more selective about which elections to contest has led to more elections being excluded from the modelling because they failed to meet the exacting criteria that all three major parties, Conservative, Labour and Liberal Democrats, had contested both the by-election and the previous main election, normally held in May. Relaxing these criteria, although increasing the number of available cases would adversely affect the forecast, over- or under-estimating party votes. Instead, the revised method overcomes the problem of differential competition by estimating vote shares for parties that contest one but not both elections. A further innovation is the calculation of a weighted moving quarterly average which takes account of the number of days elapsed between the by-election date and the date of forecast. Using the new method we provide estimates for likely party shares for the 2010 general election.     

Quadratic election law

The standard form of electoral system in the United States—plurality voting with one person, one vote—suffers from countless defects, many of which stem from its failure to enable people to register the intensity of their preferences for political outcomes when they vote. Quadratic voting, an elegant alternative system proposed by Glen Weyl, provides a theoretically attractive solution to this problem but is an awkward fit with America’s legal and political traditions. We identify the legal barriers to the adoption of quadratic voting, discuss modified versions that could pass muster, and show how even a modified version would address many of the pathologies of the existing system.     

The 1984 Luxembourg election

The emergence of new interest groups and social movements in the 1960s and 1970s facilitated a participation explosion in Western democracies. With increased levels of education and improved understanding of the workings of the political process, modern citizens are now faced with a vibrant and growing market for political activism. Political parties face an especially strong challenge in this market‐place as it appears that citizens now make a succession of participatory decision, akin to impulse buying in a supermarket. It is not surprising that the market share which traditional parties retain is apparently in decline. Whether this is problematic for democracy is more open to debate than conventional models of participation would suggest.     

The 1981 Netherlands election

The Left in France. By Neill Nugent and David Lowe. London: Macmillan, 1982. Pp. xi + 275. £15.000.

Contemporary French Political Parties. Edited by David S. Bell. London: Croom Helm, 1982. Pp. 199, £13.95.     

Critical election and a new party system: Italy after the 2015 regional election

Although party system change has been widely explored, it is less so for the regional level. The article provides the first systematic attempt to discuss party system change at the regional level in Italy. Through a comprehensive overview of the five 1995–2015 regional elections, indicators of party system change, based on an original database, are explored. It will be showed that in the 2013–15 election cycle while party system fragmentation, volatility and recomposition reached their maximum high – parallel to what happened in 1995 – the level of bipolarism, one of the main features of Italian party system since the mid-1990s, dramatically dropped replaced by a three-pole configuration. These results, and their consistency with the relevant junctures at the national level in 1994 and 2013, may allow to state that a party system change at the regional level occurred and thus to consider 2013–15 elections as critical.     

Choosing a runoff election threshold

This paper investigates when a runoff election is desirable and when a plurality result is good enough. A runoff election increases the likelihood that the Condorcet winner will be elected but also entails additional costs. The metric for determining whether a runoff election is desirable will be the probability that the winner of the plurality election would win an ensuing runoff. Statistical models of voter behavior are developed that estimate this probability, which are verified with runoff-election data from United States elections. The models allow governments to make more informed choices in creating rules to decide when to hold runoff elections.     

Campaigning in an unprecedented election: issue competition in the French 2017 presidential election

Abstract

The 2017 French presidential elections featured an eventful campaign, produced astonishing results, and presented important signs of party system change. This paper analyses the main lines of divide of the demand and the supply side of electoral competition. It analyses the structure of citizens’ preferences, as well as the candidates’ strategic issue opportunities, relying on issue yield theory. To that end, it combines data from an original individual-level survey with information about the candidates’ Twitter messages. It is found that the traditional model of two-dimensional political space, characterised by an economic (left–right) and socio-cultural (integration–demarcation) dimension is largely challenged. On the supply-side, the analysis offers additional evidence for the central role played by the integration–demarcation divide, while showing that the traditional left–right conflict has not fully disappeared.     

Iran seeks stability in election

Iranians will vote on 14 June to choose a new president, four years after the re-election of Mahmoud Ahmadinejad provoked demonstrations and a brutal crackdown. Voters will focus on domestic issues such as the country's ailing economy, rather than its foreign policy and nuclear programme.