This article provides a detailed set of coding rules for disaggregating electoral volatility into two components: volatility caused by new party entry and old party exit, and volatility caused by vote switching across existing parties. After providing an overview of both types of volatility in post-communist countries, the causes of volatility are analysed using a larger dataset than those used in previous studies. The results are startling: most findings based on elections in post-communist countries included in previous studies disappear. Instead, entry and exit volatility is found to be largely a function of long-term economic recovery, and it becomes clear that very little is known about what causes ‘party switching’ volatility. As a robustness test of this latter result, the authors demonstrate that systematic explanations for party-switching volatility in Western Europe can indeed be found.

A wide range of studies find that democracies experience more terrorism than non-democracies. However, surprisingly little terrorism research takes into account the variation among democracies in terms of their electoral institutions. Furthermore, despite much discussion of the differences in terrorist groups’ goals in the literature, little quantitative work distinguishes among groups with different goals, and none explores whether and how the influence of electoral institutions varies among groups with different goals. The argument in this article posits that electoral institutions influence the emergence of within-system groups, which seek policy changes, but do not influence the emergence of anti-system groups, which seek a complete overthrow of the existing regime and government. The study finds that within-system groups are significantly less likely to emerge in democracies that have a proportional representation system and higher levels of district magnitude, while neither of these factors affects the emergence of anti-system groups.

There is a contradiction between theory and empirics with respect to portfolio allocation in parliamentary democracies. While the canonical model of legislative bargaining predicts the existence of a ‘formateur bonus’, empirical studies show that portfolios are allocated in a manner that favours smaller parties. This article argues that the difference between the empirical pattern and the theoretical predictions can be explained by the vote of no confidence, which provides an incentive for large formateur parties to overcompensate smaller coalition partners in exchange for their sustained support over time. This argument is tested by exploiting variations in the presence of no confidence votes across national and regional levels in France. As predicted, we find that larger formateur parties receive a greater share of portfolios if the vote of no confidence is absent than if it is present.

Contrary to the view that linguistic homogeneity is required to create a viable demos, this article argues that linguistic diversity can be a permanent feature of any democratic community, so long as there is a unified and robust voting space that provides a common intentional object, around which distinct public spheres can aesthetically organize their political discourse. An attempt to explain how such a voting space operates in Switzerland, the finest existing exemplar of a multilingual demos, is given. Following the Swiss example, the author proposes, would go a long way to constituting the European Union as a democratically legitimate trans-national demos, despite its formidable linguistic diversity.

Abstract This article examines the electoral impact of spillover effects in local campaigns in Britain. For the first time, this is applied to the long as well as the short campaign. Using spatial econometric modelling on constituency data from the 2010 general election, there is clear empirical evidence that, in both campaign periods, the more a party spends on campaigning in constituencies adjacent to constituency i, the more votes it gets in constituency i. Of the three major political parties, the Liberal Democrats obtained the greatest electoral payoff. Future empirical analyses of voting at the constituency scale must, therefore, explicitly take account of spatial heterogeneity in order to correctly gauge the magnitude and significance of factors that affect parties' parliamentary performance.