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.

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.

Abstract Under evaluative voting, the voter freely grades each candidate on a numerical scale, with the winning candidate being determined by the sum of the grades they receive. This paper compares evaluative voting with the two-round system, reporting on an experiment, conducted during the 2012 French presidential election, which attracted 2,340 participants. Here we show that the two-round system favors “exclusive” candidates, that is candidates who elicit strong feelings, while evaluative rules favor “inclusive” candidates, that is candidates who attract the support of a large span of the electorate. These differences are explained by two complementary reasons: the opportunity for the voter to support several candidates under evaluative voting rules, and the specific pattern of strategic voting under the two-round voting rule.

This article analyses the impact of party systems on human well-being and argues that multiparty systems are associated with better welfare outcomes for two primary reasons: first, multiparty systems provide representation to multiple issue-dimensions in society, thereby indicating a more inclusive system, which ensures that diverse societal interests are taken into account during formulation of welfare policies. Second, multiparty systems also indicate a competitive party system, which provides incentives for parties to perform effectively while in office and propels parties to appeal to multiple segments of society by providing broader welfare services. The impact of party systems on human well-being is tested on a global sample of 68 democratic countries from 1975–2000. The findings show support for the hypothesized relationship between party systems and human well-being.

A large literature examines the composition of cabinets in parliamentary systems, but very little attention has been paid to the size of those cabinets. Yet not only is the size of the cabinet related to the division of portfolios that may take place, cabinet size is also related to policy outcomes. In this article, a theory of party size is considered which examines how coalition bargaining considerations, intra-party politics and efficiency concerns affect the size of cabinets. Hypotheses derived from the theory are examined using an extensive cross-national dataset on coalition governments which allows us to track changes in cabinet size and membership both across and within cabinets.