Segnalazione bibliografica. West European Politics (March 2011), Vol. 34, N. 2, pp. 256-281 Autore: Ruben Ruiz-Rufino Abstract This article proposes a new way to measure proportionality using aggregated threshold functions. Electoral systems can be summarised by a single value that shows the necessary share of the total vote to win either one seat or half of the seats in parliament. The article calculates aggregate threshold values for 142 different electoral systems that were used in 525 democratic elections between 1946 and 2000. These results are also contrasted with the most commonly used indices of proportionality and turn out to be both substantively and empirically richer....

Although the over-representation of working-class members among the electorates of Extreme Right Parties (ERPs) in Western Europe is well documented, previous studies have usually explained this pattern as a result of this voter group's changing political preferences. In contrast to these studies, this article argues that it is not the changing political preferences of the working class that lead them to vote for ERPs, but changes in the supply side of party competition that have caused the re-orientation of these voters from left-wing parties toward the extreme right. Differentiating between an economic and a cultural dimension of party competition, it is shown that both the policy options offered by parties to voters as the salience of the two issue-dimensions have changed dramatically over the last three decades. While the salience of economic issues as well as of party system polarization among these issues have declined in most Western European countries, the very opposite trend can be identified for non-economic issues, including the core issues of ERPs (for example, immigration, and law-and-order). These changes on the supply side of party competition cause working-class voters to base their vote decisions solely on their authoritarian, non-economic preferences and not – as in the past – on their left-wing economic demands. The theoretical assumptions are tested empirically with data from the Eurobarometer Trend File for the period from 1980 to 2002. In contexts where the economic dimension is more polarized or more salient than the cultural dimension, the positive impact of being a member of the working class on the vote decision for an ERP is significantly reduced.

Segnalazione bibliografica. British Journal of Political Science (2011), 41: 287-314 Autori: David Sanders, Harold D. Clarke, Marianne C. Stewart, Paul Whiteley Abstract A six-wave 2005–09 national panel survey conducted in conjunction with the British Election Study provided data for an investigation of sources of stability and change in voters’ party preferences. The authors test competing spatial and valence theories of party choice and investigate the hypothesis that spatial calculations provide cues for making valence judgements. Analyses reveal that valence mechanisms – heuristics based on party leader images, party performance evaluations and mutable partisan attachments – outperform a spatial model in terms of strength of direct effects on party choice....

How do global sources of information such as mass media outlets, state propaganda, NGOs, and national party leadership affect aggregate behavior? Prior work on this question has insufficiently considered the complex interaction between social network and mass media influences on individual behavior. By explicitly modeling this interaction, I show that social network structure conditions media's impact. Empirical studies of media effects that fail to consider this risk bias. Further, social network interactions can amplify media bias, leading to large swings in aggregate behavior made more severe when individuals can select into media matching their preferences. Countervailing media outlets and social elites with unified preferences can mitigate the effect of bias; however, media outlets promulgating antistatus quo bias have an advantage. Theoretical results such as these generate numerous testable hypotheses; I provide guidelines for deriving and testing hypotheses from the model and discuss several such hypotheses.

Although political scandals receive unprecedented attention in the contemporary media, the knowledge of political scientists regarding the consequences of such scandals remains limited. On the basis of two nationally representative survey experiments, we investigate whether the impact of scandals depends on the traits of the politicians involved. We find substantial evidence that politicians are particularly punished for political-ideological hypocrisy, while there is less evidence that gender stereotypes matter. We also show that voters evaluate scandals in the personal lives of politicians in a highly partisan manner – other-party voters punish a politician substantially harsher than same-party voters. Interestingly, voters show no gender bias in their candidate evaluations.