Segnalazione bibliografica. Autori: Brian Greenhill; Michael D. Ward; Audrey Sacks American Journal of Political Science, Volume 55, Number 4, 1 October 2011 , pp. 991-1002(12) Abstract We present a visual method for assessing the predictive power of models with binary outcomes. This technique allows the analyst to evaluate model fit based upon the models’ ability to consistently match high-probability predictions to actual occurrences of the event of interest, and low-probability predictions to nonoccurrences of the event of interest. (https://www.speedclean.com/) Unlike existing methods for assessing predictive power...

Segnalazione bibliografica. British Journal of Political Science (2011), 41: 341-361 Autore: Jay K. Dow   Abstract This study evaluates the extent of party-system extremism in thirty-one electoral democracies as a function of electoral-system proportionality. It uses data from the Comparative Studies of Electoral Systems project to estimate the extent of party-system compactness or dispersion across polities and to determine whether more proportional systems foster greater ideological divergence among parties. Electoral system characteristics most associated with party-system compactness in the ideological space are investigated. The empirics show that more proportional systems support greater ideological dispersion, while less proportional systems encourage parties to cluster nearer the centre of the electoral space. This...

Segnalazione bibliografica. Autore: Ruth Dassonneville Acta Politica 47, 18-41 (January 2012) Abstract In this article, we investigate voter volatility and analyse the causes and motives of switching vote intentions. We test two main sets of variables linked to volatility in literature; political sophistication and political disaffection. Results show that voters with low levels of political efficacy tend to switch more often, both within a campaign and between elections. In the analysis, we differentiate between campaign volatility and inter-election volatility, and by doing so show that the dynamics of a campaign have a profound impact on volatility. The campaign period is when the lowly...

Segnalazione bibliografica. West European Politics, Volume 34, Number 5, 1 September 2011 , pp. 1070-1091(22) Autore: Pontus Odmalm Abstract Why is `the immigration issue' rarely polemical for the Swedish mainstream when it divides parties across Europe? Several factors suggest fertile ground for conflict, yet parties hesitate to capitalise on anti-immigration cues. Based on interviews with Swedish MPs, the article discusses two interlinked issues. First, immigration crystallises conflicting ideological streams: market liberalism vs. value conservatism (for the centre-right) and international solidarity vs. welfare...

Segnalazione bibliografica. American Political Science Review 01 August 2011 105: 496-515 Autore: John G. Bullock Abstract An enduring concern about democracies is that citizens conform too readily to the policy views of elites in their own parties, even to the point of ignoring other information about the policies in question. This article presents two experiments that undermine this concern, at least under one important condition. People rarely possess even a modicum of information about policies; but when they do, their attitudes seem to be affected at least as much by that information as by cues from party elites. The experiments also measure the extent...