An impressive breadth of interdisciplinary research suggests that emotions have an influence on human behavior. Nonetheless, we still know very little about the emotional states of those actors whose daily decisions have a lasting impact on our societies: politicians in parliament. We address this question by making use of methods of natural language processing and a digitized corpus of text data spanning a century of parliamentary debates in the United Kingdom. We use this approach to examine changes in aggregate levels of emotional polarity in the British parliament, and to test a hypothesis about the emotional response of politicians to economic recessions. Our findings suggest that, contrary to popular belief, the mood of politicians has become more positive during the past decades, and that variations in emotional polarity can be predicted by the state of the national economy.

Word embeddings, the coefficients from neural network models predicting the use of words in context, have now become inescapable in applications involving natural language processing. Despite a few studies in political science, the potential of this methodology for the analysis of political texts has yet to be fully uncovered. This paper introduces models of word embeddings augmented with political metadata and trained on large-scale parliamentary corpora from Britain, Canada, and the United States. We fit these models with indicator variables of the party affiliation of members of parliament, which we refer to as party embeddings. We illustrate how these embeddings can be used to produce scaling estimates of ideological placement and other quantities of interest for political research. To validate the methodology, we assess our results against indicators from the Comparative Manifestos Project, surveys of experts, and measures based on roll-call votes. Our findings suggest that party embeddings are successful at capturing latent concepts such as ideology, and the approach provides researchers with an integrated framework for studying political language.

Abstract. This article examines the influence of ideology in Canadian politics. The core theory is that political opinions are bound together into ideological clusters by underlying influences that affect simultaneously the opinions of individuals about more than one issue. The central hypothesis is that ideological disagreement between the left and the right is asymmetrical, that is, that leftists and rightists bundle in different ways their opinions about issues. The analysis draws on evidence from Benoit and Laver's survey of experts (2006) about the policy positions of political parties, the Comparative Manifesto Research Project (Budge et al., 2001; Klingemann et al., 2006), and Cross and Young's survey of Canadian political party members (2002). The results of the analysis indicate, first, that Canada's left/right ideological divide is wide by cross-national standards, and, second, that leftists and rightists organize their opinions about the world in different ways.Résumé. Cet article examine l'influence des idéologies dans l'environnement politique canadien. La théorie centrale stipule que les opinions politiques sur diverses questions sont structurées en groupes idéologiques consolidés par des influences sous-jacentes qui affectent simultanément les opinions des individus. L'hypothèse principale découlant de cette théorie est que la structure du désaccord idéologique entre la gauche et la droite est asymétrique; plus précisément, que les individus situés à la gauche et à la droite du spectre politique canadien organisent de manière différente leurs opinions politiques. L'analyse s'appuie tout d'abord sur les données d'un sondage auprès d'experts politiques réalisé par Benoit et Laver (2006) et portant sur les positions politiques des partis. Elle utilise également les données du Comparative Manifesto Research Project (Budge et al. 2001; Klingemann et al., 2006) et celles d'un sondage d'opinion de Cross et Young (2002) effectué auprès des membres de partis politiques canadiens. Les résultats de cette étude démontrent, en premier lieu, qu'il existe un clivage important entre la droite et la gauche au Canada même lorsqu'il est observé dans une perspective comparative, et en second lieu, que les individus se situant à la gauche et à la droite du spectre politique ont tendance à organiser de manière différente leurs opinions sur le monde.

Far-right parties blame immigrants for unemployment. We test the effects of the unemployment rate on public receptivity to this rhetoric. The dependent variable is anti-immigrant sentiment. The key independent variables are the presence of a far-right party and the level of unemployment. Building from influential elite-centered theories of public opinion, the central hypothesis is that a high unemployment rate predisposes citizens to accept the anti-immigrant rhetoric of far-right parties, and a low unemployment rate predisposes citizens to reject this rhetoric. The findings from cross-sectional, cross-time and cross-level analyses are consistent with this hypothesis. It is neither the unemployment rate nor the presence of a far-right party that appears to drive anti-immigrant sentiment; rather, it is the interaction between the two.