Abstract
Comparative research on affective polarization provides evidence that this phenomenon is present also in parliamentary democracies. Although it has been typically understood as the difference in levels of affect toward in- and out-parties, more recent research has established the relevance of polarized feelings toward party leaders as objects of affective polarization also in parliamentary systems. While several studies have cross-sectionally examined the effect of affective polarization on turnout, recent research has taken an innovative approach by systematically comparing the impact of polarized feelings toward parties and candidates in the probability of turning out in US presidential elections, showing the primacy of the latter in predicting patterns of electoral participation. We expand the contribution of those studies by providing the first longitudinal account of the relationship between affective polarization and turnout in multi-party systems, as well as the first systematic comparison of the effects of party and leader affective polarization on turnout beyond the United States. Using post-electoral survey data covering 87 elections from 13 Western parliamentary democracies collected between 1980 and 2019, our results confirm that polarized feelings toward both parties and leaders are positively associated with turnout in parliamentary democracies. More importantly, our findings highlight the growing relevance of leader affective polarization in accounting for patterns of electoral participation. These results are robust to the use of self-reported and validated measures of turnout in selected countries, as well as different model specifications. Our conclusions contribute both theoretically and methodologically to the literature on affective polarization.