Policy over Protest: Experimental Evidence on the Drivers of Support for Movement Parties

Across the world, political parties are incorporating social movement strategies and frames. In this study, we pivot from the dominant focus on party characteristics to analyze drivers of support for movement parties in six European countries. We report results from a choice-based conjoint survey experiment showing that contrary to previous research, movement party voters favor neither candidates who are institutional outsiders nor those who actively participate in protests. Candidate policy positions are the most important driver of the vote for movement parties. Movement party voters, additionally, prefer candidates who either display anti-elitist sentiments or who want to ensure the smooth running of the current political system. These insights invite renewed attention to movement parties as an electoral vehicle whose voters prioritize decisive policy change.