Replication Data for: European Institutional Integration and the Educational Divide in Support for the European Union

Since the 1950s, the history of European integration unfolds as a unique social experiment, witnessing the transformation of a non-existent entity into an increasingly institutionalized force. This article delves into the consequences of this ongoing institutionalization on public attitudes towards the institution itself: the European Union (EU). We argue that as European institutional integration advanced, a divide in EU support between more and less educated individuals emerged, with the latter becoming progressively less supportive. Drawing on data from eighty-five waves of the Eurobarometer survey across fifteen countries and over 820,000 individuals from 1976 to 2014, a Bayesian mixed-effects analysis reveals that the gap in support between the more and less educated significantly widened with a country's level of institutional integration. This study emphasizes the necessity of distinguishing institutional effects from temporal patterns in order to enhance our understanding of EU-related public opinion dynamics.