Replication Data for: Italy, the EU–9, and the double-sided gap: A longitudinal analysis of mass-elite congruence on European integration (1979–2016)

The rise of constraining dissensus is widely regarded by scholars as a pivotal shift for European integration, highlighting an increasing gap between pro-European political elites and a more sceptical public. Italy emerges as a case of particular interest with regard to this phenomenon, as its longstanding pro-Europeanism eventually gave way to a major Eurosceptic turn during the 2010s. Despite the extensive literature on EU mass-elite congruence, the overall comparative longitudinal evidence on this opinion gap remains limited. To address this issue, the article uses a multi-level model for a mass-elite congruence analysis relying on data from eight surveys conducted between 1979 and 2016. Our findings provide innovative evidence of a double-sided gap: overall, political elites from pro-European parties are significantly more supportive of European integration than their voters, whereas the reverse holds true for Eurosceptics. However, this pattern does not hold for Italy, where a comparatively higher mass-elite alignment on European integration sets the country apart as an outlier within the broader European context.