Chapel Hill Expert Survey (CHES)
Survey of experts that estimates party positioning on European integration, ideology and policy issues for national parties in a variety of European countries. Waves in 1999, 2002, 2006, 2010, 2014, 2019. Country and party coverage has increased over time to include all 277 parties in all 28 EU members plus Norway, Switzerland, and Turkey. Questions on parties' general position on European integration, various EU policies, economic & social left/right orientation, nationalism, immigration, redistribution, decentralization, environmental policy, and more. Trend file provides means of expert ratings for 1999-2019; datasets for individual waves are also available that include disaggregated expert ratings. Data in Stata or .csv.