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15.1. The Public Opinion Unit of the European Commission writes regular reports on Eurobarometer and Candidate Barometer Polls.
15.2. The European Election Studies group has led the way in studying voting behaviour in European elections since 1979.
15.3. The German Social Sciences Infrastructure Services is the key European archive for Eurobarometer data, and offers online access to codebooks and data.
15.3. The ‘Providing an Infrastructure for Research on Electoral Democracy in the European Union (PIREDEU) project’ (2008–11) starts from the previous studies undergone by the European Election Studies group and provides data and documents on the 2009 European Parliament elections.
15.4. The website of the European Parties Elections and Referendums Network (EPERN), coordinated by the Sussex European Institute.