ParlGov is a project directed by Holger Döring and by Philip Manow of the University of Bremen - Centre per Social Policy Research (ZeS). Its data infrastructure contains data on elections and governments for all EU and most OECD members from 1945 until today. The database, which is constantly updated and is now mirrored in the EUDO Datacentre, combines approximately 1300 parties, 630 elections (5200 results), and 870 governments (2100 cabinet parties).
Votewatch.eu is an independent website developed by the London School of Economics and the Université Libre de Bruxelles. It provides an user-friendly access to, and analysis of, the political decisions and activities of the Members of the European Parliament (MEPs) and of the EU Council of Ministers. Votewatch uses the European Parliament's own attendance, voting and activity data to give a full overview of MEP activities, broken down by nationality, national political party and European party grouping. The website covers the Parliament's activities during the entire 2004-2009 term and, starting with the 2009-2014 term, it is constantly updated following each voting session in the plenary.
EPERN (acronym for 'European Parties Elections and Referendums Network') is a network of scholars researching the impact of European integration on parties, elections and public opinion. Set up in August 2003, the network boasts a membership of more than 100 scholars and researchers across Europe and the US. EPERN publishes an ongoing series of briefings on national elections and on European Parliament elections, as well as a series of vbriefings on national referendums concerning EU membership and Treaty reforms.
Party Law in Modern Europe is an important resource for research on the legal regulation of political parties in post-war European democracies. The webssite contains a database of party laws, regulations and constitutional provisions concerning the organization political parties in Europe and beyond. Moreover, the website contains information, updates and publications related to the two main branches of the project: The Constitutional Regulation of Political Parties in Post-War Europe, funded by the UK Economic and Social Research Council (ESRC) and hosted by the Department of Political Science and International Studies (POLSIS) at the University of Birmingham, and Re-conceptualizing Party Democracy, funded by the European Research Council (ERC) and hosted by the Institute for Political Science at Leiden University.
Katz-Mair Party Organizational Data are the data-set in the form of Excel and PDF files from the volume Party Organizations: A Data Handbook on Party Organizations in Western Democracies, 1960-90, edited by Richard S Katz and Peter Mair, and originally published by Sage (London) in 1992. The data cover various aspects of party organizational development from the 1960s through to the end of the 1980s, including for each party in each country (and for the European Community party federations, where relevant) the membership levels; the qualifications, obligations, and rights of membership; the number of basic units or branches; number of paid employees; the organization of the national executive and national congress; the membership and function of these bodies; rules about candidate selection and gender representation; party finance, including sources of income and target of expenditure, as well as the rules regarding public subventions to parties. The data are reproduced here on a non-exclusive basis as a still relevant resource for comparative party research, and as a way of encouraging scholars in the field to contribute to the eventual extension and updating of the figures. The countries included in the original data set, with the original authors of the data collection and analysis also indicated, are Austria (Wolfgang C. Müller); Belgium (Kris Deschouwer); Denmark (Lars Bille); Finland (Jan Sundberg and Christel Gyllig); Germany (Thomas Poguntke and Bernhard Boll); Ireland (David M. Farrell); Italy (Luciano Bardi and Leonardo Morlino); The Netherlands (Ruud Koole and Hella van der Velde); Norway (Lars Sv?sand); Sweden (Jon Pierre and Anders Widfeldt); United Kingdom (Paul D. Webb). At a later stage we also hope to add the data for the United States (Robin Kolodny and Richard S. Katz) and for the Transnational Federations in the European Community (Luciano Bardi), both cases having been included in the original volume. OPPR and EUDO are grateful to Ken Janda for his work in preparing these data in this format.
A list of additional external resources is available here