Eleições e
participação política
- Providing an Infrastructure for Research on Electoral Democracy in the European Union (PIREDEU), the Robert Schuman Centre for Advanced Studies, the European University Institute
- Comparative Study of Electoral Systems (CSES), University of Michigan
- Constituency-Level Elections Dataset (CLE), Washington University in St.Louis
- European Election Studies
- Election Studies, International Committee for Research into Elections and Representative Democracy (ICORE)
Data can be ordered via GESIS: http://www.gesis.org - European Voter Project and Database (Evoter), the GESIS – Leibniz Institute for the Social Sciences
- Administration and Cost of Elections project (ACE), the joint project of IDEA, International Foundation for Election Systems (IFES) and the United Nations Department of Economic and Social Affairs (UN-DESA)
- IDEA Database of Electoral Systems and Voter-Turnout
- Women in Parliaments database, Inter-Parliamentary Union
