- Brett Ashley Leeds of Rice University has developed the Alliance Treaty Obligations and Provisions dataset. This dataset includes military alliances signed by all countries between 1815 and 2003. The data are available in both Stata and csv formats and be sure to note the preferred method of citing the data.
- Cingranelli and Richards Human Rights Dataset has data on human rights for 195 countries from 1981-2003. The dataset, which requires free registration to download, has 13 indicators of human rights and 2 aggregated indices.
- The Comparative Welfare States Data Set, based on data originally data collected by Evelyne Huber, Charles Ragin, and John D. Stephens, has information on welfare state development for 18 advanced industrial countries from 1960 until 2000. Data include wage information, social spending, labor force, demographic, macroeconomic, and political data.
Database of Political Institutions by Philip Keefer contains a wealth of political data on control of the chief executive and the legislature, as well as electoral rules, federalism, and checks and balances. The data cover 177 countries for the time period 1975 to 2000 and is available as a zipped Excel file.
Please note the author's preferred manner of citation.
- A. Cooper Drury at the University of Missouri-Columbia has economic sanction and humanitarian assistance data available on his website. The data are available in Stata format. Please note the author's preferred manner of citation.
- Freedom House has an annual rating of the state of freedom in all countries. The Freedom in the World country rankings are based on a country's political rights and civil liberties. Data on the level of political rights and civil liberties, as well as an overall ranking of Free, Partly Free, or Not Free, are available in an Excel spreadsheet for the years 1972 to 2003. (Data for 2004 are provided separately.)
- Governance Indicators by Daniel Kaufmann, Aart Kraay, and Massimo Mastruzzi has data on 6 dimensions of governance for 212 countries. Data is available on such indicators as Voice and Accountability, Political Stability, and Rule of Law for every other year from 1996 to 2006.
- The International Studies Association has a replication archive of some datasets from articles that have appeared in International Studies Quarterly. There is also an archive of papers that have been presented at ISA conferences from 2000 to the present.
- The Lijphart Election Archive has information on the date of elections and links to election results, electoral formulas, and constitutions for many developed and developing countries. It also has a few links to electoral result datasets.
- Political Constraints by Witold Henisz has several indicators of political constraints on executive power. The number of countries and the time period covered vary by the variable, but the most recent update extends the data to 2004. The data are available in either Access or Excel format and provision of contact information is needed to download the data and documentation.
- Political Database of the Americas has electoral data available for the countries in North and South America. The data are available only in html format. Additionally, the site contains information on constitutions, the electoral system, and the executive and legislature.
- The Political Terror Scale by Mark Gibney at the University of North Carolina-Asheville ranks 179 countries on political terror within a country. Data are available for the years 1980 to 2005 in Excel (.xls) format.
- Polity IV updates the well-known Polity dataset on regime type and transitions to 2003. The data cover all independent states with information on some countries starting in 1800. The data is available in Excel (.xls), SPSS (.sav), and comma separated value (.csv) formats. Registration is required to access the data
- Transparency International's Corruption Perceptions Index is available from two sources. Their own website has annual reports in pdf format from 1999 to 2006 here. Data are also available in Excel (for the current year) or csv format (for all of the years) from The Internet Center for Corruption Research.
- George Tsebelis has two sets of data on his website.
- The first is information on veto players for 21 advanced industrial countries. Data generally runs from 1945 to 2000, though some countries have shorter time frames. Data for each of the countries is available as a separate Excel spreadsheet.
- The second is data on the European Union, including roll call votes for three periods of time and legislation passed by cooperation or by codecision.