The PDbA is one of the best resources of political data on the Internet providing reference materials, primary documents, comparative studies and statistical data for countries in the Western Hemisphere, including states and territories of the United States.

The information is organized under the following themes:

• Constitutions and Constitutional Studies
• Electoral Systems and Election Data
• Decentralization
• Political Parties
• Executive Institutions
• Legislative Institutions
• Judicial Instituions
• Civil Society

This non-government project is a joint venture between the Center for Latin American Studies at Georgetown University and the Unit for the Promotion of Democracy at the Organization of American States.