Data Sources

Advocacy and Public Policymaking

The authors of Lobbying and Policy Change: Who Wins, Who Loses, and Why provide the data documentation that underlies their book and related articles. The data attempts to assess the effectiveness of lobbyists to create the policy change they desire. The data analysis focused on 1999 to 2002 activity. Credit: Frank Baumgartner, Jeffery Berry, Marie Hojnacki, David Kimball, and Beth Leech. 

Amicus Curiae Networks

The scholars behind this project analyze interest group activity through contributions to court cases. The data is forthcoming, but links to published research are provided. Credit: Janet Box-Steffensmeier and Dino P. Christenson.

Congressional Bills Project

Federal Election Commission


Lobbying Disclosure Act Database

This tool provides all of the official reports submitted by lobbyist firms and clients. The reports document the organization's quarterly lobbying expenses and the bill(s) targeted for lobbying. Such reporting is legally mandated for organizations whose lobbying expenses are above the minimum designated by Congress. Credit: The United States Senate.


This site is built for citizens, and its goal is to clearly follow the money involved in national politics. See their Influence & Lobbying section to find data related to lobbying firms and non-profit organizations. Also available is information related to campaign contributions. Credit: The Center for Responsive Politics.

Policy Agendas

Sunlight Foundation's Open Government Data