Brookings Institution

An independent research and policy institute with a left-liberal inclination, which seeks to improve the performance of American institutions, the effectiveness of government programs, and the quality of U.S. public policies.
http://www.brook.edu/

Urban Institute

An institute investigating and analysing U.S. social and economic problems and issues, including the New Federalism, welfare and welfare-to-work, Medicare, and disabilities issues.
http://www.urban.org/

Economic Policy Institute

A nonpartisan think tank that seeks to broaden the public debate about strategies to achieve a prosperous and fair economy.
http://www.epinet.org/

Joint Center for Political and Economic Studies

A U.S. national, nonprofit institution that conducts research on public policy issues of special concern to African Americans.
http://www.jointcenter.org/

Progressive Policy Institute

A public policy institute shaping the Third Way agenda with progressive legislative solutions.
http://www.ppionline.org/

Worldwatch Institute

Analyzes interdisciplinary environmental data from around the world, providing information on how to build a sustainable society.
http://www.worldwatch.org/

Institute for Policy Studies

An institute for progressive research and action to create a more responsible society built around the values of justice, nonviolence, sustainability, and decency.
http://www.ips-dc.org/

Center for Defense Information

An institute monitoring the military. CDI provides independent analysis in the form of research papers, educational videos, and free e-mail and print newsletters.
http://www.cdi.org/

National Democratic Institute for International Affairs

Non-profit institute associated with the U.S. Democratic Party, working to strengthen and expand democracy worldwide.
http://www.ndi.org/

Center for National Policy

CNP undertakes research and analysis to frame options and to formulate policy recommendations, focusing activities in economic analysis, equal opportunity, community studies and foreign policy.
http://www.cnponline.org/

Center on Budget and Policy Priorities

A public policy advocacy organization specializing in federal budget issues from a low-income perspective.
http://www.cbpp.org/

Center for Law and Social Policy

CLASP is a non-profit organization with expertise in both law and policy affecting the poor. Through education, policy research and advocacy, CLASP seeks to improve the economic security of low-income families with children and secure access for low-incom
http://www.clasp.org/

Century Foundation

A research foundation that undertakes timely and critical analyses of major economic, political, and social institutions and issues
http://www.tcf.org/

Center for American Progress

A think tank offering policy proposals, talking points, events, news and columns. Weekly email newsletter Progress Report.
http://www.americanprogress.org/