What is a Think Tank?: Often affiliated with universities, foundations, advocacy groups, and non-governmental organizations that generate policy research and analysis. Many are ideological; others strive to be independent and non-partisan.
Selected Think Tanks:
Pew Research Center: Nonpartisan institute conducting public opinion polling, demographic research, content analysis and other data-driven social science research.
Peterson Institute for International Economics: Nonpartisan research institution devoted to study of international economic policy.