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Heartland Institute - Chicago based think tank promoting public policy based on individual liberty, limited government, and free markets.

Heritage Foundation - A conservative think tank that publishes research on domestic, economic, foreign and defense policy.

Hoover Institution - A think tank on the campus of Stanford University, dedicated to research in domestic policy and international affairs, committed to generating ideas that define a free society.

Hudson Institute - A public policy research organization that forecasts trends and develops solutions for governments, businesses and the public. Addresses domestic and international policy issues.