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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.