A custom Google search of over 680 think tank websites. For the purposes of this search, think tanks are defined as institutions affiliated with universities, governments, advocacy groups, foundations, non-governmental organizations, and businesses that generate public policy research, analysis, and activity. The list represents a mixture of partisan and non-partisan think tanks.
"The 1889 Institute analyzes and develops state public policy for Oklahoma based on principles of limited and responsible government, free enterprise, and a robust civil society. We disseminate analysis and recommendations to policymakers and the general public."