"Think tanks are research institutes, which aim to influence public policy by developing and advocating policy ideas. Despite being non-(party) political, and usually without taking a corporate view, each think tank is usually associated with a particular ideological bent, and often therefore with a particular position on the political spectrum." ~Think tanks. (2009). In B. Franklin, M. Hogan, & Q. Langley, Key concepts in public relations. London, United Kingdom: Sage UK
Think Tank political orientations taken from the CQ Press Guide to Interest Groups and Lobbying in the United States, edited by Burdett A. Loomis (2012).