The Brookings Institution is an American centrist think tank based on Embassy Row in Washington, D.C., in the United States. One of Washington's oldest think tanks, Brookings conducts research and education in the social sciences, primarily in economics, metropolitan policy, governance, foreign policy, and global economy and development.[3][4] In the University of Pennsylvania's 2012 Global Go To Think Tanks Report, Brookings is ranked the most influential think tank in the world.[5]