Product description 2000 Principles of Economics -- EconActive Study Guide Windows/Macintosh (CD) by David L. Carr ***ISBN-13: 9780030270222 About the Author David L. Carr is Visiting Assistant Professor of Economics at the American University in Washington DC. At AU, Prof. Carr teaches principles of micro and macro economics, economic history, and international trade. Prof. Carr lives in Fairfax, Virginia, where he enjoys golf, hiking, mountain biking and sightseeing.