Pat Dorsey, CFA, is Director of Equity Research at Morningstar, Inc. He played an integral part in the development of the Morningstar Rating for stocks, as well as Morningstar's economic moat ratings. Dorsey is also the author of The Five Rules for Successful Stock Investing: Morningstar's Guide to Building Wealth and Winning in the Market (Wiley). He holds a master's degree in political science from Northwestern University and a bachelor's degree in government from Wesleyan University. Please visit www.findingmoats.com.