In author Pat Dorsey—the Director of Equity Research for leading independent investment research provider Morningstar, Inc.—reveals why competitive advantages, or economic moats, are such strong indicators of great long-term investments and examines four of their most common sources: intangible assets, cost advantages, customer-switching costs, and network economics. Along the way, he skillfully outlines this proven approach and reveals how you can effectively apply it to your own investment endeavors.