Robert L. Katz was assistant professor at the Amos Tuck School of Business Administration, Dartmouth College. Since then he has taught in the graduate schools of business at Harvard and Stanford, written three textbooks, and helped found five industrial or financial companies. Until recently he was president and chief executive officer of U.S. Natural Resources, Inc. Now he heads a consulting firm specializing in corporate strategy and is a director of a number of publicly held corporations.