Bruce C. Greenwald, PhD, is one of the nation's leading economists. He currently serves as the Robert Heilbrunn Professor of Finance and Asset Management at Columbia University's Graduate School of Business. Greenwald consults worldwide on a variety of issues concerning capital markets, business strategy, corporate finance, and labor performance. He is also the author, coauthor, and editor of several books, including Value Investing: From Graham to Buffett and Beyond (Wiley) and Competition Demystified.

Judd Kahn, PhD, is currently COO of Hummingbird Management LLC. Prior to joining Hummingbird, he was an historian, the CFO of a privately owned manufacturing company, and a consultant to government and not-for-profit agencies.?Kahn cowrote Value Investing: From Graham to Buffett and Beyond and Competition Demystified with Bruce Greenwald.