Paul Johnson has been an adjunct professor at Columbia Business School for more than thirty years, teaching courses on value investing and security analysis. He contributed to two Columbia Business School Publishing books, The Most Important Thing Illuminated (2013) and Columbia Business School: A Century of Ideas (2016). Paul D. Sonkin was a portfolio manager at GAMCO Investors, Inc., where he co-managed the TETON Westwood Mighty Mites Fund, a value fund that primarily invests in micro-cap equity securities. He was for many years an adjunct professor at Columbia Business School and is coauthor of Value Investing: From Graham to Buffett and Beyond (2001). Johnson and Sonkin are coauthors of Pitch the Perfect Investment: The Essential Guide to Winning on Wall Street (2017).
