Harold L. Vogel, Ph.D., CFA, is CEO of Vogel Capital Management in New York City and former Adjunct Professor of Finance and Economics, Columbia University Graduate School of Business. He is author of Financial Market Bubbles and Crashes, 2nd ed (spring 2018), Entertainment Industry Economics, (10th ed. forthcoming 2019), and Travel Industry Economics, (3nd ed. (2016). Articles include "An Analytical Review of Volatility Metrics for Bubbles and Crashes (with R. Werner), International Review of Financial Analysis, March 2015.