Leonid Kogan holds the Nippon Telephone and Telegraph chair in finance at MIT Sloan School of Management. He received his M.Sc. degree in mechanics and applied mathematics from the Moscow State University in 1993, a Ph.D. degree in mechanics from Cornell in 1995, and a Ph.D. degree in finance from MIT in 1999. Dr. Kogan taught at the Wharton School before joining MIT in 2001. During 2007-08 he was a senior researcher at Lehman Brothers. His research interests include asset pricing theory, macro-finance, empirical asset pricing, and financial engineering. Dr. Kogan's recent research has focused on the links between economic activity of firms and their stock price behavior, effects of investor heterogeneity on aggregate asset prices, and computational aspects of option pricing and portfolio choice. Dr. Kogan has published extensively in leading academic journals, including the Journal of Finance, the Journal of Financial Economics, the Journal of Political Economy, and Operations Research. His work has won numerous professional awards, including the 1998 Lehman Brothers Fellowship for Research Excellence in Finance for his work on asset pricing implications of investment irreversibility, the 2004 FAME Research Prize and the 2006 Smith-Breeden Prize for his work on price impact and survival of irrational traders, and the 2007 Crowell Memorial Prize for his work on output durability and stock returns. Dr. Kogan is currently a Research Associate of the National Bureau of Economic Research.