Daniel Wolfenzon is the Stefan H. Robock Professor of Finance and Economics at Columbia Business School. He received a Masters and a PhD in economics from Harvard University and holds a BS in economics and a BS in mechanical engineering from MIT. Professor Wolfenzon previously taught at the University of Michigan, the University of Chicago and NYU. He is also a Faculty Research Fellow at the National Bureau of Economic Research. His research interests are in corporate finance and organizational economics. He has studied control sharing in small firms, the effects of investor protection on ownership concentration, and the structure of business groups around the world. His most recent research focuses on family firms. He has examined the consequences of family succession on firm performance and also the importance of managerial talent in family controlled firms. His work has been published in top economic and finance journals such as the Quarterly Journal of Economics, the Journal of Finance, and the Journal of Financial Economics. Professor Wolfenzon received the Jensen Prize (second place) for best paper on corporate finance and organizations published in the Journal of Financial Economics both in 2002 and 2005.