He was previously a Visiting Associate Professor of Finance at the Wharton School of the University of Pennsylvania from 2008 to 2010 and a Research Fellow at Wharton Financial Institutions Center. His research focus is on understanding expected stock returns. In particular, he studies how individual and institutional investors make investment decisions that drive stock price movements, how expected returns are associated with future realized stock returns, how expected returns are formed in a dynamic international setting and how different country characteristics may be associated with expected returns. He received his Ph.D. with distinction from Columbia University.