Yacine Ait-Sahalia is the Otto A. Hack 1903 Professor of Finance and Economics and the Director of the Bendheim Center for Finance at Princeton University. He was previously an Assistant Professor (1993-96), Associate Professor (1996-98) and Professor of Finance (1998) at the University of Chicago s Graduate School of Business. His research concentrates on financial econometrics, investments, fixed-income and derivative securities, and has been published in leading academic journals.Professor Ait-Sahalia is a Fellow of the Econometric Society, a Fellow of the Institute of Mathematical Statistics, a Fellow of the American Statistical Association, an Alfred P. Sloan Foundation Research Fellow, a John Simon Guggenheim Memorial Fellow and a Research Associate for the National Bureau of Economic Research. He is also the recipient of the 1997 Michael Brennan Award, the 1998 Cornerstone Research Award, the 2001 FAME Research Award and the 2003 Dennis J. Aigner Award. He recently served as the Editor of the Review of Financial Studies and is on the Editorial Board of a number of academic finance journals. He received his Ph.D. in Economics from the Massachusetts Institute of Technology in 1993 and is a graduate of France's Ecole Polytechnique.