Joel Hasbrouck is the Kenneth G. Langone Professor of Business Administration and Professor of Finance at the Stern School of Business, NYU. His research focuses on the analysis, design and regulation of securities trading mechanisms (market microstructure). He is the author of Empirical Market Microstructure (Oxford, 2006) and numerous articles. He is presently an Advisory Editor of the Journal of Financial Markets, and an Associate Editor of the Journal of Financial Econometrics, the Journal of Financial Intermediation, and a former editor of the Review of Financial Studies. He holds M.A. and Ph.D. degrees from the University of Pennsylvania and a B.S. in Chemistry from Haverford College.