Maureen O’Hara is the Robert W. Purcell Professor of Finance at the Johnson Graduate School of Management, Cornell University. She holds degrees from the University of Illinois (B.S. Economics), and Northwestern University (M.S. Economics and Ph.D. Finance), and Honorary Doctorates from Facultés Universitaires Catholiques à Mons (FUCAM), Belgium and Universität Bern, Switzerland. Professor O'Hara's research focuses on issues in market microstructure, and she is the author of numerous journal articles as well as the book Market Microstructure Theory (Blackwell: 1995). Her most recent research looks at the role of toxicity in affecting liquidity in high frequency markets. Dr. O'Hara also publishes widely on a broad range of topics including banking and financial intermediaries, law and finance, and experimental economics. Professor O’Hara has served as President of the American Finance Association, the Western Finance Association, the Financial Management Association, the Society for Financial Studies and the International Atlantic Economic Society. She was formerly the Executive Editor of the Review of Financial Studies. Professor O’Hara is Chairman of the Board of Directors of Investment Technology Group, Inc. (ITG), a global agency brokerage firm, and she serves on the Board of Directors of NewStar Financial, a commercial finance company, where she is on the audit and governance committees. She also serves on the Board of Trustees of Teachers Insurance and Annuity Association (TIAA-CREF). She is a member of the CFTC-SEC Emerging Regulatory Issues Task Force (the “flash crash” committee), the Global Advisory Board of the Securities Exchange Board of India (SEBI), and the Advisory Board of the Office of Financial Research, U.S. Treasury. She has consulted for a number of companies and organizations, including Microsoft, Merrill Lynch, Credit Suisse, the New York Stock Exchange, Bristol-Meyers Squibb, and the World Federation of Exchanges.