Overview
Maureen O’Hara is the Robert W. Purcell Professor of Finance at the Johnson Graduate School of Management, Cornell University, and she also holds a Professorship at the University of Technology Sydney. 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, Universität Bern, Switzerland, and University College Dublin.
Professor O'Hara's research focuses on issues in market microstructure, and she is the author of numerous journal articles as well as the classic book Market Microstructure Theory (Blackwell: 1995). Recent research looks at the how ETFs affect market stability, liquidity issues in corporate bond markets, and corporate governance problems in banks. Dr. O'Hara also publishes widely on a broad range of topics including banking and financial intermediaries, law and finance, experimental economics, and finance and ethics, with her book “Something for Nothing: Arbitrage and Ethics on Wall Street” published this fall (Norton:2016). 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 the Executive Editor of the Review of Financial Studies, and Co-Editor of the Review of Asset Pricing Studies.
Professor O’Hara serves on the Board of Directors of NewStar Financial, a commercial finance company, and on the Board of Trustees of Teachers Insurance and Annuity Association (TIAA-CREF). She spent more than a decade on the Board of Directors of Investment Technology Group, Inc. (ITG), a global agency brokerage firm, most recently serving as Chairman of the Board. She is currently an Advisor to Symbiont IO, a fintech company focused on distributed ledger technology. She was 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), the Advisory Board of the Office of Financial Research, U.S. Treasury, and she is currently serving on the SEC Equity Market Structure Advisory Board.
She has consulted for a number of companies and organizations, including Facebook, Microsoft, Merrill Lynch, Credit Suisse, the New York Stock Exchange, Bristol-Meyers Squibb, and the World Federation of Exchanges. http://www.gsm.cornell.edu/facultybios/ohara.html
Publications
Published Papers
O'Hara, Maureen; Macey, Jonathan. "Bank Corporate Governance: A Proposal for the Post-Crisis World" American Economic Review 22.1 (2016): 85-106.
Easley, David; O'Hara, Maureen; Yang, L. "Differential Access to Price Information in Financial Markets" Journal of Financial and Quantitative Analysis 51.4 (2016): 1071-111.
Easley, D.; Lopez de Prado, M.; O'Hara, Maureen. "Discerning Information from Trade Data" Journal of Financial Economics 120.2 (2016): 269–285.
Bloomfield, Robert J.; O'Hara, Maureen; Saar, Gideon. "Hidden Liquidity: Some New Light on Dark Trading" The Journal of Finance 70.5 (2015): 2227-2274.
Easley, David; Lopez de Prado, Marcos; O'Hara, Maureen. "Optimal Execution Horizon" Mathematical Finance 25.3 (2015): 640-672.
O'Hara, Maureen. "High Frequency Market Microstructure" Journal of Financial Economics 116.2 (2015): 257-270.
O'Hara, Maureen; Yao, Chen; Ye, Mao. "What's Not There: Odd Lots and Market Data" The Journal of Finance 69.5 (2014): 2199-2236.
O'Hara, Maureen. "High-frequency Trading and Its Impact on Markets" Financial Analysts Journal 70.3 (2014): 18-27.
Easley, David; O'Hara, Maureen; Yang, Liyan. "Opaque Trading, Disclosure, and Asset Prices: Implications for Hedge Fund Regulation" Review of Financial Studies 27.4 (2014): 1190-1237.
Easley, David; Lopez de Prado, Marcos M.; O'Hara, Maureen. "The Volume Clock: Insights into the High-frequency Paradigm" Journal of Portfolio Management 39.1 (2012): 19-29.
Easley, David Alan; Lopez de Prado, M; O'Hara, Maureen. "Flow Toxicity and Liquidity in a High-frequency World" Review of Financial Studies 24.5 (2012): 1457-1493.
Aslan, H.; Easley, D.; Hvidkjaer, S.; O'Hara, Maureen. "The characteristics of informed trading: Implications for asset pricing" Journal of Empirical Finance 18.5 (2011): 782-801.
O'Hara, Maureen; Ye, Mao. "Is Market Fragmentation Harming Market Quality?" Journal of Financial Economics 100.3 (2011): 459-474.
Easley, David Alan; Lopez de Prado, Marcos M; O'Hara, Maureen. "The Exchange of Flow Toxicity" Journal of Trading 6.2 (2011): 8-13.
Easley, David Alan; Lopez de Prado, M; O'Hara, Maureen. "The Microstructure of the "Flash Crash": Flow Toxicity, Liquidity Crashes, and the Probability of Informed Trading" Journal of Portfolio Management 37.2 (2011): 118-128.
Ellis, Katrina; Michaely, Roni; O'Hara, Maureen. "Competition in Investment Banking" Review of Development Finance 1.1 (2011): 28-46.
Easley, David Alan; O'Hara, Maureen. "Microstructure and Ambiguity" The Journal of Finance 65.5 (2010): 1817?1846.
Easley, David Alan; O'Hara, Maureen. "Liquidity and Valuation in an Uncertain World" Journal of Financial Economics 97.1 (2010): 1-11.
O'Hara, Maureen. "What is a Quote?" Journal of Trading 5.2 (2010): 10-16.
Easley, David Alan; Hvidkjaer, Soeren; O'Hara, Maureen. "Factoring Information into Returns" Journal of Financial and Quantitative Analysis 45.2 (2010): 293-309.
Bloomfield, Robert J.; O'Hara, Maureen; Saar, Gideon. "How Noise Trading Affects Markets: An Experimental Analysis" Review of Financial Studies 22.6 (2009): 2275-2302.
Easley, David Alan; O'Hara, Maureen. "Ambiguity and Nonparticipation: The Role of Regulation" Review of Financial Studies 22.5 (2009): 1817-1843.
Macey, Jonathan; Miller, Geoffrey; O'Hara, Maureen; Rosenberg, Gabriel D.. "Helping Law Catch Up to Markets: Applying Broker-Dealer Law to Subprime Mortgages" Journal of Corporation Law 34.3 (2009): 789-842.
Macey, Jonathan; O'Hara, Maureen. "Regulation and Scholarship: Constant Companions or Occasional Bedfellows?" Yale Journal on Regulation 26.1 (2009): 89.
Macey, Jonathan; O'Hara, Maureen; Pompilio, David John. "Down and Out in the Stock Market: The Law and Economics of the Delisting Process" Journal of Law and Economics 51.4 (2008): 683-714.
Easley, David Alan; Engle, Robert F.; O'Hara, Maureen; Wu, Liuren. "Time-Varying Arrival Rates of Informed and Uninformed Trades" Journal of Financial Econometrics 6.2 (2008): 171-207.
O'Hara, Maureen. "Bubbles: Some Perspectives (and Loose Talk) from History" Review of Financial Studies 21.1 (2008): 17-Nov.
O'Hara, Maureen. "Optimal Microstructures" European Financial Management 13.5 (2007): 825-832.
O'Hara, Maureen; Macey, Jonathan. "From Markets to Venues: Securities Regulation in an Evolving World" Stanford Law Review 58.2 (2005): 563-616.
Macey, Jonathan; O'Hara, Maureen. "From Orders to Markets" Regulation 28.2 (2005): 62-70.
Macey, Jonathan; O'Hara, Maureen. "Best Execution Regulation: From orders to markets" Journal of Financial Transformation 13 (2005): 43-55.
O'Hara, Maureen; Macey, Jonathan. "Stock Transfer Restrictions and Issuer Choice in Trading Venues" Case Western Reserve Law Review 55.3 (2005): 587-616.
Bloomfield, Robert J.; O'Hara, Maureen; Saar, Gideon. "The "Make or Take" Decision in an Electronic Market: Evidence on the Evolution of Liquidity" Journal of Financial Economics 75.1 (2005): 165-199.
O'Hara, Maureen. "Searching for a New Center: U.S. Securities Markets in Transition" Economic Review - Federal Reserve Bank of Atlanta 89.4 (2004): 37-52.
Easley, David Alan; O'Hara, Maureen. "Information and the Cost of Capital" The Journal of Finance 59.4 (2004): 1553-1583.
O'Hara, Maureen. "Presidential address: Liquidity and price discovery" The Journal of Finance 58.4 (2003): 1335-1354.
Macey, Jonathan; O'Hara, Maureen. "The corporate governance of banks" The ICFAI Journal of Bank Management 2.3 (2003): 35-56.
Macey, Jonathan; O'Hara, Maureen. "The corporate governance of banks" Federal Reserve Bank of New York. Economic Policy Review 9.1 (2003): 91-107.
O'Hara, Maureen; Macey, Jonathan. "Solving the corporate governance problems of banks: A proposal" The Banking Law Journal 120.4 (2003): 326-348.
Ellis, Katrina; Michaely, Roni; O'Hara, Maureen. "The Making of a Dealer Market: From Entry to Equilibrium in the Trading of Nasdaq Stocks" The Journal of Finance 57.5 (2002): 2289-2316.
Easley, David; Hvidkjaer, Soeren; O'Hara, Maureen. "Is Information Risk a Determinant of Asset Returns?" The Journal of Finance 57.5 (2002): 2185-2221.
Macey, Jonathan R.; O'Hara, Maureen. "The Economics of Stock Exchange Listing Fees and Listing Requirements" Journal of Financial Intermediation 11.3 (2002): 297-319.
O'Hara, Maureen. "Designing Markets for Developing Countries" International Review of Finance 2.4 (2001): 205-216.
Easley, David Alan; O'Hara, Maureen; Saar, Gideon. "How Stock Splits Affect Trading: A Microstructure Approach" Journal of Financial and Quantitative Analysis 36.1 (2001): 25-51.
Ellis, Katrina; Michaely, Roni; O'Hara, Maureen. "The Accuracy of Trade classification Rules: Evidence from Nasdaq" Journal of Financial and Quantitative Analysis 35.4 (2000): 529-551.
Ellis, Katrina; Michaely, Roni; O'Hara, Maureen. "When the Underwriter Is the Market Maker: An Examination of Trading in the IPO Aftermarket" The Journal of Finance 55.3 (2000): 1039-1074.
Macey, Jonathan R.; O'Hara, Maureen. "The Interactions of Law, Finance, and Markets" Journal of Financial Intermediation 9.2 (2000): 113-116.
Bloomfield, Robert J.; O'Hara, Maureen. "Can Transparent Markets Survive?" Journal of Financial Economics 55.3 (2000): 425-459.
O'Hara, Maureen. "Making market microstructure matter" Financial Management 28.2 (1999): 83-90.
Ellis, Katrina; Michaely, Roni; O'Hara, Maureen. "A Guide to the Initial Public Offering Process" Corporate Finance Review 2.5 (1999)
Macey, Jonathan R.; O'Hara, Maureen. "Globalization, Exchange Governance, and the Future of Exchanges" BrookingsWharton Papers on Financial Services 2 (1999): 1-32.
Bloomfield, Robert J.; O'Hara, Maureen. "Market Transparency: Who Wins and Who Loses?" Review of Financial Studies 12.1 (1999): 5-35.
Macey, Jonathan R.; O'Hara, Maureen. "Regulating Exchanges and Alternative Trading Systems: A Law and Economics Perspective" Journal of Legal Studies 28.1 (1999): 17-54.
Bloomfield, Robert J.; O'Hara, Maureen. "Does Order Preferencing Matter?" Journal of Financial Economics 50.1 (1998): 3-37.
Easley, David; O'Hara, Maureen; Paperman, Joseph. "Financial analysts and information-based trade" Journal of Financial Markets 1.2 (1998): 175-201.
Easley, David; O'Hara, Maureen; Srinivas, P. S.. "Option Volume and Stock Prices: Evidence on Where Informed Traders Trade" The Journal of Finance 53.2 (1998): 431-465.
Working Papers
Bhattacharya, Ayan; O'Hara, Maureen. "Can ETFs Increase Market Fragility? Effect of Information Linkages in ETF Markets"
Easley, David ; O'Hara, Maureen. "How Much Trading Volume is Too Much?"
O'Hara, Maureen; Saar, Gideon; Zhong, Zhuo. "Relative Tick Size and the Trading Environment"
O'Hara, Maureen; Wang , Yihui ; Zhou , Xing. "The Execution Quality of Corporate Bonds"
O'Hara, Maureen; Bao, J.; Zhou, X.. "The Volker Rule and Bond Market Liquidity in Times of Market Stress"
Scholarly Books
O'Hara, Maureen, 2016, Something for Nothing: Arbitrage and Ethics on Wall Street, W. W. Norton & Company.
O'Hara, Maureen, 2013, High Frequency Trading: New Realities for Traders, Markets and Regulators, Risk Books.
Book Chapters
Macey, Jonathan; O'Hara, Maureen, 2016, Vertical and Horizontal Problems in Financial Regulation and Corporate Governance, in The Future of Large, Internationally Active Banks, eds Asli Demirgüç-Kunt, Douglas D. Evanoff and George G. Kaufman, World Scientific Publishing Co. Pte. Ltd.
O'Hara, Maureen, 2013, How to Prevent a Second Flash Crash, in Strengthening the Liquidity of Secondary Financial Markets, eds Richard Herring, Wharton Books.
Easley, David Alan; O'Hara, Maureen, 2003, Microstructure and asset pricing, in Handbook of the Economics of Finance, eds G. Constantinides, M. Harris, R. Stulz, Elsevier.
O'Hara, Maureen, 1998, Liquidity and Less Frequently Traded Stocks, in Equity Market Structure for Large- and Mid-Cap Stocks, eds Robert Schwartz and W. Gerke, Deutsche Borse.
Bloomfield, Robert J.; O'Hara, Maureen, 1998, Experimenting with Transparency, in Organization and Quality of Equity Markets, eds P. Davidoff, Paris University Press.