Hong Luo - Faculty & Research - Harvard Business School
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Hong Luo

James Dinan and Elizabeth Miller Associate Professor of Business Administration


Hong Luo is the James Dinan and Elizabeth Miller Associate Professor of Business Administration in the Strategy Unit.  Her elective course – Good Strategies in Flawed Markets – provides a market-imperfection perspective on firm strategy. She also taught the Strategy course in the MBA required curriculum.

Professor Luo’s research centers on firms’ innovation incentives, their strategies in the market for innovative ideas, and managing intellectual property rights. An integral part of her research concerns the impacts of legal regimes and public policies – in particular, intellectual property regimes and tort liability system – on firms’ innovation activities. Professor Luo’s work has appeared in leading peer-reviewed journals including Management Science, Organization Science, Journal of Law and Economics, and Journal of Economics and Management Strategy. Professor Luo currently serves as an Associate Editor at Management Science and is a member of the Editorial Board of Strategic Management Journal.

Professor Luo received her Ph.D. in Economics from Stern School of Business, New York University, where she was a recipient of the Kauffman Dissertation Fellowship in Entrepreneurship Research. A native of China, she earned an MA in Economics from Beijing University and a BA in Finance from the Renmin University of China.


Journal Publications and Edited Volumes
  1. Risk-Mitigating Technologies: The Case of Radiation Diagnostic Devices

    Alberto Galasso and Hong Luo

    We study the impact of consumers’ risk perception on firm innovation. Our analysis exploits a major surge in the perceived risk of radiation diagnostic devices following extensive media coverage of a set of over-radiation accidents involving CT scanners in late 2009. Using data on radiation diagnostic device patents and FDA product clearances, we find that the increased perception of radiation risk spurred the development of new technologies that mitigated such risk and led to a greater number of new products. Using CT scanners as a case study, we provide an in-depth characterization of two different types of risk-mitigating technologies that firms developed after the shock. Firm-level analysis shows that while firms were similarly responsive in their patenting activities, large incumbents were significantly more responsive than smaller firms in terms of new product introductions; and, in the case of CT scanners, large incumbents were also significantly more responsive in terms of the more-radical type of risk-mitigating technologies. We also provide qualitative evidence and describe patterns of equipment usage and upgrade that are consistent with increased risk perception and, consequently, a greater willingness to pay for safety. Overall, our findings suggest that changes in risk perception can be an important driver of innovation, can shape the direction of technological progress, and can impact market structure.

    Keywords: risk perception; innovation; medical devices; product liabilities; Risk and Uncertainty; Perception; Technological Innovation;

    Citation:

    Galasso, Alberto, and Hong Luo. "Risk-Mitigating Technologies: The Case of Radiation Diagnostic Devices." Management Science (forthcoming).  View Details
  2. Invest in Information or Wing It? A Model of Dynamic Pricing with Seller Learning

    Guofang Huang, Hong Luo and Jing Xia

    Pricing idiosyncratic products is often challenging because the seller, ex ante, lacks information about the demand for individual items. This paper develops a model of dynamic pricing for idiosyncratic products that features the optimal stopping structure and a seller that learns about item-specific demand through the selling process. The model is estimated using novel panel data of a leading used-car dealership. Policy experiments are conducted to quantify the value of the demand information that the dealer obtains through the initial assessment and subsequent learning in the selling process. With the dealer's average net profit per car in the estimation sample being around $1150, the initial assessment is worth around $101, and the subsequent learning in the selling process helps improve the dealer's profit by at least $269. These estimates suggest a potentially high return to taking the "information-based" approach to pricing idiosyncratic products.

    Keywords: dynamic pricing; idiosyncratic products; item-specific demand; demand uncertainty; active seller learning; the value of information; Price; Information; Value; Learning;

    Citation:

    Huang, Guofang, Hong Luo, and Jing Xia. "Invest in Information or Wing It? A Model of Dynamic Pricing with Seller Learning." Management Science 65, no. 12 (December 2019): 5556–5583.  View Details
  3. Punishing Robots: Issues in the Economics of Tort Liability and Innovation in Artificial Intelligence

    Alberto Galasso and Hong Luo

    Citation:

    Galasso, Alberto, and Hong Luo. "Punishing Robots: Issues in the Economics of Tort Liability and Innovation in Artificial Intelligence." Chap. 20 in The Economics of Artificial Intelligence, edited by Ajay K. Agrawal, Joshua Gans, and Avi Goldfarb. University of Chicago Press, 2019.  View Details
  4. Slack Time and Innovation

    Ajay Agrawal, Christian Catalini, Avi Goldfarb and Hong Luo

    Traditional innovation models assume that new ideas are developed up to the point where the benefit of the marginal project is just equal to the cost. Because labor is a key input to innovation when the opportunity cost of time is lower, such as during school breaks or time off from work, we find that such models predict the number of ideas developed will be greater, but the average quality will be lower due to the lower expected value of marginal ideas. However, we posit that slack time such as school breaks may be qualitatively different than work time because contiguous blocks may be particularly beneficial for working on complex projects. We present a model incorporating this idea that predicts that although more ideas will be produced during slack time, they will have higher average complexity and perhaps even higher average value. Using data on 165,410 projects posted on Kickstarter (2009–2015), we report findings consistent with the model's predictions.

    Keywords: crowdfunding; slack time; Innovation and Invention; Labor; Projects; Complexity; Value;

    Citation:

    Agrawal, Ajay, Christian Catalini, Avi Goldfarb, and Hong Luo. "Slack Time and Innovation." Organization Science 29, no. 6 (November–December 2018): 1056–1073.  View Details
  5. Tort Reform and Innovation

    Alberto Galasso and Hong Luo

    Current academic and policy debates focus on the impact of tort reforms on physicians’ behavior and medical costs. This paper examines whether these reforms also affect incentives to develop new technologies. We develop a theoretical model that predicts that the impact of reducing liability risks for physicians on innovation may be positive or negative, depending on the characteristics of the technology. Empirically, we find that, on average, laws that limit the liability exposure of healthcare providers are associated with a significant reduction in medical device patenting. Tort reforms have the strongest impact in medical fields in which the probability of facing a malpractice claim is the largest, and they do not seem to affect the amount of new technologies of the highest and lowest quality. Our results underscore the importance of considering dynamic effects in the economic analysis of tort laws.

    Keywords: Governing Rules, Regulations, and Reforms; Health Care and Treatment; Technological Innovation; Legal Liability; Medical Devices and Supplies Industry;

    Citation:

    Galasso, Alberto, and Hong Luo. "Tort Reform and Innovation." Journal of Law & Economics 60, no. 3 (August 2017): 385–412.  View Details
  6. Patent Publication and the Market for Ideas

    Deepak Hegde and Hong Luo

    In this paper, we study the effect of invention disclosure through patent publication on the market for ideas. We do so by analyzing the effects of the American Inventor's Protection Act of 1999 (AIPA)—which required U.S. patent applications to be published 18 months after their filing date rather than at patent grant—on the timing of licensing deals in the biomedical industry. We find that post-AIPA U.S. patent applications are significantly more likely to be licensed before patent grant and shortly after 18-month publication. Licensing delays are reduced by about 10 months, on average, after AIPA's enactment. These findings suggest a hitherto unexplored benefit of the patent system: by requiring inventions to be published through a credible, standardized, and centralized repository, it mitigates information costs for buyers and sellers and, thus, facilitates transactions in the market for ideas.

    Keywords: licensing; patent publication; invention disclosure; Patents; Information Publishing; Innovation and Invention; Knowledge Dissemination;

    Citation:

    Hegde, Deepak, and Hong Luo. "Patent Publication and the Market for Ideas." Management Science 64, no. 2 (February 2018): 652–672.  View Details
  7. Copyright Enforcement: Evidence from Two Field Experiments

    Hong Luo and Julie Holland Mortimer

    Effective dispute resolution is important for reducing private and social costs. We study how resolution responds to changes in price and communication using a new, extensive dataset of copyright infringement incidences by firms. The data cover two field experiments run by a large stock-photography agency. We find that substantially reducing the requested amount generates a small increase in the settlement rate. However, for the same reduced request, a message informing infringers of the price reduction and acknowledging the possible unintentionality generate a large increase in the settlement rate; including a deadline further increases the response. The small price effect, compared to the large message effect, can be explained by two countervailing effects of a lower price: an inducement to settle early, but a lower threat of escalation. Furthermore, acknowledging possible unintentionality may encourage settlement due to the typically inadvertent nature of these incidences. The resulting higher settlement rate prevents additional legal action and significantly reduces social costs.

    Keywords: Copyright; Law Enforcement; Lawsuits and Litigation; Cost;

    Citation:

    Luo, Hong, and Julie Holland Mortimer. "Copyright Enforcement: Evidence from Two Field Experiments." Journal of Economics & Management Strategy 26, no. 2 (Summer 2017): 499–528.  View Details
  8. Copyright Infringement in the Market for Digital Images

    Hong Luo and Julie Holland Mortimer

    Digital technologies for sharing creative goods create new opportunities for copyright infringement and challenge established enforcement methods. We establish several important facts about the nature of copyright infringement and efforts to settle past infringing use in the market for digital images. Infringement in this, and many other markets, is often uninformed—users may be unaware of their use infringement, and they may lack information about the price of a license. The uninformed nature of infringement implies that price may not be the primary factor in the decision to settle past use; in contrast, non-price factors may significantly affect settlement outcomes.

    Keywords: Technology; Creativity; Copyright;

    Citation:

    Luo, Hong, and Julie Holland Mortimer. "Copyright Infringement in the Market for Digital Images." American Economic Review: Papers and Proceedings 106, no. 5 (May 2016): 140–145.  View Details
  9. When to Sell Your Idea: Theory and Evidence from the Movie Industry

    Hong Luo

    I study a model of investment and sale of ideas and test its empirical implications using a novel data set from the market for original movie ideas. Consistent with the theoretical results, I find that buyers are reluctant to meet unproven sellers for early-stage ideas, which restricts sellers to either developing the ideas fully (to sell them later) or abandoning them. In contrast, experienced sellers can attract buyers at any stage and they sell worse ideas sooner and better ideas later. These results have important managerial implications for buyers and sellers and show that, in such contexts, policy interventions that discourage buyer participation—such as stronger intellectual-property protection—may diminish the market for ideas and hurt inexperienced sellers.

    Keywords: Strategy; Intellectual Property; Film Entertainment; Sales; Entertainment and Recreation Industry;

    Citation:

    Luo, Hong. "When to Sell Your Idea: Theory and Evidence from the Movie Industry." Management Science 60, no. 12 (December 2014): 3067–3086.  View Details
Working Papers
  1. Infringing Use as a Path to Legal Consumption: Evidence from a Field Experiment

    Hong Luo and Julie Holland Mortimer

    Digitization has transformed how users find and use copyrighted goods, but many existing legal options remain difficult to access, possibly leading to infringement. In a field experiment, we contact firms that are caught infringing on expensive digital images. Emails to all firms include a link to the licensing page of the infringed image; for treated firms, we add links to a significantly cheaper licensing option. Making infringers aware of the cheaper option leads to a fourteen-fold increase in the ex-post licensing rate, albeit from an extremely low baseline for the control rms. Two additional experimental interventions, designed to reduce search costs for (i) price and (ii) product information, also have large positive effects. Our results suggest that ex-post monetization (e.g., licensing after use) may expand the market, and that rights holders can create value by minimizing search and transactions costs.

    Keywords: copyright infringement; field experiment; Intellectual Property; Lawfulness;

    Citation:

    Luo, Hong, and Julie Holland Mortimer. "Infringing Use as a Path to Legal Consumption: Evidence from a Field Experiment." Harvard Business School Working Paper, No. 19-081, January 2019. (Revised August 2019.)  View Details
  2. Judgment Aggregation in Creative Production: Evidence from the Movie Industry

    Hong Luo, Jeffrey T. Macher and Michael Wahlen

    This paper studies a novel, light-touch approach to aggregate judgment from a large number of industry experts on ideas that they encounter in their normal course of business. Our context is the movie industry, in which customer appeal is difficult to predict and investment costs are high. The Black List, an annual publication, ranks unproduced scripts based on anonymous nominations from film executives. While low participation costs enable a high response rate from busy executives, this results in a trade-off, as the nominations lack standard criteria, and which voters see which ideas may be unobservable and affected by various factors. Despite these challenges, we find that such an approach to aggregation is predictive: listed scripts are substantially more likely to be released than observably similar but unlisted scripts, and, conditional on release and investment levels, to generate higher box office revenues. We also find that the results differ by the writer’s experience level: (i) scripts from less-experienced writers are, in fact, more likely to be listed and to rank higher if listed; (ii) but even though being listed is associated with a higher release rate within less-experienced writers, the discrepancy in release probabilities relative to experienced writers remains large (even for top-ranked scripts). Both of these results can be explained by the idea that scripts from less-experienced writers are more visible among eligible voters.

    Keywords: judgment aggregation; Creativity; Film Entertainment; Judgments; Motion Pictures and Video Industry;

    Citation:

    Luo, Hong, Jeffrey T. Macher, and Michael Wahlen. "Judgment Aggregation in Creative Production: Evidence from the Movie Industry." Harvard Business School Working Paper, No. 19-082, January 2019. (Revised September 2019.)  View Details
  3. When Does Product Liability Risk Chill Innovation? Evidence from Medical Implants

    Alberto Galasso and Hong Luo

    Liability laws designed to compensate for harms caused by defective products may also affect innovation. We examine this issue by exploiting a major quasi-exogenous increase in liability risk faced by U.S. suppliers of polymers used to manufacture medical implants. Difference-in-differences analyses show that this surge in suppliers' liability risk had a large and negative impact on downstream innovation in medical implants, but it had no significant effect on upstream polymer patenting. Our findings suggest that liability risk can percolate throughout a vertical chain and may have a significant chilling effect on downstream innovation.

    Keywords: product liability; innovation; tort; medical devices; vertical foreclosure; Legal Liability; Innovation and Invention; Laws and Statutes; Medical Devices and Supplies Industry;

    Citation:

    Galasso, Alberto, and Hong Luo. "When Does Product Liability Risk Chill Innovation? Evidence from Medical Implants." Harvard Business School Working Paper, No. 19-002, July 2018. (Revised July 2019.)  View Details
Cases and Teaching Materials
  1. Redfin: Redefine Real Estate

    Hong Luo and Huafeng Yu

    Founded in 2004, Redfin envisioned a light-touch model in which clients self-served using the digital platform in exchange for a significantly lower fee than traditional agents. Realizing the narrow appeal of its initial model, Redfin had made significant changes to its strategy while maintaining some key distinctive choices. As of 2016, Redfin served in more than 80 markets throughout the U.S., employed over 700 full-time agents, and had grown over 40% annually since 2014. With additional capital raised through an IPO, Glenn Kelman faced decisions on how to allocate these resources in order to grow. Should Redfin adjust its advertising strategy? Should it reconsider the policy of hiring lead agents only as full-time employees? Should Redfin purchase homes and hold inventories?

    Keywords: Adaptation; Growth and Development Strategy; Decision Choices and Conditions; Real Estate Industry; North America;

    Citation:

    Luo, Hong, and Huafeng Yu. "Redfin: Redefine Real Estate." Harvard Business School Case 718-430, November 2017. (Revised December 2019.)  View Details
  2. UFO Moviez—Gentle Disruption

    Hong Luo, Felix Oberholzer-Gee and Saloni Chaturvedi

    UFO Moviez is an Indian technology services provider that enables low-cost, digital delivery of films to cinemas. UFO’s satellite-based technology enables a significantly wider release of films compared to traditional analog prints and standard, higher-resolution digital prints that must be transported physically. By 2015, 54% of all cinemas in India were using UFO’s digital cinema system. UFO has achieved this without upsetting the industry’s value chain of producer–traditional distributor–cinema-owner. The company earns revenue through three main streams: fees charged to the producer/distributor for converting films to digital format and distributing them over satellite, fees charged to the cinema owner for leasing the projection systems, and advertising revenue from ads shown during the screening of films. With cinemas in India mostly digitized, however, UFO faces challenges for continual growth. Should UFO focus on increasing its advertising revenue, leveraging UFO’s core technology in other areas, or entering the business of film distribution?

    Keywords: Film Entertainment; Technology; Distribution; Disruption; Growth and Development Strategy; Technology Industry; Motion Pictures and Video Industry; India;

    Citation:

    Luo, Hong, Felix Oberholzer-Gee, and Saloni Chaturvedi. "UFO Moviez—Gentle Disruption." Harvard Business School Case 716-447, March 2016. (Revised May 2016.)  View Details