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Show Results For
- All HBS Web
(441)
- News (155)
- Research (245)
- Multimedia (8)
- Faculty Publications (156)
- 2022
- Working Paper
Retail Investors’ Contrarian Behavior Around News, Attention, and the Momentum Effect
By: Cheng (Patrick) Luo, Enrichetta Ravina, Marco Sammon and Luis M. Viceira
Using a large panel of U.S. brokerage accounts trades and positions, we show that a large fraction of retail investors trade as contrarians after large earnings surprises, especially for loser stocks, and that such contrarian trading contributes to post earnings... View Details
Keywords: Retail Investors; Post Earnings Announcement Drift; Price Momentum; Behavioral Finance; Investment; Demographics
Luo, Cheng (Patrick), Enrichetta Ravina, Marco Sammon, and Luis M. Viceira. "Retail Investors’ Contrarian Behavior Around News, Attention, and the Momentum Effect." Working Paper, June 2022.
- 21 Dec 2015
- News
Why the NFL gets a failing grade at Harvard Business School
- November 2020 (Revised September 2021)
- Case
HP Instant Ink: (Self) Disrupting the Consumer Printing Market
By: Elie Ofek, Marco Bertini, Oded Koenigsberg and George Gonzalez
Seeking to disrupt the consumer printing market (before being disrupted by others), and in response to customer pain points, in 2013 HP Inc. launched an ink replenishment service called Instant Ink, where customers pay a monthly subscription fee based on the number of... View Details
Keywords: Printing; Ink; Subscription Model; Customers; Information Infrastructure; Service Delivery; Business Model; Disruption; Growth and Development Strategy
Ofek, Elie, Marco Bertini, Oded Koenigsberg, and George Gonzalez. "HP Instant Ink: (Self) Disrupting the Consumer Printing Market." Harvard Business School Case 521-016, November 2020. (Revised September 2021.)
- October 1996 (Revised April 1997)
- Case
Team New Zealand (A)
By: Marco Iansiti and Alan D. MacCormack
The case describes the development process used by Team New Zealand to design their two yachts for the 1995 America's Cup. During development, the team makes extensive use of simulation and physical prototyping to improve the initial design concept. As they approach... View Details
Keywords: Product Design; Design; Product Development; Sports; Ship Transportation; Research and Development; Situation or Environment; Decisions; Sports Industry; New Zealand
Iansiti, Marco, and Alan D. MacCormack. "Team New Zealand (A)." Harvard Business School Case 697-040, October 1996. (Revised April 1997.)
- Article
The Value of Trading Relations in Turbulent Times
By: Marco Di Maggio, Amir Kermani and Zhaogang Song
This paper investigates how dealers’ trading relations shape their trading behavior in the corporate bond market. Dealers charge lower spreads to dealers with whom they have the strongest ties and more so during periods of market turmoil. Systemically important dealers... View Details
Keywords: OTC Markets; Network; Corporate Bonds; Crisis; Intermediation Chains; Leaning Against The Wind; Networks; Bonds; Behavior; Financial Crisis
Di Maggio, Marco, Amir Kermani, and Zhaogang Song. "The Value of Trading Relations in Turbulent Times." Journal of Financial Economics 124, no. 2 (May 2017): 266–284.
- 13 Apr 2010
- First Look
First Look: April 13
by deviating frequently and in predictable ways from the recommendations offered by a centralized capacity planning model. Finally, we document that these discretionary capacity supply decisions exhibit a... View Details
Keywords: Martha Lagace
- Article
Entry into Platform-based Markets
By: Feng Zhu and Marco Iansiti
This paper examines the relative importance of platform quality, indirect network effects, and consumer expectations on the success of entrants in platform-based markets. We develop a theoretical model and find that an entrant's success depends on the strength of... View Details
Keywords: Platform-based Markets; Winnter-take-all; First-mover Advantage; Indirect Network Effects; Video Game Industry; Quality; Network Effects; Market Entry and Exit; Digital Platforms; Motion Pictures and Video Industry
Zhu, Feng, and Marco Iansiti. "Entry into Platform-based Markets." Strategic Management Journal 33, no. 1 (January 2012): 88–106.
- 2021
- Working Paper
Time and the Value of Data
By: Ehsan Valavi, Joel Hestness, Newsha Ardalani and Marco Iansiti
Managers often believe that collecting more data will continually improve the accuracy of their machine learning models. However, we argue in this paper that when data lose relevance over time, it may be optimal to collect a limited amount of recent data instead of... View Details
Keywords: Economics Of AI; Machine Learning; Non-stationarity; Perishability; Value Depreciation; Analytics and Data Science; Value
Valavi, Ehsan, Joel Hestness, Newsha Ardalani, and Marco Iansiti. "Time and the Value of Data." Harvard Business School Working Paper, No. 21-016, August 2020. (Revised November 2021.)
- June 2025
- Article
In the Red: Overdrafts, Payday Lending and the Underbanked
By: Marco Di Maggio, Angela Ma and Emily Williams
The reordering of transactions from “high-to-low” is a controversial bank practice thought to maximize fees paid by low-income customers on overdrawn accounts. We exploit multiple class-action lawsuits resulting in mandatory changes to this practice, coupled with... View Details
Keywords: Overdraft; Payday Loans; Excessive Fees; Underbanked; Underserved; Income; Personal Finance; Borrowing and Debt; Banks and Banking
Di Maggio, Marco, Angela Ma, and Emily Williams. "In the Red: Overdrafts, Payday Lending and the Underbanked." Journal of Finance 80, no. 3 (June 2025): 1691–1738.
- December 2020
- Article
Consumer Reactance to Promotional Favors
By: Marco Bertini and Aylin Aydinli
Promotional favors are an increasingly popular but seldom researched form of price promotion where the receipt of the saving by consumers depends on an action on their part that is nonmonetary in nature, such as completing a questionnaire, posting a review, or making a... View Details
Keywords: Promotional Favors; Conditional Discounts; Psychological Reactance; Price Promotions; Pricing; Marketing; Price; Consumer Behavior
Bertini, Marco, and Aylin Aydinli. "Consumer Reactance to Promotional Favors." Journal of Retailing 96, no. 4 (December 2020): 578–589.
- July 2022
- Article
The Pass-Through of Uncertainty Shocks to Households
By: Marco Di Maggio, Amir Kermani, Rodney Ramcharan, Vincent Yao and Edison Yu
Using new employer-employee matched data, this paper investigates the impact of uncertainty, as measured by idiosyncratic stock market volatility, on individual outcomes. We find that firms provide at best partial insurance to their workers. An increase in firm-level... View Details
Keywords: Employment Risk; Consumption; Employment; Risk and Uncertainty; System Shocks; Insurance; Household; Spending
Di Maggio, Marco, Amir Kermani, Rodney Ramcharan, Vincent Yao, and Edison Yu. "The Pass-Through of Uncertainty Shocks to Households." Journal of Financial Economics 145, no. 1 (July 2022): 85–104. (2023 Fama-DFA Prize for the Best Paper Published in the Journal of Financial Economics in Asset Pricing, 2nd place.)
- December 2008 (Revised February 2010)
- Case
ViniBrasil: New Latitude Wines
By: David E. Bell, Marcos Flava Neves, Luciano Thome e Castro and Mary Louise Shelman
ViniBrasil is a small wine venture in Brazil started by a top Portuguese wine company, Dao Sul. ViniBrasil grows its grapes in a novel environment (close to the equator) using innovative management practices such as controlled irrigation and year-round harvesting.... View Details
Keywords: Agribusiness; Global Strategy; Innovation and Invention; Management Practices and Processes; Demand and Consumers; Competition; Agriculture and Agribusiness Industry; Food and Beverage Industry; Brazil
Bell, David E., Marcos Flava Neves, Luciano Thome e Castro, and Mary Louise Shelman. "ViniBrasil: New Latitude Wines." Harvard Business School Case 509-003, December 2008. (Revised February 2010.)
- Web
Working Knowledge | Harvard Business School
Finance and Investing Analyst Rules Mean More Disclosure, But Less Information Featuring Yuan Zou . By Rachel Layne on July 21, 2025 . Economics and Global Commerce Mapping the Salt Tax That Helped Shatter a Monarchy Featuring View Details
- 11 Dec 2018
- First Look
New Research and Ideas, December 11, 2018
Publisher's link: https://www.hbs.edu/faculty/Pages/item.aspx?num=55344 Happily Ever After: Immigration, Natives' Marriage and Fertility By: Carlana, Michela, and Marco Tabellini Abstract—In this paper, we... View Details
Keywords: Dina Gerdeman
- Working Paper
Index Rebalancing and Stock Market Composition: Do Indexes Time the Market?
By: Marco Sammon and John J. Shim
Value-weighted indexes must rebalance in response to stock market composition changes, e.g., issuance, buybacks, and IPOs. In doing so, existing index funds implicitly engage in market timing. Index funds’ long-short rebalancing portfolios have a -3.5% annual return... View Details
Sammon, Marco, and John J. Shim. "Index Rebalancing and Stock Market Composition: Do Indexes Time the Market?" SSRN Working Paper Series, No. 5080459, May 2025.
- Article
The Unintended Consequences of the Zero Lower Bound Policy
By: Marco Di Maggio and Marcin Kacperczyk
We study the impact of the zero lower bound interest rate policy on the industrial organization of the U.S. money fund industry. We find that in response to policies that maintain low interest rates, money funds change their product offerings by investing in riskier... View Details
Keywords: Quantitative Easing; Money Market Funds; Reaching For Yield; Risk Taking; Fund Exit; Unconventional Monetary Policy; Investment Funds; Interest Rates
Di Maggio, Marco, and Marcin Kacperczyk. "The Unintended Consequences of the Zero Lower Bound Policy." Journal of Financial Economics 123, no. 1 (January 2017): 59–80.
- 5 Nov 2005 - 8 Nov 2005
- Conference Presentation
New Perspectives on the Business Value of IT
By: David James Brunner, Bradley R. Staats and Marco Iansiti
We sought to unravel the link between IT investment and firm performance by examining deployed IT functionality (ITF). First, ITF appears to be an important link in the IT spend to business value chain. Second, ITF does not seem to be a commodity and has... View Details
- 2021
- Working Paper
Invisible Primes: Fintech Lending with Alternative Data
By: Marco Di Maggio, Dimuthu Ratnadiwakara and Don Carmichael
We exploit anonymized administrative data provided by a major fintech platform to investigate whether using alternative data to assess borrowers’ creditworthiness results in broader credit access. Comparing actual outcomes of the fintech platform’s model to... View Details
Keywords: Fintech Lending; Alternative Data; Machine Learning; Algorithm Bias; Finance; Information Technology; Financing and Loans; Analytics and Data Science; Credit
Di Maggio, Marco, Dimuthu Ratnadiwakara, and Don Carmichael. "Invisible Primes: Fintech Lending with Alternative Data." Harvard Business School Working Paper, No. 22-024, October 2021.
- Article
The Future of Economic, Business, and Social History
By: G. Jones, Marco H.D. van Leeuwen and Stephen Broadberry
Three leading scholars in the fields of business, economic, and social history review the current state of these disciplines and reflect on their future trajectory. Geoffrey Jones reviews the development of business history since its birth at the Harvard Business... View Details
Keywords: Economic History; Business History; History; Asia; Africa; Europe; Latin America; North and Central America
Jones, G., Marco H.D. van Leeuwen, and Stephen Broadberry. "The Future of Economic, Business, and Social History." Scandinavian Economic History Review 60, no. 3 (2012): 225–253.
- October 22, 2012
- Article
Interest Rate Pass-Through: Mortgage Rates, Household Consumption, and Voluntary Deleveraging
By: Marco Di Maggio, Amir Kermani, Benjamin Keys, Tomasz Piskorski, Rodney Ramcharan, Amit Seru and Vincent Yao
Exploiting variation in the timing of resets of adjustable-rate mortgages (ARMs), we find that a sizable decline in mortgage payments (up to 50%) induces a significant increase in car purchases (up to 35%). This effect is attenuated by voluntary deleveraging. Borrowers... View Details
Keywords: Monetary Policy; Household Finance; Refinancing; Contract Rigidities; Debt Rigidity; MPC; Deleveraging; Personal Finance; Household; Policy; Borrowing and Debt; Macroeconomics
Di Maggio, Marco, Amir Kermani, Benjamin Keys, Tomasz Piskorski, Rodney Ramcharan, Amit Seru, and Vincent Yao. "Interest Rate Pass-Through: Mortgage Rates, Household Consumption, and Voluntary Deleveraging." American Economic Review 107, no. 11 (November 2017): 3550–3588. (Note: this is a combined version of working papers Monetary Policy Pass-Through: Household Consumption and Voluntary Deleveraging by M. Di Maggio, A. Kermani and R. Ramcharan previously Revise & Resubmit at American Economic Review and Mortgage Rates, Household Balance Sheets, and the Real Economy by B. Keys, T. Piskorski, A. Seru, and V. Yao previously Revise and Resubmit at Journal of Political Economy.)