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- All HBS Web
(525)
- News (110)
- Research (350)
- Multimedia (9)
- Faculty Publications (250)
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- 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.
- 22 Mar 2011
- First Look
First Look: March 22
and overly restricting access to credit and consumer choice. Nicolas Retsinas, Eric Belsky, and their colleagues aim to stimulate debate based on analysis of the opportunities and challenges presented by the various components of global... View Details
Keywords: Sean Silverthorne
- October 2021
- Article
Fintech Borrowers: Lax Screening or Cream-Skimming?
By: Marco Di Maggio and Vincent Yao
Personal credit is the fastest-growing segment of the consumer credit market, mainly driven by fintech lenders' staggering expansion. We study this market using a unique individual-level data, which covers most of the top fintech and traditional lenders, and provides... View Details
Keywords: Fintech; Lending; Consumer Finance; Credit History; Self-control; Present Bias; Financing and Loans; Personal Finance; Credit; Behavior
Di Maggio, Marco, and Vincent Yao. "Fintech Borrowers: Lax Screening or Cream-Skimming?" Review of Financial Studies 34, no. 10 (October 2021): 4565–4618. (LEAD ARTICLE and EDITOR'S CHOICE.)
- January 2020
- Article
Gifts of the Immigrants, Woes of the Natives: Lessons from the Age of Mass Migration
By: Marco Tabellini
In this paper, I jointly investigate the political and the economic effects of immigration and study the causes of anti-immigrant sentiments. I exploit exogenous variation in European immigration to U.S. cities between 1910 and 1930 induced by World War I and the... View Details
Keywords: Political Backlash; Age Of Mass Migration; Cultural Diversity; Immigration; History; Economy; Attitudes; Cross-Cultural and Cross-Border Issues; Diversity
Tabellini, Marco. "Gifts of the Immigrants, Woes of the Natives: Lessons from the Age of Mass Migration." Review of Economic Studies 87, no. 1 (January 2020): 454–486. (Also Harvard Business School Working Paper, No. 19-005, July 2018. Available also from Cato Institute, Microeconomic Insights, VOX, Broadstreet, Cato Institute, and in Oxford University Press's Blog.)
- 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.)
- 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.
- 2025
- Working Paper
Threat and Assimilation: Evidence from Refugees in Germany
By: Philipp Jaschke, Sulin Sardoschau and Marco Tabellini
This paper studies the effects of local threat on the cultural assimilation and economic integration of refugees, exploiting plausibly exogenous variation in their allocation across German regions between 2013 and 2016. We use representative survey data and... View Details
Keywords: Assimilation; Threat Hypothesis; Migration; Cultural Change; Refugees; Culture; Identity; Germany
Jaschke, Philipp, Sulin Sardoschau, and Marco Tabellini. "Threat and Assimilation: Evidence from Refugees in Germany." Harvard Business School Working Paper, No. 22-043, December 2021. (Revised January 2025. Revise and resubmit at the Economic Journal. Also available from NBER, and featured on Le Monde.)
- 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.
- 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.
- 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.)
- 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.)
- 14 Nov 2006
- First Look
First Look: November 14, 2006
Working PapersThe Business of Free Software: Enterprise Incentives, Investment, and Motivation in the Open Source Community Authors:Marco Iansiti and Gregory L. Richards Abstract In this paper, we examine the motivations of large... View Details
Keywords: Sean Silverthorne
- Article
The Pitfalls of Pricing Algorithms: Be Mindful of How They Can Hurt Your Brand
By: Marco Bertini and Oded Koenigsberg
More and more companies are relying on pricing algorithms to maximize profits. The use of artificial intelligence and machine learning enables real-time price adjustments based on supply and demand, competitors’ activities, delivery schedules, and so forth. But... View Details
Keywords: Algorithmic Pricing; Dynamic Pricing; Price; Change; Information Technology; Brands and Branding; Perception; Consumer Behavior
Bertini, Marco, and Oded Koenigsberg. "The Pitfalls of Pricing Algorithms: Be Mindful of How They Can Hurt Your Brand." Harvard Business Review 99, no. 5 (September–October 2021): 74–83.
- Forthcoming
- Article
Black Empowerment and White Mobilization: The Effects of the Voting Rights Act
By: Andrea Bernini, Giovanni Facchini, Marco Tabellini and Cecilia Testa
How did southern whites respond to the 1965 Voting Rights Act (VRA)? Leveraging
newly digitized data on county-level voter registration by race between 1956 and
1980, and exploiting pre-determined variation in exposure to the federal intervention,
we document that... View Details
Bernini, Andrea, Giovanni Facchini, Marco Tabellini, and Cecilia Testa. "Black Empowerment and White Mobilization: The Effects of the Voting Rights Act." Journal of Political Economy (forthcoming). (Also available on Vox EU and VoxDev. Featured on HBS Working Knowledge.)
- 2023
- Working Paper
Firm Purpose and Problem Wickedness: A Review of the Academic Literature
By: Caroline Adelson, Charlotte Kuller, Cate Tompkins, Ellora Sarkar, Samantha Price and Marco Iansiti
Our understanding of the firm’s role in society has evolved greatly over the past 70 years, with more recent years seeing a sharp rise in interest for how firms can contribute more than profits to society – that is, have a purpose beyond profits. Businesses engaged in... View Details
Adelson, Caroline, Charlotte Kuller, Cate Tompkins, Ellora Sarkar, Samantha Price, and Marco Iansiti. "Firm Purpose and Problem Wickedness: A Review of the Academic Literature." Harvard Business School Working Paper, No. 23-063, April 2023.
- November 2019 (Revised June 2020)
- Case
Indigo Agriculture: Harnessing Nature
By: Marco Iansiti, Michael W. Toffel and James Barnett
Indigo Agriculture used a digital-enabled research and development (R&D) process to launch its initial product, microbial coatings for agricultural seeds, which increase crop yields while reducing the need for fertilizers. In doing so, the company developed direct... View Details
Keywords: Carbon Sequestration; Operations; Supply Chain; Social Enterprise; Product Development; Distribution Channels; Business Strategy; Digital Platforms; Environmental Sustainability; Science-Based Business; Climate Change; Agriculture and Agribusiness Industry; Green Technology Industry; United States; Massachusetts
Iansiti, Marco, Michael W. Toffel, and James Barnett. "Indigo Agriculture: Harnessing Nature." Harvard Business School Case 620-024, November 2019. (Revised June 2020.)
- 12 Feb 2019
- First Look
New Research and Ideas, February 12, 2019
that hold back progress in resource mobilization research. We then propose a path ahead for future research guided by two overarching goals. First, we advocate for a process perspective, focusing attention on how an individual actor’s... View Details
Keywords: Dina Gerdeman
- 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.
- 23 Mar 2010
- First Look
First Look: March 23
press An abstract is unavailable at this time. Book: http://ceo.usc.edu/book/doing_research_that_is_useful.html Business Network Transformation in Action Authors: Marco Iansiti and Ross Sullivan Publication:... View Details
Keywords: Martha Lagace
- 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.)