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Show Results For
- All HBS Web
(3,754)
- People (8)
- News (554)
- Research (2,648)
- Events (29)
- Multimedia (6)
- Faculty Publications (1,247)
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- 1999
- Working Paper
Estimating the Performance Effects of Networks in Emerging Markets
By: Tarun Khanna and Jan Rivkin
- 2021
- Working Paper
Equilibrium Effects of Pay Transparency
By: Zoë B. Cullen and Bobak Pakzad-Hurson
The public discourse around pay transparency has focused on the direct effect: how workers seek
to rectify newly-disclosed pay inequities through renegotiations. The question of how wage-setting
and hiring practices of the firm respond in equilibrium has received... View Details
- March–April 2023
- Article
Market Segmentation Trees
By: Ali Aouad, Adam Elmachtoub, Kris J. Ferreira and Ryan McNellis
Problem definition: We seek to provide an interpretable framework for segmenting users in a population for personalized decision making. Methodology/results: We propose a general methodology, market segmentation trees (MSTs), for learning market... View Details
Keywords: Decision Trees; Computational Advertising; Market Segmentation; Analytics and Data Science; E-commerce; Consumer Behavior; Marketplace Matching; Marketing Channels; Digital Marketing
Aouad, Ali, Adam Elmachtoub, Kris J. Ferreira, and Ryan McNellis. "Market Segmentation Trees." Manufacturing & Service Operations Management 25, no. 2 (March–April 2023): 648–667.
- May 2023
- Article
Equilibrium Effects of Pay Transparency
By: Zoë B. Cullen and Bobak Pakzad-Hurson
The public discourse around pay transparency has focused on the direct effect: how workers seek
to rectify newly-disclosed pay inequities through renegotiations. The question of how wage-setting
and hiring practices of the firm respond in equilibrium has received... View Details
Keywords: Pay Transparency; Online Labor Market; Privacy; Wage Gap; Corporate Disclosure; Wages; Negotiation
Cullen, Zoë B., and Bobak Pakzad-Hurson. "Equilibrium Effects of Pay Transparency." Econometrica 91, no. 3 (May 2023): 765–802. (Lead Article.)
- November 2010
- Article
Capitalizing on the Underdog Effect
By: Anat Keinan, Neeru Paharia and Jill Avery
This article presents the results of a study that investigated the use of the underdog effect in marketing. The idea of triumphing over disadvantages by impassioned determination is said to be a powerfully positive image, which can lead consumers to choose a brand over... View Details
Keywords: Marketing; Brand Management; Brands; Brand Positioning; Competitive Positioning; Competition; Brands and Branding; Advertising Campaigns; Marketing Communications; Marketing Strategy; Advertising Industry; Apparel and Accessories Industry; Beauty and Cosmetics Industry; Consumer Products Industry; Fashion Industry; Food and Beverage Industry
Keinan, Anat, Neeru Paharia, and Jill Avery. "Capitalizing on the Underdog Effect." Harvard Business Review 88, no. 11 (November 2010): 32.
- 2022
- Working Paper
Stock Market Stimulus
By: Robin Greenwood, Toomas Laarits and Jeffrey Wurgler
We study the stock market effects of the arrival of the three rounds of “stimulus checks” to U.S. taxpayers and the single round of direct payments to Hong Kong citizens. The first two rounds of U.S. checks appear to have increased retail buying and share prices of... View Details
Keywords: Stock Market; COVID-19 Pandemic; Fiscal Stimulus; Stimulus Payments; Impact; Stocks; System Shocks; Price; Spending; United States; Hong Kong; China
Greenwood, Robin, Toomas Laarits, and Jeffrey Wurgler. "Stock Market Stimulus." NBER Working Paper Series, No. 29827, March 2022. (Revised November 2022.)
- Article
The Unprecedented Stock Market Reaction to COVID-19
By: Scott Baker, Nicholas Bloom, Steven J. Davis, Kyle Kost, Marco Sammon and Tasaneeya Viratyosin
No previous infectious disease outbreak, including the Spanish Flu, has impacted the stock market as forcefully as the COVID-19 pandemic. In fact, previous pandemics left only mild traces on the U.S. stock market. We use text-based methods to develop these points with... View Details
Baker, Scott, Nicholas Bloom, Steven J. Davis, Kyle Kost, Marco Sammon, and Tasaneeya Viratyosin. "The Unprecedented Stock Market Reaction to COVID-19." Review of Asset Pricing Studies 10, no. 4 (December 2020): 742–758.
- October 2014
- Module Note
Market Design in Online Businesses (Abridged)
By: Peter Coles and Benjamin Edelman
The purpose of this note is to characterize the challenges entrepreneurs may face in creating a well-functioning ecosystem of users, and to equip entrepreneurs with tools to overcome these obstacles. The note is meant to accompany the final module of the "The Online... View Details
Keywords: Platform Design; Network Effects; Market Design; Information Technology Industry; Information Industry; Advertising Industry
Coles, Peter, and Benjamin Edelman. "Market Design in Online Businesses (Abridged)." Harvard Business School Module Note 915-016, October 2014.
- October 2023
- Article
Stock Market Stimulus
By: Robin Greenwood, Toomas Laarits and Jeffrey Wurgler
We study the stock market effects of the arrival of the three rounds of “stimulus checks” to U.S. taxpayers and the single round of direct payments to Hong Kong citizens. The first two rounds of U.S. checks appear to have increased retail buying and share prices of... View Details
Keywords: Stock Market; COVID-19 Pandemic; Fiscal Stimulus; Stimulus Payments; Impact; Stocks; System Shocks; Price; Spending; United States; Hong Kong
Greenwood, Robin, Toomas Laarits, and Jeffrey Wurgler. "Stock Market Stimulus." Review of Financial Studies 36, no. 10 (October 2023): 4082–4112. (Also NBER Working Paper Series, No. 29827, January 2023.)
- January 2001
- Article
Estimating the Performance Effects of Business Groups in Emerging Markets
By: Tarun Khanna and J. Rivkin
Khanna, Tarun, and J. Rivkin. "Estimating the Performance Effects of Business Groups in Emerging Markets." Strategic Management Journal 22, no. 1 (January 2001): 45–74. (Winner of Academy of Management. Business Policy and Strategy Division. Best Paper Award presented by Academy of Management.)
- July 2020
- Article
Recovering the Logic of Double Effect for Business: Intentions, Proportionality, and Impermissible Harms
By: Rosemarie Monge and Nien-hê Hsieh
Business actors often act in ways that may harm other parties. While the law aims to restrict harmful behavior and to provide remedies, legal systems do not anticipate all contingencies and legal regulations are not always well enforced. This article argues that the... View Details
Keywords: Double Effect; Intention; Exploitation; Risk; Practical Ethics; Competition; Risk and Uncertainty; Ethics
Monge, Rosemarie, and Nien-hê Hsieh. "Recovering the Logic of Double Effect for Business: Intentions, Proportionality, and Impermissible Harms." Business Ethics Quarterly 30, no. 3 (July 2020): 361–387. (doi: 10.1017/beq.2019.39.)
- 2007
- Other Unpublished Work
Effects of Inventory on Demand for Rentals in the Home Video Market
By: Ioannis Ioannou, Julie Mortimer and Richard Mortimer
Retailer inventory decisions can greatly influence observed demand for a product by affecting, among other things, product availability (stock-outs) and product visibility in the store. These inventory decisions are affected by numerous factors including vertical... View Details
- 2008
- Working Paper
The Flattening Firm and Product Market Competition: The Effect of Trade Liberalization
By: Maria Guadalupe and Julie Wulf
This paper establishes a causal effect of competition from trade liberalization on various characteristics of organizational design. We exploit a unique panel dataset on firm hierarchies (1986-1999) of large U.S. firms and find that increasing competition leads firms... View Details
Keywords: Trade; Managerial Roles; Organizational Change and Adaptation; Organizational Design; Organizational Structure; Business Strategy; Competitive Strategy
Guadalupe, Maria, and Julie Wulf. "The Flattening Firm and Product Market Competition: The Effect of Trade Liberalization." Harvard Business School Working Paper, No. 09-067, November 2008.
- 2025
- Working Paper
Enhancing Treatment Effect Prediction on Privacy-Protected Data: An Honest Post-Processing Approach
By: Ta-Wei Huang and Eva Ascarza
As firms increasingly rely on customer data for personalization, concerns over privacy and regulatory compliance have grown. Local Differential Privacy (LDP) offers strong individual-level protection by injecting noise into data before collection. While... View Details
Keywords: Targeted Intervention; Conditional Average Treatment Effect Estimation; Differential Privacy; Honest Estimation; Post-processing; Analytics and Data Science; Consumer Behavior; Marketing
Huang, Ta-Wei, and Eva Ascarza. "Enhancing Treatment Effect Prediction on Privacy-Protected Data: An Honest Post-Processing Approach." Harvard Business School Working Paper, No. 24-034, December 2023. (Revised March 2025.)
- Article
Does 'Liking' Lead to Loving? The Impact of Joining a Brand's Social Network on Marketing Outcomes
Does “liking” a brand on Facebook cause a person to view it more favorably? Or is “liking” simply a symptom of being fond of a brand? We disentangle these possibilities and find evidence for the latter: brand attitudes and purchasing are predicted by consumers’... View Details
Keywords: Brands; Marketing Effectiveness; Brand Evaluation; Peer Influence; Brands and Branding; Social and Collaborative Networks; Social Media
John, Leslie K., Oliver Emrich, Sunil Gupta, and Michael I. Norton. "Does 'Liking' Lead to Loving? The Impact of Joining a Brand's Social Network on Marketing Outcomes." Journal of Marketing Research (JMR) 54, no. 1 (February 2017): 144–155.
- January 2023
- Module Note
Network Effects in Technology
By: Andy Wu and Matt Higgins
In business and strategy contexts, network effects are often accompanied by bandwagon (or herding) effects, positive feedback loops (or accumulated advantage effects), and market tipping (or winner-take-all dynamics). Though these phenomena are often grouped together... View Details
Wu, Andy, and Matt Higgins. "Network Effects in Technology." Harvard Business School Module Note 723-417, January 2023.
- 2009
- Working Paper
Strategic Interactions in Two-Sided Market Oligopolies
By: Emmanuel Farhi and Andrei Hagiu
Strategic interactions between two-sided platforms depend not only on whether their decision variables are strategic complements or substitutes as for one-sided firms, but also -and crucially so- on whether or not the platforms subsidize one side of the market in... View Details
Keywords: Two-Sided Markets; Strategic Complements; Strategic Substitutes; Cost; Investment; Profit; One-Sided Platforms; Two-Sided Platforms; Duopoly and Oligopoly; Competitive Advantage
Farhi, Emmanuel, and Andrei Hagiu. "Strategic Interactions in Two-Sided Market Oligopolies." Harvard Business School Working Paper, No. 08-011, August 2007. (Revised February 2009.)
- August 2012
- Teaching Note
Mekanism: Engineering Viral Marketing
By: Thales S. Teixeira
The Mekanism case introduces students to a digital media production company specialized in creating viral marketing campaigns for advertising agencies and their clients (e.g., Microsoft, AXE, eBay, Toyota, etc.). Mekanism has grown tremendously from 2007 to 2010 in... View Details
- 14 Jan 2009
- Working Paper Summaries
Smart Money: The Effect of Education, Cognitive Ability, and Financial Literacy on Financial Market Participation
- Forthcoming
- Article
The Stock Market and Bank Risk-Taking
By: David S. Scharfstein and Antonio Falato
We argue that stock market pressure to generate earnings encourages banks to increase risk. We measure risk using confidential supervisory ratings as well as financial information released in regulatory filings. We document that there is an increase in the risk-taking... View Details