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Show Results For
- All HBS Web
(3,810)
- People (6)
- News (663)
- Research (2,678)
- Events (46)
- Multimedia (43)
- Faculty Publications (1,495)
- June 2025
- Article
Passive Ownership and Price Informativeness
By: Marco Sammon
I show that passive ownership negatively affects the degree to which stock prices anticipate earnings announcements. Estimates across several research designs imply that the rise in passive ownership over the last 30 years has caused the amount of information... View Details
Keywords: Passive Ownership; ETFs; Market Efficiency; Price; Investment Funds; Stocks; Communication
Sammon, Marco. "Passive Ownership and Price Informativeness." Management Science 71, no. 6 (June 2025): 4582–4598.
- 2020
- Working Paper
Demystifying the Math of the Coronavirus
By: Elon Kohlberg and Abraham Neyman
We provide an elementary mathematical description of the spread of the coronavirus. We explain two fundamental relationships: How the rate of growth in new infections is determined by the “effective reproductive number” and how the effective reproductive number is... View Details
Kohlberg, Elon, and Abraham Neyman. "Demystifying the Math of the Coronavirus." Harvard Business School Working Paper, No. 20-112, April 2020. (Revised May 2020.)
- 2012
- Article
When Does the Glue of Social Ties Dissolve? Syndication Ties and Performance Cues in Withdrawals from Venture Capital Syndicates, 1985-2009
By: Pavel Zhelyazkov
The present study integrates the economic and social perspectives on the stability of collaboration by exploring how performance cues interact with interorganizational embeddedness in affecting firms' withdrawals from venture capital coinvestment syndicates. It finds... View Details
- September 1992 (Revised October 1992)
- Case
Acid Rain: The Southern Co. (B)
In addition to the issues of expected cost minimization elucidated in Acid Rain: The Southern Co. (A), problems involving regulatory uncertainty are critical to the firm's Clean Air Act compliance strategy. The regulatory uncertainty affects, and is affected by, the... View Details
Keywords: Energy Generation; Business Strategy; Environmental Sustainability; Cost vs Benefits; Risk and Uncertainty; Strategic Planning; Investment Return; Government Legislation; Wastes and Waste Processing; Business and Government Relations; Utilities Industry; Energy Industry; United States
Reinhardt, Forest L. "Acid Rain: The Southern Co. (B)." Harvard Business School Case 793-040, September 1992. (Revised October 1992.)
- 01 Oct 2013
- News
Lehman Brothers Plus Five: Have We Learned from Our Mistakes?
- 09 Apr 2021
- News
The Power of Why: Unlocking a Curious Mind
- February 2019 (Revised July 2019)
- Case
Sales Force Management at Nobel Ilac
By: Doug J. Chung and Gamze Yucaoglu
Nobel Ilac was a Turkish generic pharmaceutical company marketing more than 100 drugs in 20 countries and, as of 2017, had over 2,500 employees worldwide. Nobel had implemented a transformation strategy—more specifically, a customer segmentation plan—whereby the sales... View Details
Keywords: Sales Strategy; Compensation; Employee Retention; Recruiting; Pharmaceuticals; Salesforce Management; Strategy; Organizational Design; Human Resources; Compensation and Benefits; Employees; Retention; Recruitment; Pharmaceutical Industry; Turkey
Chung, Doug J., and Gamze Yucaoglu. "Sales Force Management at Nobel Ilac." Harvard Business School Case 519-067, February 2019. (Revised July 2019.)
- 2023
- Working Paper
Distributionally Robust Causal Inference with Observational Data
By: Dimitris Bertsimas, Kosuke Imai and Michael Lingzhi Li
We consider the estimation of average treatment effects in observational studies and propose a new framework of robust causal inference with unobserved confounders. Our approach is based on distributionally robust optimization and proceeds in two steps. We first... View Details
Bertsimas, Dimitris, Kosuke Imai, and Michael Lingzhi Li. "Distributionally Robust Causal Inference with Observational Data." Working Paper, February 2023.
- August 2018 (Revised July 2020)
- Case
Revenue Recognition at HBP
By: Paul Healy and Siko Sikochi
In early 2014, Paul Bills, CFO of Harvard Business Publishing (HBP), sat down with David Wan, the company’s CEO, to discuss budget preparations for the coming year. Bills noted that the performance of Corporate Learning, one of HBP’s three business units, would be... View Details
Keywords: Accrual Accounting; Budgets and Budgeting; Revenue Recognition; Financial Reporting; Publishing Industry; Education Industry; United States
Healy, Paul, and Siko Sikochi. "Revenue Recognition at HBP." Harvard Business School Case 119-029, August 2018. (Revised July 2020.)
- December 2017
- Article
Discordant vs. Harmonious Selves: The Effects of Identity Conflict and Enhancement on Sales Performance in Employee-Customer Interactions
By: Lakshmi Ramarajan, Nancy Rothbard and Steffanie Wilk
Across multiple studies, we examine how identity conflict and enhancement within people affect performance in tasks that involve interactions between people through two mechanisms: role-immersion, operationalized as intrinsic motivation, and role-taking,... View Details
Ramarajan, Lakshmi, Nancy Rothbard, and Steffanie Wilk. "Discordant vs. Harmonious Selves: The Effects of Identity Conflict and Enhancement on Sales Performance in Employee-Customer Interactions." Academy of Management Journal 60, no. 6 (December 2017): 2208–2238.
- December 2018
- Supplement
iyzico: Fundraising in Emerging Markets (B)
By: Marco Di Maggio and Gamze Yucaoglu
The case opens in July 2016 as Barbaros Ozbugutu, co-founder and CEO of the Istanbul-based payment technology start-up iyzico, contemplates the pros and cons of the different term sheets the company has received for its Series C round. The case then informs the reader... View Details
Keywords: Iyzico; Fundraising; Business Startups; Venture Capital; Emerging Markets; Negotiation Offer; Decision Choices and Conditions
Di Maggio, Marco, and Gamze Yucaoglu. "iyzico: Fundraising in Emerging Markets (B)." Harvard Business School Supplement 219-065, December 2018.
- May 2018
- Article
The Changing Craft of Selling
By: Frank V. Cespedes and Tiffani Bova
This article draws on two surveys: one with more than 3,100 sales professionals about trends affecting the role(s) of sales in their companies, and the other with over 7,000 consumer and business buyers about their expectations when dealing with sales people. The... View Details
- April 1990 (Revised December 1995)
- Case
SouthPark IV
A young entrepreneur examines an 80,000 square foot office/warehouse building as a potential acquisition. The building is currently fully leased but all four leases will expire shortly. Due to changing market conditions, the protagonist has to look at current market... View Details
Keywords: Mergers and Acquisitions; Valuation; Property; Management Analysis, Tools, and Techniques; Leasing; Cash Flow; Real Estate Industry
Poorvu, William J. "SouthPark IV." Harvard Business School Case 390-181, April 1990. (Revised December 1995.)
- 31 Oct 2015
- News
Social networks, ethnicity and entrepreneurship
- 28 May 2013
- News
10 Questions to Ask When Determining Your Salary
- 15 Sep 2016
- News
Competing Against Luck
- 04 Dec 2012
- First Look
First Look: December 4
are incompatible mediated the relationship between ambient cultural disharmony and creativity. Alternative mechanisms such as negative affect and cognitive disruption were not viable mediators. Although ambient cultural disharmony... View Details
Keywords: Carmen Nobel
- 21 Jul 2008
- Research & Ideas
Solving the Marketing Resources Allocation Puzzle
millions of customers are able to track how marketing investments affect individual customer's behavior. Every aspect of behavior is being monitored—a customer's first encounter with the firm, the initial and subsequent purchases, and the... View Details
Keywords: by Sean Silverthorne
- 2019
- Article
More Amazon Effects: Online Competition and Pricing Behaviors
By: Alberto Cavallo
I study how online competition, with its shrinking margins, algorithmic pricing technologies, and the transparency of the web, can change the pricing behavior of large retailers in the U.S. and affect aggregate inflation dynamics. In particular, I show that in the past... View Details
Keywords: Amazon; Online Prices; Inflation; Uniform Pricing; Price Stickiness; Monetary Economics; Economics; Macroeconomics; Inflation and Deflation; System Shocks; United States
Cavallo, Alberto. "More Amazon Effects: Online Competition and Pricing Behaviors." Jackson Hole Economic Symposium Conference Proceedings (Federal Reserve Bank of Kansas City) (2019).