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  • All HBS Web  (2,125)
    • People  (5)
    • News  (387)
    • Research  (1,356)
    • Events  (26)
  • Faculty Publications  (472)
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  • 2008
  • Working Paper

'Fair Marriages:' An Impossibility

By: Bettina-Elisabeth Klaus
For the classical marriage model (introduced in Gale and Shapley, 1962) efficiency and envy-freeness are not always compatible, i.e., fair matchings do not always exist. However, for many allocation of indivisible goods models (see Velez, 2008, and references therein),... View Details
Keywords: Marketplace Matching; Fairness
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Klaus, Bettina-Elisabeth. "'Fair Marriages:' An Impossibility." Harvard Business School Working Paper, No. 09-053, October 2008.
  • September 2013 (Revised June 2019)
  • Case

Marquee: Reinventing the Business of Nightlife

By: Anita Elberse, Ryan Barlow and Sheldon Wong
In January 2013, nightlife impresarios Jason Strauss and Noah Tepperberg are celebrating the re-opening of their famed New York City–based nightclub Marquee. While most clubs are over within their first one and a half years, Strauss and Tepperberg managed to keep... View Details
Keywords: Creative Industries; Nightlife; Service Management; Entertainment; Fashion; Celebrities; Event Marketing; Risk Management; Customer Relationship Management; Change Management; Supply Chain Management; Music Entertainment; Product Marketing; Entertainment and Recreation Industry; Las Vegas
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Elberse, Anita, Ryan Barlow, and Sheldon Wong. "Marquee: Reinventing the Business of Nightlife." Harvard Business School Case 514-028, September 2013. (Revised June 2019.)
  • 26 Jun 2017
  • Working Paper Summaries

Inventory Management for Mobile Money Agents in the Developing World

Keywords: by Karthik Balasubramanian, David F. Drake, and Douglas Fearing; Financial Services; Banking
  • August 2018
  • Article

Extrapolation and Bubbles

By: Nicholas Barberis, Robin Greenwood, Lawrence Jin and Andrei Shleifer
We present an extrapolative model of bubbles. In the model, many investors form their demand for a risky asset by weighing two signals: an average of the asset’s past price changes and the asset’s degree of overvaluation. The two signals are in conflict, and investors... View Details
Keywords: Bubble; Extrapolation; Volume; Price Bubble; Mathematical Methods
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Barberis, Nicholas, Robin Greenwood, Lawrence Jin, and Andrei Shleifer. "Extrapolation and Bubbles." Journal of Financial Economics 129, no. 2 (August 2018): 203–227.
  • 2023
  • Working Paper

Sending Signals: Strategic Displays of Warmth and Competence

By: Bushra S. Guenoun and Julian J. Zlatev
Using a combination of exploratory and confirmatory approaches, this research examines how people signal important information about themselves to others. We first train machine learning models to assess the use of warmth and competence impression management... View Details
Keywords: AI and Machine Learning; Personal Characteristics; Perception; Interpersonal Communication
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Guenoun, Bushra S., and Julian J. Zlatev. "Sending Signals: Strategic Displays of Warmth and Competence." Harvard Business School Working Paper, No. 23-051, February 2023.
  • 14 Feb 2023
  • HBS Case

Is Sweden Still 'Sweden'? A Liberal Utopia Grapples with an Identity Crisis

Swedish capitalism is like.” Could this lead to the end of the high-tax “Swedish model” that like-minded nations have come to admire? Harvard Business School Professor Debora Spar, who has analyzed Sweden extensively, says no, the Swedish View Details
Keywords: by Lane Lambert
  • 2024
  • Working Paper

The Value of Open Source Software

By: Manuel Hoffmann, Frank Nagle and Yanuo Zhou
The value of a non-pecuniary (free) product is inherently difficult to assess. A pervasive example is open source software (OSS), a global public good that plays a vital role in the economy and is foundational for most technology we use today. However, it is... View Details
Keywords: Valuation; Open Source Distribution; Applications and Software
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Hoffmann, Manuel, Frank Nagle, and Yanuo Zhou. "The Value of Open Source Software." Harvard Business School Working Paper, No. 24-038, January 2024.
  • 2009
  • Working Paper

Technology Innovation and Diffusion as Sources of Output and Asset Price Fluctuations

By: Diego A. Comin, Mark Gertler and Ana Maria Santacreu
We develop a model in which innovations in an economy's growth potential are an important driving force of the business cycle. The framework shares the emphasis of the recent "new shock" literature on revisions of beliefs about the future as a source of fluctuations,... View Details
Keywords: Business Cycles; Economic Growth; Asset Pricing; Technological Innovation; Mathematical Methods; System Shocks; Technology Adoption
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Comin, Diego A., Mark Gertler, and Ana Maria Santacreu. "Technology Innovation and Diffusion as Sources of Output and Asset Price Fluctuations." Harvard Business School Working Paper, No. 09-134, May 2009. (Revise and Resubmit at the Journal of Political Economy.)
  • Research Summary

Overview

Professor Begenau’s research agenda is directed at better understanding how financial markets work and how they affect the real economy. She uses quantitative analysis to build both prescriptive and descriptive models concerning financial risk in banking, and she also... View Details
  • March 2021 (Revised April 2021)
  • Case

Wirecard: The Downfall of a German Fintech Star

By: Jonas Heese, Charles C.Y. Wang and Tonia Labruyere
Wirecard was a German fintech company, member of the DAX30, that provided payment processing and related services. Wirecard had enjoyed large growth rates over the years and most investors and analysts were enthusiastic about the company's prospects. Wirecard's... View Details
Keywords: Accounting Fraud; Scandal; Accounting Audits; Accounting; Financial Reporting; Financial Institutions; Financial Markets; Corporate Governance; Governance Compliance; Corporate Accountability; Governance Controls; Financial Services Industry; Germany; Singapore; Dubai
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Heese, Jonas, Charles C.Y. Wang, and Tonia Labruyere. "Wirecard: The Downfall of a German Fintech Star." Harvard Business School Case 121-058, March 2021. (Revised April 2021.)
  • 2019
  • Working Paper

Large-Scale Demand Estimation with Search Data

By: Tomomichi Amano, Andrew Rhodes and Stephan Seiler
In many online markets, traditional methods of demand estimation are difficult to implement because assortments are very large and individual products are sold infrequently. At the same time, data on consumer search (i.e., browsing) behavior are often available and are... View Details
Keywords: High-dimensional Data; Demand Estimation; Consideration Sets; Consumer Search
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Amano, Tomomichi, Andrew Rhodes, and Stephan Seiler. "Large-Scale Demand Estimation with Search Data." Harvard Business School Working Paper, No. 19-022, September 2018. (Revised June 2019. Stanford University Research Paper, No. 18-36, 8-20 2018.)
  • January 2020
  • Article

Rethinking Measurement of Pay Disparity and Its Relation to Firm Performance

By: Ethan Rouen
I develop measures of firm-level pay disparity and examine their relation to firm performance. Using comprehensive compensation data for a large sample of firms, I find no statistically significant relation between the ratio of CEO-to-mean employee compensation and... View Details
Keywords: Pay Disparity; Pay Ratio; CEO Pay Ratio; Income Inequality; Executive Compensation; Employees; Wages; Equality and Inequality; Business Ventures; Performance
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Rouen, Ethan. "Rethinking Measurement of Pay Disparity and Its Relation to Firm Performance." Accounting Review 95, no. 1 (January 2020): 343–378.
  • January 2016 (Revised November 2018)
  • Case

Match Next: Next Generation Middle School?

By: John J-H Kim and Daniel Goldberg
This case is set in 2015 as a team at Match Education, a high performing charter middle school in Boston, explores new staffing and technology approaches in their quest to obtain what they term "jaw dropping" results. The team hopes to test and model for other schools... View Details
Keywords: General Management; K-12; Charter Schools; Public Schools; Edtech; Education; Information Technology; Management; Public Sector; Entrepreneurship; Education Industry; Boston
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Kim, John J-H, and Daniel Goldberg. "Match Next: Next Generation Middle School?" Harvard Business School Case 316-138, January 2016. (Revised November 2018.)
  • March 2002 (Revised July 2004)
  • Case

RWE and the Proposal for a German Electricity Regulator

In April 2001, Dietmar Kuhnt, CEO of the German energy giant RWE, had to make a decision that would affect his company's future. Profits in the electricity sector depended heavily on regulatory rules that influenced industry structure and pricing. RWE had emerged... View Details
Keywords: Energy Generation; Governance Compliance; Business Strategy; Energy Industry; Germany
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Dyck, Alexander, Jose Gomez-Ibanez, and Christoph Meier. "RWE and the Proposal for a German Electricity Regulator." Harvard Business School Case 702-053, March 2002. (Revised July 2004.)
  • Research Summary

Overcoming Large-N, Small-T Issues in Asset Pricing Tests

The large-N, small-T (i.e. large cross-section, short time series) nature of our asset data presents serious estimation problems for empirical asset pricing.  In response, the literature tests asset pricing models against 10-25 test assets or portfolios.  A... View Details
  • February 2008 (Revised November 2008)
  • Case

Radical Collaboration: IBM Microelectronics Joint Development Alliances

By: Willy Shih, Gary Pisano and Andrew A. King
IBM's "Radical Collaboration" model has been an innovative approach to meeting the challenges of the huge R&D and capital investments that are needed to stay competitive in the global semiconductor industry. This model has required a rethinking of what is proprietary,... View Details
Keywords: Cost Management; Investment; Collaborative Innovation and Invention; Problems and Challenges; Alliances; Networks; Partners and Partnerships; Research and Development; Competitive Advantage; Semiconductor Industry
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Shih, Willy, Gary Pisano, and Andrew A. King. "Radical Collaboration: IBM Microelectronics Joint Development Alliances." Harvard Business School Case 608-121, February 2008. (Revised November 2008.)
  • 13 Oct 2006
  • Working Paper Summaries

Pricing Liquidity: The Quantity Structure of Immediacy Prices

Keywords: by George C. Chacko, Jakub W. Jurek & Erik Stafford
  • October 2013 (Revised December 2013)
  • Case

Intuit QuickBooks: From Product to Platform

By: Andrei Hagiu and Elizabeth J. Altman
This case focuses on the challenges and opportunities faced by a successful incumbent organization attempting to transform a large portion of its business from a traditionally product-centric operating mode to a platform-based one that leverages network effects to... View Details
Keywords: Business Model; Organizational Change and Adaptation; Digital Platforms; Competitive Advantage; Network Effects; Consumer Products Industry
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Hagiu, Andrei, and Elizabeth J. Altman. "Intuit QuickBooks: From Product to Platform." Harvard Business School Case 714-433, October 2013. (Revised December 2013.)
  • July 2023 (Revised May 2024)
  • Case

Vytal: Packaging-as-a-Service

By: George Serafeim, Michael W. Toffel, Lena Duchene and Daniela Beyersdorfer
The Germany-based startup Vytal operated the largest digital-native reusable packaging-as-a-service network globally, having raised nearly €15 million, established a large network of restaurant partners, and prevented the use of millions of single-use take-out food... View Details
Keywords: Climate Risk; Digital; Platform Strategies; Data; Packaging; Sustainability; Start-up; Startup; Entrepreneur; Impact; Circular; Growth Strategy; Innovation; Environmental Sustainability; Innovation and Invention; Business Growth and Maturation; Growth and Development Strategy; Business Startups; Resource Allocation; Risk Management; Adoption; Strategy; Performance Productivity; Service Delivery; Service Operations; Supply Chain; Distribution; Entrepreneurship; Climate Change; Green Technology Industry; Service Industry; Retail Industry; Germany; Europe
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Serafeim, George, Michael W. Toffel, Lena Duchene, and Daniela Beyersdorfer. "Vytal: Packaging-as-a-Service." Harvard Business School Case 124-007, July 2023. (Revised May 2024.)
  • January 2025 (Revised April 2025)
  • Case

Duolingo: On a 'Streak'

By: Jeffrey F. Rayport, Nicole Tempest Keller and Nicole Luo
In December 2024, Severin Hacker, Co-Founder and Chief Technology Officer of Duolingo, reflected on the remarkable evolution of the language-learning app he helped launch in 2011. As the #1 most downloaded education app in the world, Duolingo had over 100 million... View Details
Keywords: Learning; AI and Machine Learning; Growth and Development Strategy; Motivation and Incentives; Diversification; Business Model; Market Entry and Exit; Technology Industry; Education Industry; United States
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Rayport, Jeffrey F., Nicole Tempest Keller, and Nicole Luo. "Duolingo: On a 'Streak'." Harvard Business School Case 825-097, January 2025. (Revised April 2025.)
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