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- All HBS Web (1,010)
- Faculty Publications (326)
- 09 Sep 2011
- Working Paper Summaries
Quantity vs. Quality: Exclusion by Platforms with Network Effects
- July 2003 (Revised March 2004)
- Case
XM Satellite Radio (A)
By: David B. Godes and Elie Ofek
XM Satellite Radio is a radically new way to listen to radio. Management must develop a marketing strategy to launch the firm and the category. A crucial aspect of the strategy is to determine which of two business models the company will pursue. Should it focus... View Details
Keywords: Advertising; Business Model; Decision Choices and Conditions; Cost Management; Marketing Channels; Marketing Strategy; Problems and Challenges; Partners and Partnerships; Sales; Competitive Strategy; Communications Industry
Godes, David B., and Elie Ofek. "XM Satellite Radio (A)." Harvard Business School Case 504-009, July 2003. (Revised March 2004.)
- Research Summary
Current Research
I am interested in research on various topics in retail operations and supply chain management, including inventory management, product variety, distribution logistics, financial performance of retailers, and linking operational performance to... View Details
The Air War Versus The Ground Game: An Analysis of Multi-Channel Marketing in U.S. Presidential Elections
This study jointly examines the effects of television advertising and field operations in U.S. presidential elections, with the former referred to as the “air war” and the latter as the “ground game.” Specifically, the study focuses on how different campaign... View Details
- October 2019 (Revised January 2020)
- Supplement
Dulcie Madden (C)—A Final Chance?
By: Shikhar Ghosh and Shweta Bagai
This is part of a three-case series that follows Dulcie Madden's journey as a founder over five years. Case (A) is about managing growth and cash flow; Case (B) is about the exit decision and conditions on a sale; Case (C) shows Madden dealing with adversity and the... View Details
Keywords: Entrepreneurship; Growth Management; Cash Flow; Success; Failure; Acquisition; Business Model; Technology
Ghosh, Shikhar, and Shweta Bagai. "Dulcie Madden (C)—A Final Chance?" Harvard Business School Supplement 820-054, October 2019. (Revised January 2020.)
- 2011
- Working Paper
Price Competition under Multinomial Logit Demand Functions with Random Coefficients
In this paper, we postulate a general class of price competition models with Mixed Multinomial Logit demand functions under affine cost functions. We first characterize the equilibrium behavior of this class of models in the case where each product in the market is... View Details
Keywords: Customers; Income Characteristics; Price; Product Marketing; Mathematical Methods; Competition; Segmentation
Allon, Gad, Awi Federgruen, and Margaret Pierson. "Price Competition under Multinomial Logit Demand Functions with Random Coefficients." Harvard Business School Working Paper, No. 12-030, October 2011.
- 2008
- Working Paper
Collaborative Architectures for Innovation
By: Gary P. Pisano and Roberto Verganti
Collaborative innovation has become a hot topic in innovation today. Scholars, consultants, and the business press all urge companies seeking to boost innovative performance to become more "collaborative." Too often, however, companies fail to distinguish among the... View Details
- 07 Jul 2008
- Research & Ideas
Innovation Corrupted: How Managers Can Avoid Another Enron
the rewards were great. This initial success prompted Enron to extrapolate its business model to other markets. In 1994, Enron officials started trading wholesale electricity after Congress deregulated the industry; Enron analysts... View Details
- Article
Reputation When Threats and Transfers Are Available
By: Ernesto Dal Bo, Pedro Dal Bo and Rafael Di Tella
We present a model where a long-run player is allowed to use both money transfers and threats to influence the decisions of a sequence of short-run players. We show that threats might be used credibly (even in arbitrarily short repeated games) by a long-lived player... View Details
Keywords: Crime and Corruption; Decision Choices and Conditions; Game Theory; Mathematical Methods; Interests; Power and Influence; Reputation
Dal Bo, Ernesto, Pedro Dal Bo, and Rafael Di Tella. "Reputation When Threats and Transfers Are Available." Journal of Economics & Management Strategy 16, no. 3 (Fall 2007).
- September 2009 (Revised February 2011)
- Case
Eden McCallum: A Network-Based Consulting Firm (A)
By: Heidi K. Gardner and Robert G. Eccles
Eden McCallum pioneered the network-based ("virtual") consulting firm model in the U.K. Contracting freelance consultants on a per-project basis keeps overheads lean so that Eden McCallum's fees are a fraction of the big firms' rates. Their flexible, low-cost model has... View Details
Keywords: Business Model; Decision Choices and Conditions; Financial Crisis; Growth and Development Strategy; Expansion; Consulting Industry; United Kingdom
Gardner, Heidi K., and Robert G. Eccles. "Eden McCallum: A Network-Based Consulting Firm (A)." Harvard Business School Case 410-056, September 2009. (Revised February 2011.)
- February 2018
- Article
Auctions versus Posted Prices in Online Markets
By: Liran Einav, Chiara Farronato, Jonathan Levin and Neel Sundaresan
Auctions were very popular in the early days of internet commerce, but today online sellers mostly use posted prices. We model the choice between auctions and posted prices as a trade-off between competitive price discovery and convenience. Evidence from eBay fits the... View Details
Einav, Liran, Chiara Farronato, Jonathan Levin, and Neel Sundaresan. "Auctions versus Posted Prices in Online Markets." Journal of Political Economy 126, no. 1 (February 2018): 178–215.
- 2010
- Working Paper
Trade Policy and Firm Boundaries
By: Laura Alfaro, Paola Conconi, Harald Fadinger and Andrew F. Newman
We study how trade policy affects firms' ownership structures. We embed an incomplete contracts model of vertical integration choices into a standard perfectly-competitive international trade framework. Integration decisions are driven by a trade-off between the... View Details
- January 2008
- Background Note
Collateralized Debt Obligations (CDOs)
By: Joshua Coval and Erik Stafford
This lesson integrated Merton's (1974) contingent claims model of debt and equity claims with the CAPM, which allows us to examine the risks and pricing of credit portfolios and the derivative claims issued against them. In particular, this model is used to make... View Details
Keywords: Decision Choices and Conditions; Borrowing and Debt; Credit Derivatives and Swaps; Investment Portfolio; Risk Management
Coval, Joshua, and Erik Stafford. "Collateralized Debt Obligations (CDOs)." Harvard Business School Background Note 208-113, January 2008.
- July 2009 (Revised August 2011)
- Case
What Happened at Citigroup? (A)
By: Clayton S. Rose and Aldo Sesia
What went wrong at Citigroup? In 1998, the Travelers Group and Citicorp merged to create Citigroup Inc., considered the first true global "financial supermarket" and a business model to be envied, feared, and emulated. By year-end 2006 the firm had a market... View Details
Keywords: Mergers and Acquisitions; Business Model; Decision Choices and Conditions; Globalized Firms and Management; Leadership; Risk Management; Failure; Financial Services Industry
Rose, Clayton S., and Aldo Sesia. "What Happened at Citigroup? (A)." Harvard Business School Case 310-004, July 2009. (Revised August 2011.)
- 2020
- Article
Mutual Funds: Skill and Performance
By: Jonathan B. Berk, Jules van Binsbergen and Max Miller
The authors summarize the recent literature on mutual fund manager skill and performance. They discuss the latest contributions in the field and reinterpret them through the lens of the rational expectations framework (efficient market hypothesis). They further discuss... View Details
Keywords: Investment Return; Investment Portfolio; Financial Management; Performance Evaluation; Measurement and Metrics
Berk, Jonathan B., Jules van Binsbergen, and Max Miller. "Mutual Funds: Skill and Performance." Journal of Portfolio Management 46, no. 5 (2020): 17–31.
- January 2015
- Article
Marketplace or Reseller?
By: Andrei Hagiu and Julian Wright
Intermediaries can choose between functioning as a marketplace (on which suppliers sell their products directly to buyers) or as a reseller (purchasing products from suppliers and selling them to buyers). We model this as a decision between whether control rights over... View Details
Hagiu, Andrei, and Julian Wright. "Marketplace or Reseller?" Management Science 61, no. 1 (January 2015): 184–203.
- January 2025 (Revised April 2025)
- Case
Less Is More: Will Aldi's Expansion Plans Pay Off in a Crowded U.S. Grocery Market?
By: David Collis and Haisley Wert
In 2024, the discount grocery retailer Aldi announced bold U.S. expansion plans. Within five years, the German company would increase its store count by 30% to reach 3,200+ stores across the United States and approach becoming the fifth largest grocery retailer in the... View Details
Keywords: Scope; Grocery; Corporate Strategy; Expansion; Business Model; Competitive Strategy; Retail Industry; United States
Collis, David, and Haisley Wert. "Less Is More: Will Aldi's Expansion Plans Pay Off in a Crowded U.S. Grocery Market?" Harvard Business School Case 725-416, January 2025. (Revised April 2025.)
- August 2015
- Article
Poultry in Motion: A Study of International Trade Finance Practices
By: Pol Antràs and C. Fritz Foley
This paper analyzes the financing terms that support international trade and sheds light on how these terms shape the impact of economic shocks on trade. Analysis of transaction-level data from a U.S.-based exporter of frozen and refrigerated food products, primarily... View Details
Antràs, Pol, and C. Fritz Foley. "Poultry in Motion: A Study of International Trade Finance Practices." Journal of Political Economy 123, no. 4 (August 2015): 853–901. (Revised May 2014. Online Appendix.)
- May 2008
- Article
Regulation and Bonding: The Sarbanes-Oxley Act and the Flow of International Listings
By: Suraj Srinivasan and Joseph Piotroski
In this paper, we examine the economic impact of the Sarbanes-Oxley Act (SOX) by analyzing foreign listing behavior onto U.S. and U.K. stock exchanges before and after the enactment of the Act in 2002. Using a sample of all listing events onto U.S. and U.K. exchanges... View Details
Keywords: Decision Choices and Conditions; Stocks; Government Legislation; Market Transactions; Motivation and Incentives; United Kingdom; United States
Srinivasan, Suraj, and Joseph Piotroski. "Regulation and Bonding: The Sarbanes-Oxley Act and the Flow of International Listings." Journal of Accounting Research 46, no. 2 (May 2008).
- August 2017 (Revised August 2018)
- Case
Busbud: Building a Data Company
By: Srikant M. Datar, Alistair Croll and Caitlin N. Bowler
The case features the work of LP Maurice (HBS '08) as he decides to take on the fragmented bus travel industry and launch an online business that aggregates and shares bus schedules for routes around the world. His first challenge: finding that the data he needs is... View Details
Keywords: Data Science; Analytics and Data Science; Business Startups; Knowledge Acquisition; Customers; Measurement and Metrics; Transportation Industry
Datar, Srikant M., Alistair Croll, and Caitlin N. Bowler. "Busbud: Building a Data Company." Harvard Business School Case 118-011, August 2017. (Revised August 2018.)