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- All HBS Web
(646)
- People (4)
- News (123)
- Research (278)
- Events (3)
- Multimedia (3)
- Faculty Publications (163)
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- January 2003 (Revised May 2005)
- Case
Zipcar: Refining the Business Model
By: Myra M. Hart, Michael J. Roberts and Julia Stevens
Zipcar is a start-up organized around the idea of "sharing" car usage via a membership organization. This case describes several iterations of the Zipcar business model and financial plan. These iterations include a very early version and a version developed just prior... View Details
Keywords: Service Operations; Renting or Rental; Business Model; Business Plan; Entrepreneurship; Economic Growth; Management Skills; Transportation; Business Startups; Financial Strategy; Corporate Finance; Growth and Development Strategy; Transportation Industry; Service Industry
Hart, Myra M., Michael J. Roberts, and Julia Stevens. "Zipcar: Refining the Business Model." Harvard Business School Case 803-096, January 2003. (Revised May 2005.)
- September 2007 (Revised November 2008)
- Case
Sinopec: Refining its Strategy
By: Richard H.K. Vietor and Julia Galef
China's oil industry, with majority ownership vested in the government, had engaged in an "equity oil" strategy for the past few years-acquiring equity interests in oil producing nations including Sudan, Angola, and Iran. Outside critics, however, suggested that the... View Details
Keywords: Non-Renewable Energy; Equity; Foreign Direct Investment; Growth and Development Strategy; Demand and Consumers; State Ownership; Energy Industry; China
Vietor, Richard H.K., and Julia Galef. "Sinopec: Refining its Strategy." Harvard Business School Case 708-018, September 2007. (Revised November 2008.)
- June 2017
- Teaching Note
Qalaa Holdings and the Egyptian Refining Company
By: Victoria Ivashina and Jeffrey Boyar
Teaching Note for HBS No. 217-011 View Details
- September 2016 (Revised March 2018)
- Case
Qalaa Holdings and the Egyptian Refining Company
By: Victoria Ivashina and Marc Homsy
This case follows Qalaa Holdings, a successful Egypt-based private equity firm, and gives insight into the types of investments it pursued, its growth over time, and the limited partner base it had at hand. It also allows students to consider and debate whether the... View Details
Keywords: Africa; Structuring And Financing Large Projects; Private Equity; Infrastructure; Project Finance; Emerging Markets; Financial Services Industry; Egypt; Africa
Ivashina, Victoria, and Marc Homsy. "Qalaa Holdings and the Egyptian Refining Company." Harvard Business School Case 217-011, September 2016. (Revised March 2018.)
- Other Article
Should You Refinance Your Mortgage with Your Current Lender?
By: David Hao Zhang
Zhang, David Hao. "Should You Refinance Your Mortgage with Your Current Lender?" MortgageWaldo.com (2018).
- September 2003 (Revised February 2010)
- Teaching Note
Zipcar: Refining the Business Model (TN)
Teaching Note for (9-803-096), (9-806-717), and (9-806-718). View Details
- July 1987
- Case
Sun Refining and Marketing Co. (B)
By: D. Quinn Mills and G Bruce Friesen
Mills, D. Quinn, and G Bruce Friesen. "Sun Refining and Marketing Co. (B)." Harvard Business School Case 488-005, July 1987.
- July 1987
- Case
Sun Refining and Marketing Co. (A)
By: D. Quinn Mills and G Bruce Friesen
Keywords: Energy Industry
Mills, D. Quinn, and G Bruce Friesen. "Sun Refining and Marketing Co. (A)." Harvard Business School Case 488-004, July 1987.
- November 1989
- Case
CPC International: The Shift from Corn Refining to Consumer Goods
By: Ray A. Goldberg
Keywords: Marketing
Goldberg, Ray A. "CPC International: The Shift from Corn Refining to Consumer Goods." Harvard Business School Case 590-064, November 1989.
- 1990
- Chapter
Refinement of Nash Equilibrium: The Main Ideas
By: E. Kohlberg
Keywords: Mathematical Methods
Kohlberg, E. "Refinement of Nash Equilibrium: The Main Ideas." In Game Theory and Applications, edited by T. Ichiishi, A. Neyman, and Y. Tauman. San Diego: Academic Press, 1990.
- 11 Aug 2014
- Working Paper Summaries
Decision Making Under Information Asymmetry: Experimental Evidence on Belief Refinements
Keywords: by William Schmidt & Ryan W. Buell
- Article
Refined Configuration Results for Extremal Type II Lattices of Ranks 40 and 80
By: Noam D. Elkies and Scott Duke Kominers
We show that, if L is an extremal Type II lattice of rank 40 or 80, then L is generated by its vectors of norm min(L)+2. This sharpens earlier results of Ozeki, and the second author and Abel, which showed that such lattices L are generated by their vectors of norms... View Details
Keywords: Mathematical Methods
Elkies, Noam D., and Scott Duke Kominers. "Refined Configuration Results for Extremal Type II Lattices of Ranks 40 and 80." Proceedings of the American Mathematical Society 138, no. 1 (January 2010): 105–108.
- Article
Hinged Dissections Exist
By: Timothy G. Abbott, Zachary Abel, David Charlton, Erik D. Demaine, Martin L. Demaine and Scott Duke Kominers
We prove that any finite collection of polygons of equal area has a common hinged dissection. That is, for any such collection of polygons there exists a chain of polygons hinged at vertices that can be folded in the plane continuously without self-intersection to form... View Details
Abbott, Timothy G., Zachary Abel, David Charlton, Erik D. Demaine, Martin L. Demaine, and Scott Duke Kominers. "Hinged Dissections Exist." Discrete & Computational Geometry 47, no. 1 (January 2012): 150–186.
- June 2013 (Revised June 2014)
- Case
Valero Energy Corporation and Tight Oil
By: Richard H.K. Vietor, Eric Adamson, Aaron Byrd, Ned Chiverton, Mariko Meier and Rob Rain
Valero Energy, an incredibly successful US refiner, needs to make some decisions about tight oil. As production of light tight oil increases—from Eagle Ford, Bakken and elsewhere—Valero considers whether to add topping capacity to handle it, on top of its recent... View Details
Keywords: Petroleum; Oil ＆ Gas; Energy; Environment; Refining; Globalization; Tight Oil; Strategy; Natural Environment; Demand and Consumers; Supply and Industry; Policy; Energy Sources; Energy Industry; United States
Vietor, Richard H.K., Eric Adamson, Aaron Byrd, Ned Chiverton, Mariko Meier, and Rob Rain. "Valero Energy Corporation and Tight Oil." Harvard Business School Case 713-083, June 2013. (Revised June 2014.)
- August 2021 (Revised March 2022)
- Case
Camera IQ and the Metaverse: Building Augmented Reality Brand Experiences
By: Jill Avery and Rayan Nahas
Camera IQ, a camera marketing software company that empowered brands to create and launch augmented reality experiences (AREs) across social platforms, had just raised an additional $5 million to fund further product development and expand its marketing and sales... View Details
Keywords: Brand Management; Virtual Reality; Augmented Reality; B2B; Technology Platform; Marketing; Marketing Communications; Marketing Strategy; Brands and Branding; Digital Marketing; Internet and the Web; Growth Management; Customer Relationship Management; Customer Value and Value Chain; Social Media; E-commerce; Applications and Software; Digital Platforms; Advertising Industry; United States
Avery, Jill, and Rayan Nahas. "Camera IQ and the Metaverse: Building Augmented Reality Brand Experiences." Harvard Business School Case 522-002, August 2021. (Revised March 2022.)
- February 2025
- Supplement
Intenseye: Powering Workplace Health and Safety with AI (B)
By: Michael W. Toffel, Shane Greenstein and Sadika El Hariri
Intenseye used its $25 million series A funds to refine and expand its digital safety platform while refining its target markets and ideal customer profile. As the company implemented new approaches to create value for its clients, such as developing an AI-powered... View Details
Keywords: Safety Performance; Occupational Safety; Innovation; Safety; Operations; Health; AI and Machine Learning; Analytics and Data Science; Digital Transformation; Supply Chain Management; Performance Improvement; Entrepreneurship; Product Development; Customer Relationship Management; Value Creation; Venture Capital; Growth and Development Strategy; Information Technology Industry; United States; Europe; Middle East; Turkey
Toffel, Michael W., Shane Greenstein, and Sadika El Hariri. "Intenseye: Powering Workplace Health and Safety with AI (B)." Harvard Business School Supplement 625-025, February 2025.
- 15 Dec 2020
- Research & Ideas
The Unspoken Messages of COVID-19 Restrictions
restrictions—may need to refine their outreach to a pandemic-weary public, especially when it comes to high-risk activities, such as indoor dining. As vaccine hopes and holiday loneliness make distancing harder, consumers will need more... View Details
- October 2008 (Revised August 2010)
- Case
The Christmas Eve Closing
By: Peter Tufano
In 2002, two homeowners in Massachusetts are deciding whether to refinance their home less than two years after taking out an initial mortgage and a subsequent home equity line of credit. View Details
Tufano, Peter, and Andrea Ryan. "The Christmas Eve Closing." Harvard Business School Case 209-043, October 2008. (Revised August 2010.)
- October 1998 (Revised May 1999)
- Case
Kmart Corp.
Describes a situation in which a company (Kmart) refinances a portion of its debt. Used to illustrate how the asset and liability sides of the balance sheet are linked. View Details
Noe, Christopher F. "Kmart Corp." Harvard Business School Case 199-017, October 1998. (Revised May 1999.)
- January 2010 (Revised April 2010)
- Case
Credit Suisse Group: Managing Equity Research as a Business
By: Boris Groysberg, Paul M. Healy and Sarah Abbott
In 2003, in the midst of industry turmoil and company-specific challenges, Stefano Natella was named Global Head of Equity Research at Credit Suisse. Over a six-year period, Natella implemented and refined a new methodology for valuing equity research analysts, both... View Details
Keywords: Business Model; Change Management; Customer Satisfaction; Compensation and Benefits; Selection and Staffing; Balanced Scorecard; Organizational Change and Adaptation; Financial Services Industry
Groysberg, Boris, Paul M. Healy, and Sarah Abbott. "Credit Suisse Group: Managing Equity Research as a Business." Harvard Business School Case 410-073, January 2010. (Revised April 2010.)