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- All HBS Web (1,037)
- Faculty Publications (329)
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- 2021
- Working Paper
Impact Investing: A Theory of Financing Social Enterprises
By: Benjamin N. Roth
I present a model of financing social enterprises to delineate the role of impact investors relative to “pure” philanthropists. I characterize the optimal scale and structure of a social enterprise when financed by grants, and when financed by investments. Impact... View Details
Roth, Benjamin N. "Impact Investing: A Theory of Financing Social Enterprises." Harvard Business School Working Paper, No. 20-078, February 2020. (Revised June 2021.)
- 2020
- Working Paper
Prioritarianism and Optimal Taxation
By: Matti Tuomala and Matthew C. Weinzierl
Prioritarianism has been at the center of the formal approach to optimal tax theory since its modern starting point in Mirrlees (1971), but most theorists’ use of it is motivated by tractability rather than explicit normative reasoning. We characterize analytically and... View Details
Keywords: Prioritarianism; Optimal Taxation; Utilitarianism; Redistribution; Inverse-optimum; Taxation; Theory
Tuomala, Matti, and Matthew C. Weinzierl. "Prioritarianism and Optimal Taxation." Harvard Business School Working Paper, December 2020.
- February 2015 (Revised September 2016)
- Teaching Note
Making stickK Stick: The Business of Behavioral Economics
By: Leslie K. John and Michael Norton
Email mking@hbs.edu for a courtesy copy.
This Teaching Note explains the theory of the case and teaching plan for the case: Making sticK Stick: The Business of Behavioral Economics (514019). The case focuses on a... View Details
This Teaching Note explains the theory of the case and teaching plan for the case: Making sticK Stick: The Business of Behavioral Economics (514019). The case focuses on a... View Details
Keywords: Behavioral Economics; Behavior Change; B2B Vs. B2C; Human Resource Management; Marketing Of Innovations; Health ＆ Wellness; Weight Loss; Charitable Giving; Marketing; Consumer Behavior; Entrepreneurship; Internet and the Web; Health; Business Model; Sales; Human Resources; Health Industry; United States
John, Leslie K., and Michael Norton. "Making stickK Stick: The Business of Behavioral Economics." Harvard Business School Teaching Note 515-088, February 2015. (Revised September 2016.) (Email mking@hbs.edu for a courtesy copy.)
- June 2023 (Revised February 2024)
- Case
Betting on Green Steel
By: George Serafeim and Sofoklis Melissovas
'Betting on Green Steel' traces the innovative journey embarked upon by a group of MBA students who have set out to conceive a novel steelmaker that pioneers the production of green steel. The ensemble is confronted with a series of critical choices that will shape the... View Details
Keywords: Decarbonization; Sustainability Management; Technology; Industrialization; Climate Risk; Energy; Entrepreneurship; Environmental Sustainability; Technology Adoption; Climate Change; Innovation and Invention; Business Strategy; Family Business; Steel Industry; Middle East; India
Serafeim, George, and Sofoklis Melissovas. "Betting on Green Steel." Harvard Business School Case 123-101, June 2023. (Revised February 2024.)
- June 2014 (Revised April 2015)
- Case
OrthoChoice: Bundled Payments in the County of Stockholm (A)
By: Michael E. Porter, Clifford M. Marks and Zachary C. Landman
It was the waiting that drew the attention of the Stockholm County Council. In 2008, patients seeking a hip or knee replacement in Stockholm County faced wait times of up to two years of sometimes debilitating pain, intermittent missed work and income, and the trials... View Details
Keywords: Bundled Payment; Health Care Quality; Health Care; Sweden; Hip Replacement; Knee Replacement; Orthopedics; Health Care and Treatment; Health Disorders; Health; Health Industry; Sweden
Porter, Michael E., Clifford M. Marks, and Zachary C. Landman. "OrthoChoice: Bundled Payments in the County of Stockholm (A)." Harvard Business School Case 714-514, June 2014. (Revised April 2015.)
- 2023
- Working Paper
Senior Team Emotional Dynamics and Strategic Decision Making at a Platform Transition
By: Timo O. Vuori and Michael L. Tushman
Based on an inductive case study, we develop an emotional-temporal process model of an incumbent’s
strategic decision making at a platform transition. We describe the senior team’s emotional response to
this transition and the impact of these emotions on their... View Details
Vuori, Timo O., and Michael L. Tushman. "Senior Team Emotional Dynamics and Strategic Decision Making at a Platform Transition." Harvard Business School Working Paper, No. 23-054, March 2023.
- 20 Nov 2012
- First Look
First Look: November 20
quantitative insight on the link between a firm's business model choices and their ultimate profit consequences. We apply the method to Walmart. Using evidence from annual reports, research papers, case... View Details
Keywords: Sean Silverthorne
- 24 Aug 2012
- Working Paper Summaries
Equalizing Outcomes vs. Equalizing Opportunities: Optimal Taxation when Children’s Abilities Depend on Parents’ Resources
Keywords: by Alexander Gelber & Matthew Weinzierl
- April 2017
- Case
Imprimis (A)
By: Ramon Casadesus-Masanell, Karen Elterman and Marc Appel
This case examines the strategic choices and evolving business model of Imprimis Pharmaceuticals from the perspective of CEO Mark Baum. The (A) case provides a brief history of the company and of the compounding business, outlining the challenges faced by Imprimis in... View Details
Keywords: Strategy; Healthcare; Drug Compounding; Pharmaceuticals; Compounding; Drug Development; Decision-making; Mark Baum; Imprimis; Small Business; Decisions; Cost vs Benefits; Business Strategy; Business Model; Decision Choices and Conditions; Pharmaceutical Industry; United States
Casadesus-Masanell, Ramon, Karen Elterman, and Marc Appel. "Imprimis (A)." Harvard Business School Case 717-426, April 2017.
- May 2025
- Teaching Note
Boutiqaat: Influencing Retail in MENA
By: Juan Alcacer and Noor Al Qadhi
Boutiqaat, a Kuwait-based e-commerce platform, scaled an influencer-driven beauty retail model across MENA and now faces critical strategic choices about offline expansion and globalization. Founded in 2015, Boutiqaat combined social commerce, localized logistics, and... View Details
- winter 1989
- Article
Split-Awards Procurement and Innovation
By: James J. Anton and Dennis A. Yao
In many procurement settings, it is possible for a buyer to split a production award between suppliers. In this article, we develop a model of split-award procurement auctions in which the split choice is endogenous. We characterize the set of equilibrium bids and... View Details
Keywords: Innovation and Invention; Auctions; Bids and Bidding; Cost; Supply Chain; Investment; Balance and Stability
Anton, James J., and Dennis A. Yao. "Split-Awards Procurement and Innovation." RAND Journal of Economics 20, no. 4 (winter 1989): 538–552. (Harvard users click here for full text.)
- 03 Jun 2010
- Working Paper Summaries
Platforms and Limits to Network Effects
- 2021
- Article
Fair Algorithms for Infinite and Contextual Bandits
By: Matthew Joseph, Michael J Kearns, Jamie Morgenstern, Seth Neel and Aaron Leon Roth
We study fairness in linear bandit problems. Starting from the notion of meritocratic fairness introduced in Joseph et al. [2016], we carry out a more refined analysis of a more general problem, achieving better performance guarantees with fewer modelling assumptions... View Details
Joseph, Matthew, Michael J Kearns, Jamie Morgenstern, Seth Neel, and Aaron Leon Roth. "Fair Algorithms for Infinite and Contextual Bandits." Proceedings of the AAAI/ACM Conference on Artificial Intelligence, Ethics, and Society 4th (2021).
- 23 Nov 2010
- Working Paper Summaries
Growth Through Heterogeneous Innovations
- 14 May 2009
- Working Paper Summaries
Quantity vs. Quality and Exclusion by Two-Sided Platforms
- November 2013 (Revised December 2013)
- Case
Endeavor: Miami Heats Up
By: William A. Sahlman, Ramana Nanda, David Lane and Lisa Mazzanti
Endeavor Global was a nonprofit that for 15 years had worked to nurture entrepreneurship in emerging markets by selecting local high-impact entrepreneurs for mentoring and aid in scaling up their businesses from committed local business leaders. In summer 2012,... View Details
Keywords: Social Enterprise; Entrepreneurs; Scaling; Emerging Market Entrepreneurship; Not For Profit; Entrepreneurial Finance; Mentoring; Business Networks; Hybrid Nonprofit Funding; Mission and Purpose; Nonprofit Organizations; Social Entrepreneurship; Emerging Markets; Problems and Challenges; Finance; Miami
Sahlman, William A., Ramana Nanda, David Lane, and Lisa Mazzanti. "Endeavor: Miami Heats Up." Harvard Business School Case 814-043, November 2013. (Revised December 2013.)
- Article
Recovering Investor Expectations from Demand for Index Funds
By: Mark Egan, Alexander J. MacKay and Hanbin Yang
We use a revealed-preference approach to estimate investor expectations of stock market returns. Using data on demand for index funds that follow the S&P 500, we develop and estimate a model of investor choice to flexibly recover the time-varying distribution of... View Details
Keywords: Stock Market Expectations; Demand Estimation; Exchange-traded Funds (ETFs); Demand and Consumers; Investment
Egan, Mark, Alexander J. MacKay, and Hanbin Yang. "Recovering Investor Expectations from Demand for Index Funds." Review of Economic Studies 89, no. 5 (October 2022): 2559–2599.
- 2021
- Working Paper
Recovering Investor Expectations from Demand for Index Funds
By: Mark Egan, Alexander J. MacKay and Hanbin Yang
We use a revealed-preference approach to estimate investor expectations of stock market returns. Using data on demand for index funds that follow the S&P 500, we develop and estimate a model of investor choice to flexibly recover the time-varying distribution of... View Details
Keywords: Stock Market Expectations; Demand Estimation; Exchange-traded Funds (ETFs); Demand and Consumers; Investment; United States
Egan, Mark, Alexander J. MacKay, and Hanbin Yang. "Recovering Investor Expectations from Demand for Index Funds." NBER Working Paper Series, No. 26608, January 2020. (Accepted at the Review of Economic Studies. Harvard Business School Working Paper, No. 20-122, May 2020. Direct download. Revised July 2021.)
- October 2009 (Revised April 2010)
- Supplement
Societe Generale (B): The Jerome Kerviel Affair
By: Francois Brochet
This case illustrates the tension/balance that firms with complex and risky business models must consider in designing their internal controls. It describes the environment in which a derivatives trader engaged in massive directional positions on major European stocks... View Details
Brochet, Francois. "Societe Generale (B): The Jerome Kerviel Affair." Harvard Business School Supplement 110-030, October 2009. (Revised April 2010.)
- May 2000
- Article
Maxmin Expected Utility over Savage Acts with a Set of Priors
By: Ramon Casadesus-Masanell, Peter Klibanoff and Emre Ozdenoren
This paper provides an axiomatic foundation for a maxmin expected utility over a set of priors (MMEU) decision rule in an environment where the elements of choice are Savage acts. This characterization complements the original axiomatizations of MMEU developed in a... View Details
Keywords: Uncertainty Aversion; Ambiguity; Expected Utility; Set Of Priors; Knightian Uncertainty; Decision Making; Game Theory; Risk and Uncertainty; Mathematical Methods
Casadesus-Masanell, Ramon, Peter Klibanoff, and Emre Ozdenoren. "Maxmin Expected Utility over Savage Acts with a Set of Priors." Journal of Economic Theory 92, no. 1 (May 2000): 35–65.