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February 2015 (Revised June 2016)
Case

AltSchool: School Reimagined

By: John J-H Kim, Kyla Wilkes and Christine S. An

Max Ventilla and his team launches in 2013 AltSchool, a new network of tech-savvy independent K-8 "micro-schools." AltSchool is born out of Ventilla's frustration with the education options available for his young daughter. During his search, Ventilla comes to the... View Details

Keywords: Education Technology; School Models; Product Development; Entrepreneurship; Talent Development And Retention; Social Impact Investment; Information Technology; Business Model; Education; Business Startups; Customization and Personalization; Growth and Development Strategy; Education Industry; United States

August 2021
Case

Mylestone: Can Multiple Pivots Preserve the Life of a Death Tech Startup?

By: Shikhar Ghosh and Marilyn Morgan Westner

Dave Balter and Jim Myers co-founded Mylestone, a death tech startup that applied technology to transform how grieving people memorialize the dead. The startup addressed a cultural problem and promised to solve a pressing need in the antiquated, multi-billion dollar... View Details

Keywords: Pivot; Startup; Business Model; Cryptocurrency; Ethical Decision Making; Emotions; Growth and Development Strategy; Ethics; Market Entry and Exit; Customer Relationship Management; Loss; Change Management; Relationships

July 2014 (Revised August 2015)
Case

Qihoo

Qihoo, one of the largest Internet companies in China today, was founded in 2005. The company started its business by offering a security software product, and quickly dominated the market in China after its unusual move of giving its product away for free in 2009.... View Details

Keywords: Platform Strategy; Business Model Innovation; Chinese Internet Market; Competitive Strategy; Information Technology; Digital Platforms; Internet and the Web; Information Technology Industry

April 2019
Case

Afterpay U.S.: The Omnichannel Dilemma

By: Antonio Moreno, Donald Ngwe and George Gonzalez

In 2018, Nick Molnar, the founder of the Australia-based online payment service Afterpay began its expansion to the U.S. market. The service had gained a loyal following in Australia by enabling customers to pay for online purchases through four interest-free... View Details

Web

The Spread and Adoption of Option Pricing Models - Option Pricing in Theory & Practice: The Nobel Prize Research of Robert C. Merton - Exhibits - Historical Collections

Introduction Prelude to the Option Pricing Model The Formula The Spread and Adoption of Option Pricing Models The Significance and Consequences of Financial Models Selected... View Details

2017
Working Paper

Optimal Tilts: Combining Persistent Characteristic Portfolios

By: Malcolm Baker, Ryan Taliaferro and Terry Burnham

We examine the optimal weighting of four tilts in US equity markets from 1968 through 2014. We define a “tilt” as a characteristic-based portfolio strategy that requires relatively low annual turnover. This is a continuum, with small size, a very persistent... View Details

Keywords: Risk Anomaly; Beta; Capital Asset Pricing Model; Factor Investing

2013
Working Paper

Where do the Most Active Customers Originate and How Can Firms Keep Them Engaged?

By: Clarence Lee, E. Ofek and Thomas Steenburgh

In this paper, we study how firms offering Web services can acquire and develop an active customer base. We focus on two basic questions. First, how does the method of customer acquisition affect the way customers use the service to meet their own needs and to interact... View Details

Keywords: Customer Engagement; Adoption Routes; Hidden Markov Models; Search; Word-of-Mouth; Digital Media; Customer Relationship Management; Internet and the Web; Mathematical Methods; Consumer Behavior; Entrepreneurship; Marketing Reference Programs; Web Services Industry

2025
Working Paper

Generative AI Use by Capital Market Information Intermediaries: Evidence from Seeking Alpha

By: Mark Bradshaw, Chenyang Ma, Benjamin Yost and Yuan Zou

We study the use of generative AI for firm-specific financial analysis on the Seeking Alpha platform. We find that, after the initial launch of ChatGPT in November 2022, the share of AI-generated articles rose sharply to 13.4% of all articles, then declined in late... View Details

Keywords: Generative Ai; Seeking Alpha; Equity Research; Large Language Models; Gpt; AI and Machine Learning; Information Publishing; Financial Markets

September 2023
Teaching Note

Apple’s iPhone Revolution: Pioneering the Circular Economy

By: George Serafeim

Teaching Note for HBS Case 123-089. The case describes the Trade-In system for iPhones that allow iPhones to be refurbished and reused or to be recycled. The case provides information for the students to analyze the financial attractiveness of the Trade-In system and... View Details

Keywords: Iphone; Smartphone; Technology; Business Model Innovation; Carbon Emissions; Recycling; Business Model; Product Design; Climate Change; Environmental Sustainability; Green Technology; Technology Industry

December 2017 (Revised May 2018)
Case

Amazon Buys Whole Foods

By: José B. Alvarez, David Lane and Joni Coughlin

The June 2017 news that e-commerce giant Amazon was paying $13.7 billion for organic supermarket chain Whole Foods precipitated a broad sell-off in the shares of grocery retailers and suppliers. Behind the precipitous declines lay recognition that Amazon’s bold move... View Details

Keywords: Amazon; Whole Foods; Grocery; Grocery Delivery; Mergers ＆ Acquisitions; Business Models; Food Value Chain; Agribusiness; Mergers and Acquisitions; Operations; Competitive Strategy; E-commerce; Agriculture and Agribusiness Industry; Retail Industry; Web Services Industry; Food and Beverage Industry; United States

Article

Multi-Echelon Inventory Management Under Short-Term Take-or-Pay Contracts

By: Joel Goh and Evan L. Porteus

We extend the Clark–Scarf serial multi-echelon inventory model to include procuring production inputs under short-term take-or-pay contracts at one or more stages. In each period, each such stage has the option to order/process at two different cost rates; the cheaper... View Details

Keywords: Inventory Management; Multi-echelon Inventory Theory; Karush Lemma; Clark-Scarf Model; Convex Ordering Cost; Advance Commitments; Supply Chain

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Fourth Quarter 2017
Article

Optimal Tilts: Combining Persistent Characteristic Portfolios

By: Malcolm Baker, Ryan Taliaferro and Terry Burnham

We examine the optimal weighting of four tilts in U.S. equity markets from 1968 through 2014. We define a “tilt” as a characteristic-based portfolio strategy that requires relatively low annual turnover. This is a continuum, with small size (a very persistent... View Details

Keywords: Risk Anomaly; Beta; Capital Asset Pricing Model; Factor Investing

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July 2024
Article

Chatbots and Mental Health: Insights into the Safety of Generative AI

By: Julian De Freitas, Ahmet Kaan Uğuralp, Zeliha Uğuralp and Stefano Puntoni

Chatbots are now able to engage in sophisticated conversations with consumers. Due to the ‘black box’ nature of the algorithms, it is impossible to predict in advance how these conversations will unfold. Behavioral research provides little insight into potential safety... View Details

Keywords: Autonomy; Chatbots; New Technology; Brand Crises; Mental Health; Large Language Model; AI and Machine Learning; Behavior; Well-being; Technological Innovation; Ethics

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May 2017 (Revised November 2019)
Case

The Dubai International Film Festival

By: Rohit Deshpandé and Alpana Thapar

This case follows the conception and emergence of the Dubai International Film Festival (DIFF). In an already crowded and highly competitive industry, Abdulhamid Juma was attempting to define and establish a unique brand positioning for DIFF. Committed to its vision,... View Details

Keywords: Brand Positioning; Underdog Brand Building; Business Models; Non-profit; Managing Multiple Stakeholders; Film Entertainment; Brands and Branding; Business Model; Competitive Strategy; Decision Making; Growth and Development Strategy; Entertainment and Recreation Industry; Motion Pictures and Video Industry

November 2024
Article

On the Representativeness of Voter Turnout

By: Louis Kaplow and Scott Duke Kominers

Prominent theory research on voting analyzes a variety of models in which expected pivotality drives voters' turnout decisions and hence determines voting outcomes. It is recognized, however, that such work is at odds with Downs's paradox: in practice, many... View Details

Keywords: Voting Behavior; Voting Turnout; Paradox Of Voting; Pivotality; Elections; Model; Theory; Governance Transparency; Government; Democracy; Turnout; Voting; Governance; Government and Politics; Public Sector; Political Elections

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January 2017 (Revised October 2023)
Case

Classtivity: Payal's Pirouette

By: Jeffrey J. Bussgang and Olivia Hull

A few months after launching a new fitness technology product, the small staff of New York startup Classtivity gathers on a Saturday in April 2013 to take stock. With one successful pivot under its belt, Classtivity is finally generating revenue and enthusiasm among... View Details

September 2021 (Revised December 2021)
Case

STARZPLAY: Shooting for the Stars

By: Elie Ofek, Marco Bertini and Alpana Thapar

In mid-2021, Maaz Sheikh, cofounder and CEO of STARZPLAY, a Dubai-based subscription video on demand (SVOD) provider that catered to the Middle East and North Africa region, was wrestling with how to find the right balance between continued subscriber growth and... View Details

April 2020
Article

Designs for Estimating the Treatment Effect in Networks with Interference

By: Ravi Jagadeesan, Natesh S. Pillai and Alexander Volfovsky

In this paper, we introduce new, easily implementable designs for drawing causal inference from randomized experiments on networks with interference. Inspired by the idea of matching in observational studies, we introduce the notion of considering a treatment... View Details

Keywords: Experimental Design; Network Inference; Neyman Estimator; Symmetric Interference Model; Homophily

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March–April 2014
Article

The Low-Risk Anomaly: A Decomposition into Micro and Macro Effects

By: Malcolm Baker, Brendan Bradley and Ryan Taliaferro

Low beta stocks have offered a combination of low risk and high returns. We decompose the anomaly into micro and macro components. The micro component comes from the selection of low beta stocks. The macro component comes from the selection of low beta countries or... View Details

Keywords: Low Volatility; Beta; Portfolio Construction; Market Efficiency; Capital Asset Pricing Model; Asset Management

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Teaching Interest

Transforming Customer Experiences - Executive Education

By: Ryan W. Buell

In today's fast-growing service sector, a new set of frameworks are required to build a robust and competitive service business. Transforming Customer Experiences draws upon the latest research and insights to equip senior managers with a new toolkit for leading... View Details

Keywords: Service Delivery; Customer Satisfaction; Customer Loyalty; Quality; Employees; Service Models; Service Industry

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