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March 2024 (Revised March 2025)
Background Note

Physical Climate Risk

By: Michael W. Toffel, Spencer Glendon and Alison Smart

This note describes how managers can identify and manage their company’s physical climate risks, which can increase their operations and supply chain costs and risks, and affect demand for their goods and services. Can be paired with the video “Preparing business... View Details

Keywords: Resilience; Maps; Climate Risk; Climate Impact; Modeling And Analysis; Climate Change; Risk Management; Demand and Consumers; Supply Chain; Organizational Change and Adaptation; Disruption

October 2023
Article

Improving Regulatory Effectiveness Through Better Targeting: Evidence from OSHA

By: Matthew S. Johnson, David I. Levine and Michael W. Toffel

We study how a regulator can best target inspections. Our case study is a U.S. Occupational Safety and Health Administration (OSHA) program that randomly allocated some inspections. On average, each inspection averted 2.4 serious injuries (9%) over the next five years.... View Details

Keywords: Safety Regulations; Regulations; Regulatory Enforcement; Machine Learning Models; Safety; Operations; Service Operations; Production; Forecasting and Prediction; Decisions; United States

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2012
Case

Zhejiang Semir Garment Co., Ltd.

By: F. Warren McFarlan, Jie Jiao and Yuren Fang

With the rapid growth of China's economy and China's increasing integration into the global economy in the past two decades, China's leisure clothing and garment enterprises achieved a rapid rise and became an important competitive force confronting the foreign brands... View Details

Keywords: Business Model Innovation; Competitive Strategy; Management Controls; China; China

November, 2022
Article

Role of Context in Knowledge Flows: Host Country versus Headquarters as Sources of MNC Subsidiary Knowledge Inheritance

By: Mike Horia Teodorescu, Prithwiraj Choudhury and Tarun Khanna

We respond to calls in the strategy and international business literature for elucidating how multinational subsidiaries develop contextual intelligence in host countries and how they use the local context as a source of valuable opportunities for learning. Applying... View Details

Keywords: MNCs; Knowledge Flows; Innovation; Gravity Model; Absorptive Capacity; Multinational Firms and Management; Business Subsidiaries; Knowledge Management; Business Headquarters; Innovation and Invention

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Article

Aztec Castles and the dP3 Quiver

By: Megan Leoni, Gregg Musiker, Seth Neel and Paxton Turner

Bipartite, periodic, planar graphs known as brane tilings can be associated to a large class of quivers. This paper will explore new algebraic properties of the well-studied del Pezzo 3 (dP3) quiver and geometric properties of its corresponding brane tiling. In... View Details

Keywords: Brane Tiling; Del Pezzo 3 Lattice; Dimer Model; Mathematical Methods

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June 2017 (Revised May 2018)
Supplement

Hilti Fleet Management Video Supplements

By: Ramon Casadesus-Masanell, Oliver Gassmann and Roman Sauer

This case explores the introduction of fleet management in the construction industry by the premium power tools manufacturer Hilti in 2000. Following its customers’ needs, Hilti moved from selling power tools to leasing them as a service. The introduction of the new... View Details

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

2025
Working Paper

Dynamic Personalization with Multiple Customer Signals: Multi-Response State Representation in Reinforcement Learning

By: Liangzong Ma, Ta-Wei Huang, Eva Ascarza and Ayelet Israeli

Reinforcement learning (RL) offers potential for optimizing sequences of customer interactions by modeling the relationships between customer states, company actions, and long-term value. However, its practical implementation often faces significant challenges.... View Details

Keywords: Dynamic Policy; Deep Reinforcement Learning; Representation Learning; Dynamic Difficulty Adjustment; Latent Variable Models; Customer Relationship Management; Customer Value and Value Chain; Foreign Direct Investment; Analytics and Data Science

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

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

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

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

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

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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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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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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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

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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