Publications

April 2025
Teaching Note

Allbirds: Decarbonizing Fashion (A) and (B)

By: Michael W. Toffel, Ken Pucker and Stacy Straaberg

Teaching Note for HBS Case Nos. 622-024, 625-004, 625-005, and 625-702. The Allbirds: Decarbonizing Fashion (A) case introduces Allbirds as a footwear startup not only focused on simple design, comfort, and sustainable natural materials but on decarbonizing the wider... View Details

April 2025
Supplement

Allbirds: Decarbonizing Fashion PowerPoint Supplement

By: Michael W. Toffel, Ken Pucker and Stacy Straaberg

The Allbirds: Decarbonizing Fashion (A) case introduces Allbirds as a footwear startup not only focused on simple design, comfort, and sustainable natural materials but on decarbonizing the wider fashion industry. Background material highlights the growing... View Details

Keywords: Decarbonization; Climate Impact; Environmental Strategy; Innovation; Product Design; Supply Chain Management; Innovation Strategy; Innovation and Management; Product Development; Climate Change; Environmental Management; Environmental Sustainability; Apparel and Accessories Industry; Fashion Industry; United States; California

March 2025
Supplement

Fostering Community at Airbnb (B)

By: Jeffrey T. Polzer, Heather Whiteman and Sarah Mehta

This case provides updates to “Fostering Community at Airbnb (A),” case no. 425-045. View Details

Keywords: Change; Communication; Competency and Skills; Human Resources; Information; Information Technology; Accommodations Industry; Technology Industry; Travel Industry; United States; California

2025
Article

Humor as a Window into Generative AI Bias

By: Roger Samure, Julian De Freitas and Stefano Puntoni

A preregistered audit of 600 images by generative AI across 150 different prompts explores the link between humor and discrimination in consumer-facing AI solutions. When ChatGPT updates images to make them “funnier”, the prevalence of stereotyped groups changes. While... View Details

Keywords: AI and Machine Learning; Demographics; Prejudice and Bias

November 2024
Supplement

FedEx Cyberattack (B): Reflections and Lessons

By: Hise Gibson, Frank Nagle, Alicia Dadlani and Martha Hostetter

Set in 2024, this (B) case provides an update to the (A) case (no. 625-049) about a devastating cyberattack that destroyed thousands of computers and business systems at FedEx’s European division in 2017. It describes lessons learned and changes made in the wake of the... View Details

Keywords: Cybersecurity; Disruption; Crisis Management; Organizational Change and Adaptation; Europe

November 2024
Supplement

Clara Wu Tsai and Brooklyn Loan Innovation (B)

By: Archie Jones, Mathieu Davis, Mourya Mamidala and Max Hancock

This (B) case provides an update on “Clara Wu Tsai and Brooklyn Loan Innovation (A)” View Details

Keywords: Business Startups; Social Entrepreneurship; Venture Capital; Banks and Banking; United States; New York (city, NY)

2024
Working Paper

Advice and the Bayesian Entrepreneur

By: Susan Cohen and Rembrand Koning

Bayesian entrepreneurship starts from the premise that entrepreneurs’ beliefs guide their theorizing, experimentation, and choices (Agrawal et al., n.d.). Since each entrepreneur has unique beliefs based on their own set of past experiences, cognitive ability, and... View Details

Keywords: Entrepreneurship; Decision Choices and Conditions

November 2024
Article

Perceptions About Monetary Policy

By: Michael D. Bauer, Carolin Pflueger and Adi Sunderam

We estimate perceptions about the Federal Reserve’s monetary policy rule from panel data on professional forecasts of interest rates and macroeconomic conditions. The perceived dependence of the federal funds rate on economic conditions varies substantially over time,... View Details

Keywords: Monetary Policy; Policy; Interest Rates; Perception; Economy; Forecasting and Prediction

2025
Working Paper

Lessons from an App Update at Replika AI: Identity Discontinuity in Human-AI Relationships

By: Julian De Freitas, Noah Castelo, Ahmet Kaan Uğuralp and Zeliha Oğuz-Uğuralp

As consumers increasingly interact with AI applications specialized for social relationships, what is the nature and depth of these relationships among actual users, and can company actions influence these dynamics? We find that active users of the US-based AI... View Details

Keywords: AI and Machine Learning; Welfare; Loss; Well-being; Identity; Perception; Relationships

SSRN

2024
Working Paper

Priors, Experiments, Learning and Persuasion in (Bayesian) Entrepreneurial Finance

By: Ramana Nanda

At the heart of entrepreneurial finance lies a persuasion challenge: regardless of the strength of an entrepreneur’s belief in the potential of their idea, they typically need to convince investors to provide the financial capital required for its... View Details

Keywords: Entrepreneurial Finance; Business Startups; Communication Intention and Meaning; Prejudice and Bias

SSRN

September 2024
Supplement

Allbirds: Decarbonizing Fashion (B)

By: Michael W. Toffel, Kenneth P. Pucker and Stacy Straaberg

The Allbirds: Decarbonizing Fashion (B) case encourages students to assess Allbirds’ product development and go-to-market strategies now that Allbirds is a publicly listed company. The (B) case provides a 2024 update on Allbirds including its initial public offering,... View Details

2024
Working Paper

The New Digital Divide

By: Mayana Pereira, Shane Greenstein, Raffaella Sadun, Prasanna Tambe, Lucia Ronchi Darre, Tammy Glazer, Allen Kim, Rahul Dodhia and Juan Lavista Ferres

We build and analyze new metrics of digital usage that leverage telemetry data collected by Microsoft during operating system updates across forty million Windows devices in U.S. households. These measures of US household digital usage are much more comprehensive than... View Details

Keywords: Mathematical Methods; Measurement and Metrics; Geographic Location; Behavior; Technology Adoption; Demographics

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July 2024
Article

A (Dynamic) Investigation of Stereotypes, Belief-Updating, and Behavior

By: Katherine B. Coffman, Paola Ugalde Araya and Basit Zafar

Many decisions—such as what educational or career path to pursue—are dynamic in nature, with individuals receiving feedback at one point in time and making decisions later. Using a controlled experiment, with two sessions one week apart, we analyze the dynamic effects... View Details

Keywords: Feedback; Beliefs; Stereotypes; Self-assessment; Gender Gap; Gender; Equality and Inequality; Perception; Decision Choices and Conditions

2024
Working Paper

Navigating Software Vulnerabilities: Eighteen Years of Evidence from Medium and Large U.S. Organizations

By: Raviv Murciano-Goroff, Ran Zhuo and Shane Greenstein

How prevalent are severe software vulnerabilities, how fast do software users respond to the availability of secure versions, and what determines the variance in the installation distribution? Using the largest dataset ever assembled on user updates, tracking server... View Details

Keywords: Cybersecurity; Applications and Software; Technology Adoption; Consumer Behavior

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June 2024
Article

Inflation with COVID Consumption Baskets

By: Alberto Cavallo

The Covid-19 pandemic led to changes in expenditure patterns that introduced significant bias in the measurement of Consumer Price Index (CPI) inflation. Using publicly-available data on card transactions, I updated the official CPI weights and re-calculated inflation... View Details

Keywords: COVID; Consumer Expenditures; CPI; Inflation; Consumer Behavior; Inflation and Deflation; Health Pandemics

June 2024
Article

Stereotypes and Belief Updating

By: Katherine B. Coffman, Manuela Collis and Leena Kulkarni

We explore how feedback shapes, and perpetuates, gender gaps in self-assessments. Participants in our experiment take tests of their ability across different domains. We elicit their beliefs of their performance before and after feedback. We find that, even after the... View Details

Keywords: Beliefs; Stereotypes; Self-assessment; Performance Evaluation; Gender; Cognition and Thinking; Perception; Knowledge Sharing

June 2024
Article

Valuing the Societal Impact of Medicines and Other Health Technologies: A User Guide to Current Best Practices

By: Jason Shafrin, Jaehong Kim, Joshua T. Cohen, Louis P. Garrison, Dana A. Goldman, Jalpa A. Doshi, Joshua Krieger, Darius N. Lakdawalla, Peter J. Neumann, Charles E. Phelps, Melanie D. Whittington and Richard Willke

This study argues that value assessment conducted from a societal perspective should rely on the Generalized Cost-Effectiveness Analysis (GCEA) framework proposed herein. Recently developed value assessment inventories—such as the Second Panel on Cost-Effectiveness’s... View Details

Keywords: Health Care and Treatment; Valuation; Cost vs Benefits; Society

May 2024
Supplement

GameStop: Social Media Finds a Cheat Code (B)

By: Joseph Pacelli and Sarah Mehta

This case accompanies “GameStop: Social Media Finds a Cheat Code (A),” no. 124-005. It provides an update on pertinent events from 2021 to 2023. View Details

Keywords: Finance; Markets; Value; Financial Services Industry; Video Game Industry; United States

2024
Working Paper

Immigrant Entrepreneurship: New Estimates and a Research Agenda

By: Saheel Chodavadia, Sari Pekkala Kerr, William R. Kerr and Louis Maiden

Immigrants contribute disproportionately to entrepreneurship in many countries, accounting for a quarter of new employer businesses in the US. We review recent research on the measurement of immigrant entrepreneurship, the traits of immigrant founders, their economic... View Details

Keywords: Immigrant Employment; Immigration; Entrepreneurship; Demographics; Innovation and Invention