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- March–April 2023
- Article
Market Segmentation Trees
By: Ali Aouad, Adam Elmachtoub, Kris J. Ferreira and Ryan McNellis
Problem definition: We seek to provide an interpretable framework for segmenting users in a population for personalized decision making. Methodology/results: We propose a general methodology, market segmentation trees (MSTs), for learning market... View Details
- February 2023 (Revised March 2024)
- Supplement
Shanty Real Estate: Teaching Note Supplement
By: Michael Luca and Jesse M. Shapiro
Shanty is a simulation in which students inhabit the role of either a traditional home buyer or an iBuyer, both bidding on the same condo. The traditional home buyer has access to a “comp sheet” of similar properties that have recently sold, and has done a walkthrough.... View Details
- February 13, 2023
- Editorial
The Secret Tax on Women’s Time
By: Lauren C. Howe, Lindsay B. Howe and Ashley V. Whillans
When studies revealed the so-called pink tax, showing in 2015 that personal hygiene products “for her” cost 13% more than similar products for men, it caused outrage and action. The irony that women, despite generally having fewer financial resources than men, are... View Details
- February 2023 (Revised March 2025)
- Case
Graphic Packaging: Project Cowboy (A)
By: Benjamin C. Esty and E. Scott Mayfield
In July 2019, Graphic Packaging CEO Michael Doss was proposing a $600 million investment in a new machine to produce coated recycled board (CRB), a type of paper packaging used for consumer products (cups, cereal boxes, beverage boxes, etc.) that utilized recycled... View Details
- February 2023
- Supplement
Graphic Packaging: Project Cowboy (A) Courseware
By: Benjamin C. Esty and Scott Mayfield
In July 2019, Graphic Packaging CEO Michael Doss was proposing a $600 million investment in a new machine to produce coated recycled board (CRB), a type of paper packaging used for consumer products (cups, cereal boxes, beverage boxes, etc.) that utilized recycled... View Details
- February 2023
- Case
Germany, Europe, and Green Industrial Revolution
By: Gunnar Trumbull and Jonathan Schlefer
In 2023, Germany was racing to master yet another industrial revolution: this time in green technology. Could it transform its manufacturing and industry in time to sustain internationally competitiveness, especially with the United States and China; reach carbon... View Details
- 2023
- Book
Workplace Conditions
By: Jill Maben, Jane Ball and Amy C. Edmondson
This Element reviews the evidence for three workplace conditions that matter for improving quality and safety in healthcare: staffing; psychological safety, teamwork, and speaking up; and staff health and well-being at work. The authors propose that these are... View Details
- January 2023 (Revised December 2023)
- Case
OhmConnect: Energizing the Future
By: Jeffrey F. Rayport, Jennifer Fonstad and Nicole Tempest Keller
Founded in 2013, OhmConnect was a free consumer web app that alerted customers about peak hours of electricity demand, and paid them to lower their energy use at home during these periods. The company sold the aggregated reductions generated by thousands of households... View Details
Keywords: App Development; Renewable Energy; Electricity Usage; Regulations; VC; Technology; Customer Acquisition Cost (CAC); Scalability; Applications and Software; Growth and Development Strategy; Governing Rules, Regulations, and Reforms; Business Model; Venture Capital; Energy Industry; United States; California; Texas; Europe
- January 2023
- Teaching Note
Duolingo: Teaching Languages to the Masses
By: Youngme Moon
Teaching Note for HBS Case 323-016. At the time the case is written, Duolingo is the most popular language learning service in the world. The company has more than 40 million monthly active users, and the company’s total annual revenue has reached $250 million a year.... View Details
- January 2023 (Revised June 2023)
- Case
Replika: Embodying AI
By: Shikhar Ghosh, Shweta Bagai and Marilyn Morgan Westner
Replika was a virtual AI companion that provided a way for people to process their emotions, build connections in a safe environment, and get through periods of loneliness. The chatbot fulfilled a user's need for a friend, romantic partner, or purely an emotional... View Details
- January 2023
- Case
EKI Energy Services: One Billion Carbon Credits
By: George Serafeim
Within nine months from the time of its Initial Public Offering (IPO) in April of 2021, EKI Energy Services (EKI) shares had increased by more than 8,000%. Equally explosive was the growth of the company’s revenues and Earnings Before Interest, Taxes and Depreciation... View Details
- January 2023
- Case
Cleave Therapeutics: Taking a Risk on Oncology Drug Discovery
By: Regina Herzlinger and Brian Walker
What should a successful executive (HBS Baker Scholar) assess as her next move as the CEO of a firm with a promising and yet uncertain new drug? Amy Burroughs’ mandate to successfully commercialize Cleave Therapeutics’ drug for a cancer with no current successful... View Details
- January 2023 (Revised August 2023)
- Case
Nick Saban: Embracing 'The Process' of Sustaining Success
By: Ranjay Gulati and Eppa Rixey
Nick Saban, head coach of the University of Alabama football team from 2007-2022, fielded teams that won 183 of 208 games (88%), including a record-tying six national championships. Saban’s approach to coaching, known to many as “The Process,” and the consistent... View Details
Keywords: Purpose; Leadership And Managing People; Football; Recruiting; Talent Acquisition; Talent And Talent Management; Talent Development And Retention; Organization Change And Adaptation; Organizational Behavior; Sports; Leadership; Leadership Development; Organizational Culture; Organizational Change and Adaptation; Sports Industry; United States
- January–February 2023
- Article
Data-Driven COVID-19 Vaccine Development for Janssen
By: Dimitris Bertsimas, Michael Lingzhi Li, Xinggang Liu, Jennings Xu and Najat Khan
The COVID-19 pandemic has spurred extensive vaccine research worldwide. One crucial part of vaccine development is the phase III clinical trial that assesses the vaccine for safety and efficacy in the prevention of COVID-19. In this work, we enumerate the first... View Details
- January 2023
- Article
Inequality Regimes in Sub-Saharan Africa from Precolonial Times to the Present
By: Ewout Frankema, Michiel de Haas and Marlous van Waijenburg
While current levels of economic inequality in Sub-Saharan Africa receive ample attention from academics and policymakers, we know little about the long-run evolution of inequality in the region. Even the new and influential ‘global inequality literature’ that is... View Details
- January 2023
- Article
Social Networks, Ethnicity, and Entrepreneurship
By: William R. Kerr and Martin Mandorff
We study the relationship between ethnicity, occupational choice, and entrepreneurship. Immigrant groups in the United States cluster in specific business sectors. For example, Koreans are 34 times more concentrated in self-employment for dry cleaning than other... View Details
- 2 Mar 2023 - 4 Mar 2023
- Conference Presentation
Speedy Activists: Firm Response Time to Sociopolitical Events Influences Consumer Behavior
By: Maya Balakrishnan, Julian De Freitas and Alison Wood Brooks
- December 2022
- Case
Taylor Farms: Adding Value to Fresh Produce
By: José B. Alvarez, Forest L. Reinhardt, Jenyfeer Martinez Buitrago and Pedro Levindo
In October 2022, Bruce Taylor (HBS MBA, 1981), Chairman and CEO of Taylor Farms, the leading producer of salads and healthy fresh foods in the United States, wondered whether this was the right time for Taylor Farms to venture into the Controlled Environment... View Details
- December 2022 (Revised May 2023)
- Case
Iberdrola: Leading the Energy Revolution
By: Juan Alcácer and Emer Moloney
At the end of 2019, Ignacio Galán, the Chairman and CEO of the world's third largest utility, Iberdrola, reflected on his almost 20 years at the company. He managed a portfolio of three very different businesses, each with their own specific opportunities and... View Details
Keywords: Energy; Energy Generation; Energy Sources; Non-Renewable Energy; Renewable Energy; Engineering; Innovation and Management; Innovation Leadership; Innovation Strategy; Technological Innovation; Leadership; Growth and Development Strategy; Market Timing; Industry Growth; Mission and Purpose; Strategy; Energy Industry; Green Technology Industry; Utilities Industry; Transportation Industry; Auto Industry; Spain; United Kingdom; United States; Brazil; Mexico
- December 2022
- Article
Conflicting Interests and the Effect of Fiduciary Duty: Evidence from Variable Annuities
By: Mark Egan, Shan Ge and Johnny Tang
We examine the variable annuity market to study conflicts of interest and the effect of fiduciary duty in brokerage markets. Insurers typically pay brokers higher commissions for selling more expensive annuities. Our results indicate that sales are four times as... View Details