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2024
Chapter

The U.S. Secession Crisis as a Breakdown of Democracy

By: Dean Grodzins and David Moss

This chapter examines the U.S. secession crisis of 1860–1861 as a case of democratic breakdown. From December 1860 to early June 1861, eleven of the fifteen slaveholding states in the U.S. South declared secession from the Union. The trigger for the crisis was Abraham... View Details

Keywords: War; History; Political Elections; United States

January–February 2024
Article

Leaders Must React: A Framework for Responding to Unforeseen Events

By: Nitin Nohria

To be successful, CEOs must articulate a compelling vision, align people around it, and motivate them to execute it. But there’s one thing that can make or break them: how they respond in real time to unforeseen events.

On average, addressing unexpected... View Details

Keywords: Crisis Management; Management Skills; Leadership Style

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July 2023
Article

Takahashi-Alexander Revisited: Modeling Private Equity Portfolio Outcomes Using Historical Simulations

By: Dawson Beutler, Alex Billias, Sam Holt, Josh Lerner and TzuHwan Seet

In 2001, Dean Takahashi and Seth Alexander of the Yale University Investments Office developed a deterministic model for estimating future cash flows and valuations for the Yale endowment’s private equity portfolio. Their model, which is simple and intuitive, is still... View Details

Keywords: Forecasting and Prediction; Investment Portfolio; Analytics and Data Science

2023
Article

A Randomized Trial of Behavioral Nudges Delivered through Text Messages to Increase Influenza Vaccination among Patients with an Upcoming Primary Care Visit

By: Mitesh S. Patel, Katherine L. Milkman, Linnea Gandhi, Heather N. Graci, Dena Gromet, Hung Ho, Joseph S. Kay, Timothy W. Lee, Jake Rothschild, Modupe Akinola, John Beshears, Jonathan E. Bogard, Alison Buttenheim, Christopher Chabris, Gretchen B. Chapman, James J. Choi, Hengchen Dai, Craig R. Fox, Amir Goren, Matthew D. Hilchey, Jillian Hmurovic, Leslie John, Dean Karlan, Melanie Kim, David Laibson, Cait Lamberton, Brigitte C. Madrian, Michelle N. Meyer, Maria Modanu, Jimin Nam, Todd Rogers, Renante Rondina, Silvia Saccardo, Maheen Shermohammed, Dilip Soman, Jehan Sparks, Caleb Warren, Megan Weber, Ron Berman, Chalanda N. Evans, Seung Hyeong Lee, Christopher K. Snider, Eli Tsukayama, Christophe Van den Bulte, Kevin G. Volpp and Angela L. Duckworth

Purpose: To evaluate if nudges delivered by text message prior to an upcoming primary care visit can increase influenza vaccination rates.
Design: Randomized, controlled trial.
Setting: Two health systems in the Northeastern US between September 2020 and... View Details

Keywords: Vaccination; Health Care and Treatment; Interpersonal Communication; Communication Technology; Behavior; Health Industry

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Article

As the World Shifts, So Should Leaders

By: Nitin Nohria

Two decades ago, extensive research led Nohria, the former dean of Harvard Business School, to conclude that the hallmark of great leadership is the ability to adapt to the times. Today, he says, we're in a period of significant change, thanks to global events,... View Details

Keywords: Adaptability; Leadership; Organizational Change and Adaptation; Adaptation

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2024
Working Paper

Do Collusive Norms Maximize Profits? Evidence From a Vegetable Market Experiment in India

By: Abhijit Banerjee, Greg Fischer, Dean Karlan, Matt Lowe and Benjamin N. Roth

Social norms have been shown to facilitate anti-competitive behavior in decentralized markets. We demonstrate that these norms can also reduce aggregate profits. First, we present descriptive evidence of competition-suppressing norms in Kolkata vegetable markets.... View Details

Keywords: Collusion; Competition; Market Entry and Exit; Small Business; Microeconomics; Kolkata

2022
Working Paper

Social Protection and Social Distancing During the Pandemic: Mobile Money Transfers in Ghana

By: Dean Karlan, Matt Lowe, Robert Osei, Isaac Osei-Akoto, Benjamin N. Roth and Christopher Udry

We study the impact of mobile money transfers to a representative sample of low-income Ghanaians during the COVID-19 pandemic. The announcement of the upcoming transfers affects neither consumption, well-being, nor social distancing. Once disbursed,... View Details

Keywords: Social Distancing; Social Welfare; Economic Relief; Health Pandemics; Poverty

April 2022
Case

Melio: Modernizing Payments for Small Business

By: David S. Scharfstein, Dean Xu and Danielle Golan

March 2022
Case

Talent@Tencent

By: Tarun Khanna, Shu Lin and Nancy Hua Dai

On November 11, 2016, Xi Dan, Senior Vice President of Tencent, and Ma Yongwu, Dean of Tencent Academy, were discussing how Tencent could develop new capabilities to sustain its growth miracle and entry into new technologies, expansion into B2B businesses, and... View Details

Keywords: B2B; Talent and Talent Management; Training; Emerging Markets; Entrepreneurship; Globalization; Human Resources; Innovation and Management; Leadership Development; Business Strategy; Information Technology; Internet and the Web; China

Article

A 680,000-Person Megastudy of Nudges to Encourage Vaccination in Pharmacies

By: Katherine L. Milkman, Linnea Gandhi, Mitesh S. Patel, Heather N. Graci, Dena M. Gromet, Hung Ho, Joseph S. Kay, Timothy W. Lee, Jake Rothschild, Jonathan E. Bogard, Ilana Brody, Christopher F. Chabris, Edward Chang, Gretchen B. Chapman, Jennifer E. Dannals, Noah J. Goldstein, Amir Goren, Hal Hershfield, Alex Hirsch, Jillian Hmurovic, Samantha Horn, Dean Karlan, Ariella S. Kristal, Cait Lamberton, Michael N. Meyer, Allison H. Oakes, Maurice E. Schweitzer, Maheen Shermohammed, Jaochim H. Talloen, Caleb Warren, Ashley V. Whillans, Kuldeep N. Yadav, Julian J. Zlatev, Ron Berman, Chalanda N. Evans, Rahul Ladhania, Jens Ludwig, Nina Mazar, Sendhil Mullainathan, Christopher K. Snider, Jann Spiess, Eli Tsukayama, Lyle Ungar, Christophe Van den Bulte, Kevin G. Volpp and Angela L. Duckworth

Encouraging vaccination is a pressing policy problem. To assess whether text-based reminders can encourage pharmacy vaccination and what kinds of messages work best, we conducted a megastudy. We randomly assigned 689,693 Walmart pharmacy patients to receive one of 22... View Details

Keywords: Vaccination; Vaccines; Nudges; Communication Strategy; Communication Technology; Consumer Behavior; Health Care and Treatment

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January 2022
Case

Hybrid Classroom - an Opportunity or a Threat?

By: V.G. Narayanan

When the Covid pandemic struck in the spring of 2020, HBS pivoted to remote instruction while maintaining the interactive and engaged discussions which distinguished the case system pedagogy. In fall 2020 HBS adopted a hybrid approach, fitting out its classrooms with... View Details

Keywords: Education; Teaching; Higher Education; Technology Adoption; Digital Platforms; Internet and the Web; Adaptation; Opportunities; Education Industry

Article

Megastudies Improve the Impact of Applied Behavioural Science

By: Katherine L. Milkman, Dena Gromet, Hung Ho, Joseph S. Kay, Timothy W. Lee, Pepi Pandiloski, Yeji Park, Aneesh Rai, Max Bazerman, John Beshears, Lauri Bonacorsi, Colin Camerer, Edward Chang, Gretchen Chapman, Robert Cialdini, Hengchen Dai, Lauren Eskreis-Winkler, Ayelet Fishbach, James J. Gross, Samantha Horn, Alexa Hubbard, Steven J. Jones, Dean Karlan, Tim Kautz, Erika Kirgios, Joowon Klusowski, Ariella Kristal, Rahul Ladhania, Jens Ludwig, George Loewenstein, Barbara Mellers, Sendhil Mullainathan, Silvia Saccardo, Jann Spiess, Gaurav Suri, Joachim H. Talloen, Jamie Taxer, Yaacov Trope, Lyle Ungar, Kevin G. Volpp, Ashley V. Whillans, Jonathan Zinman and Angela L. Duckworth

Policy-makers are increasingly turning to behavioural science for insights about how to improve citizens’ decisions and outcomes. Typically, different scientists test different intervention ideas in different samples using different outcomes over different time... View Details

Keywords: Policy Making; Behavioral Science; Behavior; Change; Decision Making; Policy

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July 2021
Supplement

Pershing Square's Pandemic Trade (B)

By: Emil N. Siriwardane, Luis M. Viceira and Dean Xu

July 2021 (Revised December 2021)
Case

Pershing Square's Pandemic Trade (A)

By: Emil N. Siriwardane, Luis M. Viceira, Dean Xu and Lucas Baker

This case explores the decision that Bill Ackman, CEO and founder of the hedge fund Pershing Square Capital, was considering in late February 2020 about hedging the exposure of the fund’s portfolio from the potential financial fallout ensuing from an extreme event like... View Details

Keywords: Health Pandemics; Financial Liquidity; Cost Management; Decision Choices and Conditions; Risk Management

July 2021
Supplement

Pershing Square's Pandemic Trade (C)

By: Emil N. Siriwardane, Luis M. Viceira and Dean Xu

July 2021
Supplement

Pershing Square's Pandemic Trade (D)

By: Emil N. Siriwardane, Luis M. Viceira and Dean Xu

June 2021
Case

Modern Endowment Management: Paula Volent and the Bowdoin Endowment

By: Luis M. Viceira, Emily R. McComb and Dean Xu

This case examines modern endowment investment management through the lens of a leadership transition between Chief Investment Officers (CIOs). In March 2021, Paula Volent is about to step down as the CIO of the endowment of Bowdoin College after twenty-one years, and... View Details

Keywords: Investment Portfolio; Investment Banking; Growth Management; Investment Return; Capital Markets; Interest Rates; Competition; Cost Management; Risk Management; Financial Liquidity; Performance Evaluation

Article

A Megastudy of Text-Based Nudges Encouraging Patients to Get Vaccinated at an Upcoming Doctor's Appointment

By: Katherine L. Milkman, Mitesh S. Patel, Linnea Gandhi, Heather N. Graci, Dena M. Gromet, Hung Ho, Joseph S. Kay, Timothy W. Lee, Modupe Akinola, John Beshears, Jonathan E. Bogard, Alison Buttenheim, Christopher F. Chabris, Gretchen B. Chapman, James J. Choi, Hengchen Dai, Craig R. Fox, Amir Goren, Matthew D. Hilchey, Jillian Hmurovic, Leslie K. John, Dean Karlan, Melanie Kim, David Laibson, Cait Lamberton, Brigitte C. Madrian, Michelle N. Meyer, Maria Modanu, Jimin Nam, Todd Rogers, Renante Rondina, Silvia Saccardo, Maheen Shermohammed, Dilip Soman, Jehan Sparks, Caleb Warren, Megan Weber, Ron Berman, Chalanda N. Evans, Christopher K. Snider, Eli Tsukayama, Christophe Van den Bulte, Kevin G. Volpp and Angela L. Duckworth

Many Americans fail to get life-saving vaccines each year, and the availability of a vaccine for COVID-19 makes the challenge of encouraging vaccination more urgent than ever. We present a large field experiment (N = 47,306) testing 19 nudges delivered to patients via... View Details

Keywords: Vaccination; COVID-19; Nudge; Influenza; Field Experiment; Health; Communication Strategy; Behavior

April 2021 (Revised April 2022)
Case

Next Insurance: Considering New Markets

By: David S. Scharfstein, Ishita Sen and Dean Xu

November 2020 (Revised February 2022)
Case

CommonSpirit Health: Integrating a Merger of Equals

By: Robert S. Huckman, Hise Gibson and Nicole Gilmore

Soon after closing the 2019 merger of Catholic Health Initiatives (CHI) and Dignity Health to create CommonSpirit Health, Lloyd Dean and Kevin Lofton-–jointly appointed to the role of CEO—must make several operational and strategic decisions related to the integration... View Details

Keywords: Health Care Delivery; Hospital; Merger; Merger Integration; Hospital Mergers; Health Information Technology; CEOs; Health Care and Treatment; Mergers and Acquisitions; Integration; Leadership; Customer Value and Value Chain; Decision Choices and Conditions; Governance; Information Technology; Health Industry; United States

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