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- 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
- 2022
- Chapter
Creating 'Smart' Policy to Promote Entrepreneurship and Innovation
By: Karen G. Mills and Annie Dang
Entrepreneurship is a key to unlocking innovation and fostering regional and national economic productivity. Extensive studies demonstrate that small and young firms contribute to innovation and employment growth. But which of the many types of small firms are... View Details
- 2022
- Working Paper
Electoral Turnovers
By: Benjamin Marx, Vincent Pons and Vincent Rollet
In most national elections, voters face a key choice between continuity and change. Electoral turnovers occur when the incumbent candidate or party fails to win reelection. To understand how turnovers affect national outcomes, we study the universe of presidential and... View Details
- February 2022 (Revised March 2022)
- Case
MicroStrategy's Investment in Bitcoin
By: C. Fritz Foley
At the end of the second quarter of 2020, MicroStrategy, a Virginia based provider of analytics software and services, announced plans to acquire and hold bitcoin as a part of the firm’s treasury reserve policy and corporate strategy. Within a year, the firm purchased... View Details
- February 2022
- Article
Sugar-sweetened Beverage Purchases and Intake at Event Arenas with and without a Portion Size Cap
By: Sheri Volger, James Scott Parrott, Brian Elbel, Leslie K. John, Jason P. Block, Pamela Rothpletz-Puglia and Christina A. Roberto
This is the first real-world study to examine the association between a voluntary 16-ounce (oz.) portion-size cap on sugar-sweetened beverages (SSB) at a sporting arena on volume of SSBs and food calories purchased and consumed during basketball games. Cross-sectional... View Details
- 2022
- Chapter
The Servicification of the U.S. Economy: The Role of Startups versus Incumbent Firms
By: Mercedes Delgado, J. Daniel Kim and Karen G. Mills
Over the last few decades, the U.S. economy has exhibited a significant shift from manufacturing towards services. This transition has been particularly prominent in an important subcategory of services industries that drives innovation and employs many high-wage... View Details
- 2024
- Working Paper
What Triggers National Stock Market Jumps?
By: Scott R. Baker, Nicholas Bloom, Steven J. Davis and Marco Sammon
We examine newspapers the day after major stock-market jumps to evaluate the proximate cause, geographic source, and clarity of these events from 1900 in the US, 1930 in the UK and 1980 in 12 other countries. We find four main results. First, the United States plays an... View Details
- January 2022 (Revised February 2022)
- Case
Envision Group
By: Gunnar Trumbull, Bonnie Yining Cao and Dawn H. Lau
Based in China, Envision was one of the world’s leading Greentech companies. Chief Executive Officer Lei Zhang had set the goal of achieving carbon neutrality across the company’s global operations and supply chain by 2022 and 2028 respectively. As part of its... View Details
Keywords: Green Technology; Climate Change; Emerging Markets; Information Technology; Strategy; Management; Renewable Energy; Energy Policy; Environmental Sustainability; Manufacturing Industry; Auto Industry; Green Technology Industry; Battery Industry; China; United States; Japan; United Kingdom; France
- January 2022 (Revised March 2022)
- Case
Chinese Restriction, Violence, and Exclusion in the United States
By: Tom Nicholas, Boyang Han and Tomas Rosales
Many early Chinese immigrants to the United States during the 1850s worked as traditional gold miners, but as gold mining declined in significance, an increasing number were employed as laborers for large scale construction projects such as railroads, roadways, and in... View Details
Keywords: Immigration Acts; Immigration; Labor; Jobs and Positions; Race; Social Issues; Laws and Statutes
- January 2022
- Background Note
The Florange Law: Encouraging Long-Termism in Equity Markets?
By: Charles C.Y. Wang and Tonia Labruyere
This note provides background information on a French law (“the Florange law”) passed in 2014 that the French government said would encourage long-term shareholdings. The note describes the law, what led to it, the reactions it evoked, and similar initiatives in other... View Details
- 2022
- Working Paper
Talent Flows and the Geography of Knowledge Production: Causal Evidence from Multinational Firms
By: Dany Bahar, Prithwiraj Choudhury, Sara Signorelli and James M. Sappenfield
Leveraging a unique dataset merging patent data with all work-related migration reforms that took place in 15 countries over 26 years, we show that reforms discouraging inventor mobility decrease the patenting of MNE subsidiaries within a country, while reforms... View Details
- January 2022 (Revised November 2023)
- Supplement
Uber in China (C): The Cost of Success for Didi
By: William C. Kirby and Noah B. Truwit
On June 30, 2021, ride-hailing giant Didi Chuxing (Didi) raised $4.4 billion in its initial public offering (IPO) on the New York Stock Exchange (NYSE), the largest IPO of a Chinese company listed on an American exchange since Alibaba raised $25 billion in 2014.... View Details
- January 2022
- Teaching Plan
Just Arrived: Integrating Refugees in Sweden
By: Brian Trelstad and Emilie Billaud
Teaching Plan for HBS Case No. 321-040. Just Arrived is an online platform that matches newly-arrived immigrants in Sweden with employment opportunities. As one of several for-profit and non-profit start-ups in Europe that is looking to address the refugee crisis, the... View Details
- Article
Geographic Mobility, Immobility, and Geographic Flexibility—A Review and Agenda for Research on the Changing Geography of Work
I review and integrate a wide range of literature that has examined how geographic mobility of high-skilled workers creates value for organizations and individuals. Drawing on this interdisciplinary literature, I document that geographic mobility creates value by... View Details
- January 2022
- Article
Global Behaviors, Perceptions, and the Emergence of Social Norms at the Onset of the COVID-19 Pandemic
By: Lukas Hensel, Marc Witte, Stefano Caria, Thiemo Fetzer, Stefano Fiorin, Friedrich M. Goetz, Margarita Gomez, Johannes Haushofer, Andriy Ivchenko, Gordon T. Kraft-Todd, Elena Reutskaja, Christopher Roth, Erez Yoeli and Jon M. Jachimowicz
We conducted a large-scale survey covering 58 countries and over 100,000 respondents between late March and early April 2020 to study beliefs and attitudes towards citizens' and governments' responses at the onset of the COVID-19 pandemic. Most respondents reported... View Details
- 2022
- Book
Ripe for Revolution: Building Socialism in the Third World
By: Jeremy Friedman
A historical account of ideology in the Global South as the postwar laboratory of socialism, its legacy following the Cold War, and the continuing influence of socialist ideas worldwide.
In the first decades after World War II, many newly independent... View Details
In the first decades after World War II, many newly independent... View Details
- 2022
- Working Paper
The Fed and the Secular Decline in Interest Rates
In this paper I document a striking fact: a narrow window around Fed meetings fully captures the secular decline in U.S. Treasury yields since 1980. By contrast, yield movements outside this window are transitory and wash out over time. This is surprising because the... View Details
- 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
- Column
The Changing Geography of Work: Priorities for Policy Makers
The COVID-19 pandemic thrust the issue of how and where we work into the spotlight. The adoption of remote and hybrid work increased exponentially as lockdowns necessitated social distancing. But now, as we enter a new phase of the pandemic, the Geography of Work—where... View Details
Keywords: Remote Work; Hybrid Work Model; Work-from-anywhere; Employees; Geographic Location; Policy
- Article
A Prescriptive Analytics Framework for Optimal Policy Deployment Using Heterogeneous Treatment Effects
By: Edward McFowland III, Sandeep Gangarapu, Ravi Bapna and Tianshu Sun
We define a prescriptive analytics framework that addresses the needs of a constrained decision-maker facing, ex ante, unknown costs and benefits of multiple policy levers. The framework is general in nature and can be deployed in any utility maximizing context, public... View Details