Publications
Publications
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- All HBS Web
(3,909)
- Faculty Publications (964)
- 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
- 2022
- Working Paper
Banking on Transparency for the Poor: Experimental Evidence from India
By: Erica M. Field, Natalia Rigol, Charity M. Troyer Moore, Rohini Pande and Simone G. Schaner
Do information frictions limit the benefits of financial inclusion drives for the rural poor? We evaluate an experimental intervention among recently banked poor Indian women receiving government cash transfers via direct deposit. Treated women were provided automated... View Details
- June 2022
- Case
Mossadeq’s Gambit: The US, UK, and Iranian Oil Nationalization
By: Jeremy Friedman and Jingyu Liu
Many of the West’s political problems in the Middle East and in Iran in particular can be traced to the overthrow of Prime Minister Mohammad Mossadegh by military forces supported by the American CIA and the British MI6 in August 1953. Mossadegh, at the head of a... View Details
- June 2022
- Case
Business Implications from Regulating Carbon Emissions in the EU
By: George Serafeim and Benjamin Maletta
In the beginning of the 21st century, the European Union (the EU) had led the global fight against climate change with a wide array of policy measures. The EU’s primary approach to climate policy had been taxation via the European Union Emissions Trading System (EU... View Details
- May 2022
- Article
Coins for Bombs: The Predictive Ability of On-Chain Transfers for Terrorist Attacks
By: Dan Amiram, Evgeny Lyandres and Daniel Rabetti
This study examines whether we can learn from the behavior of blockchain-based transfers to predict the financing of terrorist attacks. We exploit blockchain transaction transparency to map millions of transfers for hundreds of large on-chain service providers. The... View Details
- 2022
- Chapter
Lessons Learned from Support to Business during COVID-19
By: Gabriel Chodorow-Reich, Benjamin Iverson and Adi Sunderam
The authors survey the new federal subsidies and loans provided to businesses in the first year of the pandemic—including the Paycheck Protection Program (PPP), the Economic Injury Disaster Loan (EIDL) program, and aid targeted at specific industries such as airlines... View Details
- 2022
- Working Paper
Small Campaign Donors
By: Laurent Bouton, Julia Cagé, Edgard Dewitte and Vincent Pons
In this paper, we study the characteristics and behavior of small donors, and compare them to those of large donors. We first build a novel dataset including all the 340 million individual contributions reported to the U.S. Federal Election Commission between 2005 and... View Details
- 2022
- Working Paper
THEMIS: A Framework for Cost-Benefit Analysis of COVID-19 Non-Pharmaceutical Interventions
By: Dimitris Bertsimas, Michael Lingzhi Li and Saksham Soni
Since December 2019, the world has been ravaged by the COVID-19 pandemic, with over 150 million confirmed cases and 3 million confirmed deaths worldwide. To combat the spread of COVID-19, governments have issued unprecedented non-pharmaceutical interventions (NPIs),... View Details
Keywords: COVID-19; Health Pandemics; Policy; Framework; Cost vs Benefits; Outcome or Result; United States; Germany; Brazil; Singapore; Spain
- March 2022 (Revised August 2022)
- Case
Swvl: Smart Mobility for the Masses
By: Krishna Palepu, Esel Çekin and Menna Hassan
The case focuses on strategy and governance issues at Swvl, a tech-enabled mass mobility marketplace. It describes the journey of CEO and Chairman Mostafa Kandil on his journey from founding the company to its listing on Nasdaq. Since its founding in Egypt in 2017,... View Details
- March 2022
- Case
Copper Nationalization in Chile
By: Jeremy Friedman, John Masko and Jingyu Liu
In 1970 Chile became the first country to elect a Marxist president through open, multi-party elections in Salvador Allende. In his first year as president, Allende nationalized the copper industry, Chile’s largest export industry that was developed and owned by US... View Details
- March 2022
- Case
Metric
By: Christina Wallace, Rebecca Cink and Maria Lappas
Megan Murday, the founder of Metric, an environmental, social, and corporate governance (ESG) analytics startup, must decide which customer segment to target as a beachhead market. She received positive feedback from a Swiss venture capital (VC) firm, indicating their... View Details
- March 2022
- Article
Estimating the Effectiveness of Permanent Price Reductions for Competing Products Using Multivariate Bayesian Structural Time Series Models
By: Fiammetta Menchetti and Iavor Bojinov
Researchers regularly use synthetic control methods for estimating causal effects when a sub-set of units receive a single persistent treatment, and the rest are unaffected by the change. In many applications, however, units not assigned to treatment are nevertheless... View Details
- 2022
- Article
Which Corporate ESG News Does the Market React To?
By: George Serafeim and Aaron Yoon
Using a dataset that classifies firm-level ESG news as positive and negative, we examine how stock prices react to different types of ESG news. We analyze 111,020 firm-day observations for 3,126 companies and find that prices react only to issues identified as... View Details
- February 2022 (Revised May 2022)
- Case
Jaypee Infratech and the Indian Bankruptcy Code
By: Kristin Mugford, William Vrattos and Radhika Kak
In 2016, India passed a new bankruptcy law (IBC) to counter a brewing bank crisis and increased corporate distress. Homebuilder Jaypee Infratech, one of India largest distressed companies (the “dirty dozen”) began restructuring under the IBC in 2017. Two years later,... View Details
Keywords: Restructuring; Decisions; Judgments; Voting; Developing Countries and Economies; Financial Crisis; Public Sector; Asset Pricing; Borrowing and Debt; Corporate Finance; Credit; Insolvency and Bankruptcy; Debt Securities; Bonds; Investment Return; Price; Government Legislation; Laws and Statutes; Bids and Bidding; Business and Stakeholder Relations; Risk and Uncertainty; Valuation; Real Estate Industry; India; Delhi
- February 2022
- Case
Leading The UK Vaccine Task Force
By: Amy C. Edmondson and Claudia Pienica
This case describes the first six months of the UK Vaccine Taskforce, under the leadership of Kate Bingham. With a career spent in the private sector as a biotech investor, Bingham’s appointment within the government was considered unusual. The overarching brief given... View Details
Keywords: COVID-19; Vaccine; Government; Health Pandemics; Health Care and Treatment; Science; Innovation and Invention; Groups and Teams; Leadership; Decision Making; Government and Politics; Health; Innovation and Management; Governance; Change; Government Administration; Health Industry; Financial Services Industry; Public Administration Industry; Europe; United Kingdom
- February 2022
- Case
Paul Polman
By: Elizabeth A. Keenan, Youngme Moon and Susie Ma
Over his 40-year career, Paul Polman had led some of the world’s largest consumer goods companies, making his biggest mark as CEO of Unilever—a multi-national corporation that produced everything from soap to soup. Polman was also well-regarded as a leader in corporate... View Details
- February 2022
- Supplement
SpartanNash Company: The Amazon Warrants (A)
By: Benjamin C. Esty, E. Scott Mayfield and Daniel Fisher
As of 12/31/21, Amazon held $22 billion of equity and warrants in related companies. In fact, it often requests a free grant of warrants when it enters into a new commercial agreement with a supplier. Over the past 20 years, Amazon has gotten warrants almost 20... View Details
- 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
- Working Paper
Consumer Reviews and Regulation: Evidence from NYC Restaurants
By: Chiara Farronato and Georgios Zervas
We investigate the informativeness of hygiene signals in online reviews, and their effect on consumer choice and restaurant hygiene. We first extract signals of hygiene from Yelp. Among all dimensions that regulators monitor through mandated restaurant inspections, we... 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