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- All HBS Web (355)
- Faculty Publications (133)
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- All HBS Web (355)
- Faculty Publications (133)
The Power of Experiments
Have you logged into Facebook recently? Searched for something on Google? Chosen a movie on Netflix? If so, you've probably been an unwitting participant in a variety of experiments—also known as randomized controlled trials—designed to test the impact of... View Details
- Article
Do Group Dynamics Influence Social Capital Gains Among Microfinance Clients? Evidence from a Randomized Experiment in Urban India
By: Natalia Rigol, Benjamin Feigenberg, Erica Field, Rohini Pande and Shayak Sarkar
Rigol, Natalia, Benjamin Feigenberg, Erica Field, Rohini Pande, and Shayak Sarkar. "Do Group Dynamics Influence Social Capital Gains Among Microfinance Clients? Evidence from a Randomized Experiment in Urban India." Journal of Policy Analysis and Management 33, no. 4 (Fall 2014): 932–949.
- 2023
- Working Paper
Much Ado About Nothing? Overreaction to Random Regulatory Audits
By: Samuel Antill and Joseph Kalmenovitz
Regulators often audit firms to detect non-compliance. Exploiting a natural experiment in the lobbying industry, we show that firms overreact to audits and this response distorts prices and reduces welfare. Each year, federal regulators audit a random sample of...
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Antill, Samuel, and Joseph Kalmenovitz. "Much Ado About Nothing? Overreaction to Random Regulatory Audits." Working Paper, August 2023.
- March 2016 (Revised February 2023)
- Exercise
Advertising Experiments at RestaurantGrades
By: Michael Luca, Weijia Dai and Hyunjin Kim
Advertising Experiments at RestaurantGrades is an exercise in which students are asked to analyze and make a recommendation on the basis of simulated experimental data. The setting is a hypothetical restaurant review company called RestaurantGrades (RG), which shows...
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Luca, Michael, Weijia Dai, and Hyunjin Kim. "Advertising Experiments at RestaurantGrades." Harvard Business School Exercise 916-038, March 2016. (Revised February 2023.)
- 2020
- Working Paper
(When) Does Appearance Matter? Evidence from a Randomized Controlled Trial
By: Prithwiraj Choudhury, Tarun Khanna, Christos A. Makridis and Subhradip Sarker
While there is evidence about labor market discrimination based on race, religion, and gender, we know little about whether physical appearance leads to discrimination in labor market outcomes. We deploy a randomized experiment on 1,000 respondents in India between...
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Keywords:
Behavioral Economics;
Coronavirus;
Discrimination;
Homophily;
Labor Market Mobility;
Limited Attention;
Resumes;
Personal Characteristics;
Prejudice and Bias
Choudhury, Prithwiraj, Tarun Khanna, Christos A. Makridis, and Subhradip Sarker. "(When) Does Appearance Matter? Evidence from a Randomized Controlled Trial." Harvard Business School Working Paper, No. 21-038, September 2020.
- 2022
- Working Paper
Is Hybrid Work the Best of Both Worlds? Evidence from a Field Experiment
Hybrid work is emerging as a novel form of organizing work globally. This paper reports causal evidence on how the extent of hybrid work—the number of days worked from home relative to days worked from the office—affects work outcomes. Collaborating with an...
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Keywords:
Hybrid Work;
Remote Work;
Work-from-home;
Field Experiment;
Employees;
Geographic Location;
Performance;
Work-Life Balance
Choudhury, Prithwiraj, Tarun Khanna, Christos A. Makridis, and Kyle Schirmann. "Is Hybrid Work the Best of Both Worlds? Evidence from a Field Experiment." Harvard Business School Working Paper, No. 22-063, March 2022.
- 2023
- Working Paper
Should Workplace Programs Be Voluntary or Mandatory? Evidence from a Field Experiment on Mentorship
By: Jason Sandvik, Richard Saouma, Nathan Seegert and Christopher Stanton
In a field experiment, we find large differences in productivity treatment effects between voluntary and mandatory workplace mentorship programs. A significant portion of this difference is due to the best employees opting into the program when it is voluntary and...
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Keywords:
Mentoring;
Mentorship Programs;
Randomized Controlled Trial;
Employees;
Relationships;
Programs;
Performance
Sandvik, Jason, Richard Saouma, Nathan Seegert, and Christopher Stanton. "Should Workplace Programs Be Voluntary or Mandatory? Evidence from a Field Experiment on Mentorship." NBER Working Paper Series, No. 29148, August 2021. (Revised October 2023.)
- January 2024
- Article
Population Interference in Panel Experiments
By: Kevin Wu Han, Guillaume Basse and Iavor Bojinov
The phenomenon of population interference, where a treatment assigned to one experimental unit affects another experimental unit’s outcome, has received considerable attention in standard randomized experiments. The complications produced by population interference in...
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Han, Kevin Wu, Guillaume Basse, and Iavor Bojinov. "Population Interference in Panel Experiments." Journal of Econometrics 238, no. 1 (January 2024).
- 2021
- Working Paper
Population Interference in Panel Experiments
By: Iavor I Bojinov, Kevin Wu Han and Guillaume Basse
The phenomenon of population interference, where a treatment assigned to one experimental unit affects another experimental unit's outcome, has received considerable attention in standard randomized experiments. The complications produced by population interference in...
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Bojinov, Iavor I., Kevin Wu Han, and Guillaume Basse. "Population Interference in Panel Experiments." Harvard Business School Working Paper, No. 21-100, March 2021.
- March 2016 (Revised February 2023)
- Teaching Note
Advertising Experiments at RestaurantGrades
By: Michael Luca, Weijia Dai and Hyunjin Kim
Advertising Experiments at RestaurantGrades is an exercise in which students are asked to analyze and make a recommendation on the basis of simulated experimental data. The setting is a hypothetical restaurant review company called RestaurantGrades (RG), which shows...
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- 05 Nov 2018
- News
Using Experiments to Launch New Products
- 01 Apr 1999
- News
A Random Sampling of HBS Graduates in the News
an odd experience for Kramer the journalist: SEC rules prohibited MarketWatch from covering its own much-anticipated debut - or even from running stories by other news media that might mention it - so as not to unfairly promote its stock....
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- 01 Jun 1999
- News
A Random Sampling of HBS Graduates in the News
Have you heard the one about the minister and the stockbroker waiting in line at the Pearly Gates? St. Peter smiles and says to the stockbroker, "My son, take this silken robe and golden staff and enter the Kingdom of Heaven." Then he tells the minister, "Take this...
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Keywords:
Nancy O. Perry
Achieving Reliable Causal Inference with Data-Mined Variables: A Random Forest Approach to the Measurement Error Problem
Combining machine learning with econometric analysis is becoming increasingly prevalent in both research and practice. A common empirical strategy involves the application of predictive modeling techniques to "mine" variables of interest from available data,...
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- 2024
- Working Paper
Design of Panel Experiments with Spatial and Temporal Interference
By: Tu Ni, Iavor Bojinov and Jinglong Zhao
One of the main practical challenges companies face when running experiments (or A/B tests) over a panel is interference, the setting where one experimental unit's treatment assignment at one time period impacts another's outcomes, possibly at the following time...
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Keywords:
Research
Ni, Tu, Iavor Bojinov, and Jinglong Zhao. "Design of Panel Experiments with Spatial and Temporal Interference." Harvard Business School Working Paper, No. 24-058, March 2024.
- 2023
- Working Paper
Virtual Water Coolers: A Field Experiment on the Role of Virtual Interactions on Organizational Newcomer Performance
Designing management practices to better onboard organizational newcomers working remotely is a key priority for firms. We report results from a randomized field experiment conducted at a large global firm that estimates the performance effects of different types of...
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Keywords:
Remote Work;
Virtual Water Coolers;
Social Interactions;
Careers;
Field Experiment;
Employees;
Interpersonal Communication;
Internet and the Web;
Performance;
Personal Development and Career
Choudhury, Prithwiraj, Jacqueline N. Lane, and Iavor Bojinov. "Virtual Water Coolers: A Field Experiment on the Role of Virtual Interactions on Organizational Newcomer Performance." Harvard Business School Working Paper, No. 21-125, May 2021. (Revised February 2023.)
- 29 Oct 2015
- News
How to Design (and Analyze) a Business Experiment
- May 18, 2012
- Article
Randomized Government Safety Inspections Reduce Worker Injuries with No Detectable Job Loss
By: David I Levine, Michael W. Toffel and Matthew S. Johnson
Controversy surrounds occupational health and safety regulators, with some observers claiming that workplace regulations damage firms' competitiveness and destroy jobs and others arguing that they make workplaces safer at little cost to employers and employees. We...
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Keywords:
Regulation;
Occupational Safety;
Evaluation;
Regression;
Matching;
Difference In Differences;
Safety;
Health;
Working Conditions;
Governing Rules, Regulations, and Reforms;
Competitive Advantage;
Performance;
Manufacturing Industry;
California
Levine, David I., Michael W. Toffel, and Matthew S. Johnson. "Randomized Government Safety Inspections Reduce Worker Injuries with No Detectable Job Loss." Science 336, no. 6083 (May 18, 2012): 907–911. (Online supplement (appendix). Featured in an article by the head of US OSHA, and in U.S. News & World Report and many other news outlets. Basis of U.S. Congressional testimony on promoting safe workplaces.)
- Article
Using Fresh Starts to Nudge Increased Retirement Savings
By: John Beshears, Hengchen Dai, Katherine L. Milkman and Shlomo Benartzi
We conducted a field experiment to study the effect of framing future moments in time as new beginnings (or “fresh starts”). University employees (N=6,082) received mailings with an opportunity to choose between increasing their contributions to a savings plan...
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Keywords:
Choice Architecture;
Randomized Field Experiment;
Savings;
New Beginning;
Fresh Start;
Saving;
Retirement;
Behavior
Beshears, John, Hengchen Dai, Katherine L. Milkman, and Shlomo Benartzi. "Using Fresh Starts to Nudge Increased Retirement Savings." Organizational Behavior and Human Decision Processes 167 (November 2021): 72–87.
- 16 Oct 2008
- Working Paper Summaries
Making the Gambler’s Fallacy Disappear: The Role of Experience
Keywords:
by Gregory M. Barron & Stephen Leider