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Show Results For
- All HBS Web
(11,595)
- People (96)
- News (4,029)
- Research (4,289)
- Events (75)
- Multimedia (225)
- Faculty Publications (2,682)
- 12 Sep 2012
- Working Paper Summaries
Liability Structure in Small-Scale Finance: Evidence from a Natural Experiment
- 15 Jan 2021
- News
To Overcome Vaccine Hesitancy, We Need a Better Patient Experience
- July 2009
- Article
How Is Foreign Aid Spent? Evidence from a Natural Experiment
By: Eric D. Werker, Faisal Z. Ahmed and Charles Cohen
We use oil price fluctuations to test the impact of transfers from wealthy OPEC nations to their poorer Muslim allies. The instrument identifies plausibly exogenous variation in foreign aid. We investigate how aid is spent by tracking its short-run effect on aggregate... View Details
Werker, Eric D., Faisal Z. Ahmed, and Charles Cohen. "How Is Foreign Aid Spent? Evidence from a Natural Experiment." American Economic Journal: Macroeconomics 1, no. 2 (July 2009): 225–244. (Reprinted in Geopolitics of Foreign Aid, ed. Helen Milner and Dustin Tingley. Northampton: Edward Elgar, 2013.)
- November 1990
- Article
The Impact of Race on Managers' Experiences of Developmental Relationships
By: D. A. Thomas
Thomas, D. A. "The Impact of Race on Managers' Experiences of Developmental Relationships." Journal of Organizational Behavior 2, no. 4 (November 1990): 479–492.
- Article
Measuring the Scientific Effectiveness of Contact Tracing: Evidence from a Natural Experiment
By: Thiemo Fetzer and Thomas Graeber
Contact tracing has for decades been a cornerstone of the public health approach to epidemics, including Ebola, severe acute respiratory syndrome, and now COVID-19. It has not yet been possible, however, to causally assess the method’s effectiveness using a randomized... View Details
Fetzer, Thiemo, and Thomas Graeber. "Measuring the Scientific Effectiveness of Contact Tracing: Evidence from a Natural Experiment." Proceedings of the National Academy of Sciences 118, no. 33 (August 17, 2021): 1–4.
- 2023
- Working Paper
Personalized Game Design for Improved User Retention and Monetization in Freemium Games
By: Eva Ascarza, Oded Netzer and Julian Runge
One of the most crucial aspects and significant levers that gaming companies possess in designing
digital games is setting the level of difficulty, which essentially regulates the user’s ability to
progress within the game. This aspect is particularly significant in... View Details
Keywords: Freemium; Retention/churn; Field Experiment; Field Experiments; Gaming; Gaming Industry; Mobile App; Mobile App Industry; Monetization; Monetization Strategy; Games, Gaming, and Gambling; Mobile and Wireless Technology; Customers; Retention; Product Design; Strategy
Ascarza, Eva, Oded Netzer, and Julian Runge. "Personalized Game Design for Improved User Retention and Monetization in Freemium Games." Harvard Business School Working Paper, No. 21-062, November 2020. (Revised December 2023.)
- November 2009
- Article
Finding Missing Markets (and a Disturbing Epilogue): Evidence from an Export Crop Adoption and Marketing Intervention in Kenya
By: Nava Ashraf, Xavier Gine and Dean Karlan
Farmers may grow crops for local consumption despite more profitable export options. DrumNet, a Kenyan NGO that helps small farmers adopt and market export crops, conducted a randomized trial to evaluate its impact. DrumNet services increased production of export crops... View Details
Keywords: Export Crop; Field Experiment; Food Safety Standards; Plant-Based Agribusiness; Trade; Profit; Marketing; Standards; Failure; Non-Governmental Organizations; Agriculture and Agribusiness Industry; Kenya; European Union
Ashraf, Nava, Xavier Gine, and Dean Karlan. "Finding Missing Markets (and a Disturbing Epilogue): Evidence from an Export Crop Adoption and Marketing Intervention in Kenya." American Journal of Agricultural Economics 91, no. 4 (November 2009): 973–990.
- winter 2008
- Article
People Are Experience Goods: Improving Online Dating with Virtual Dates
By: Jeana H. Frost, Zoe Chance, Michael I. Norton and Dan Ariely
Frost, Jeana H., Zoe Chance, Michael I. Norton, and Dan Ariely. "People Are Experience Goods: Improving Online Dating with Virtual Dates." Journal of Interactive Marketing 22, no. 1 (winter 2008): 51–62.
- Research Summary
What Makes the Bonding Stick? A Natural Experiment Testing the Legal Bonding Hypothesis
On March 29, 2010, the U.S. Supreme Court signaled its intention to geographically limit the reach of the U.S. securities antifraud regime and thus differentially exclude U.S.-listed foreign firms from the ambit of formal U.S. antifraud enforcement. We use this legal... View Details
- July 2023
- Article
So, Who Likes You? Evidence from a Randomized Field Experiment
By: Ravi Bapna, Edward McFowland III, Probal Mojumder, Jui Ramaprasad and Akhmed Umyarov
With one-third of marriages in the United States beginning online, online dating platforms have become important curators of the modern social fabric. Prior work on online dating has elicited two critical frictions in the heterosexual dating market. Women, governed by... View Details
Keywords: Online Dating; Internet and the Web; Analytics and Data Science; Gender; Emotions; Social and Collaborative Networks
Bapna, Ravi, Edward McFowland III, Probal Mojumder, Jui Ramaprasad, and Akhmed Umyarov. "So, Who Likes You? Evidence from a Randomized Field Experiment." Management Science 69, no. 7 (July 2023): 3939–3957.
- 2014
- Working Paper
Don't Take 'No' for an Answer: An Experiment with Actual Organ Donor Registrations
By: Judd B. Kessler and Alvin E. Roth
Over 10,000 people in the U.S. die each year while waiting for an organ. Attempts to increase organ transplantation have focused on changing the registration question from an opt-in frame to an active choice frame. We analyze this change in California and show it... View Details
Keywords: Decision Choices and Conditions; Health Care and Treatment; Philanthropy and Charitable Giving; Health Industry
Kessler, Judd B., and Alvin E. Roth. "Don't Take 'No' for an Answer: An Experiment with Actual Organ Donor Registrations." NBER Working Paper Series, No. 20378, August 2014.
- Article
Savings in Transnational Households: A Field Experiment Among Migrants from El Salvador
By: Nava Ashraf, Diego Aycinena, Claudia Martinez A. and Dean Yang
While remittance flows to developing countries are very large, it is unknown whether migrants desire more control over how remittances are used. This research uses a randomized field experiment to investigate the importance of migrant control over the use of... View Details
Keywords: Migration; Remittances; Intrahousehold Allocation; Savings; Saving; Residency; Banks and Banking; Banking Industry; El Salvador; United States
Ashraf, Nava, Diego Aycinena, Claudia Martinez A., and Dean Yang. "Savings in Transnational Households: A Field Experiment Among Migrants from El Salvador." Review of Economics and Statistics 97, no. 2 (May 2015): 332–351.
- 2010
- Conference Presentation
Induced Variation in Administrative Systems: Experimenting with Contexts for Innovation
By: Adrian Caldart, Roberto Vassolo and Luciana Silvestri
Keywords: Evolutionary Perspective On Strategic Management; International Business; Management; Organizational Design; Globalization
Caldart, Adrian, Roberto Vassolo, and Luciana Silvestri. "Induced Variation in Administrative Systems: Experimenting with Contexts for Innovation." Paper presented at the Academy of Management Annual Meeting, Montréal, Canada, 2010.
- December 2010
- Article
Can Higher Prices Stimulate Product Use? Evidence from a Field Experiment in Zambia
By: Nava Ashraf, James Berry and Jesse M. Shapiro
The controversy over how much to charge for health products in the developing world rests, in part, on whether higher prices can increase use, either by targeting distribution to high-use households (a screening effect), or by stimulating use psychologically through a... View Details
Ashraf, Nava, James Berry, and Jesse M. Shapiro. "Can Higher Prices Stimulate Product Use? Evidence from a Field Experiment in Zambia." American Economic Review 100, no. 5 (December 2010): 2383–2413. (Online Appendix.)
- 2015
- Working Paper
The U.S. Experiment with Fair Trade Laws: State Police Powers, Federal Antitrust, and the Politics of 'Fairness,' 1890-1938
By: Laura Phillips Sawyer
Prior to the Great Depression and President Franklin Roosevelt's New Deal programs, considerable pressure for antitrust revision came from trade associations of independent proprietors. A perhaps unlikely leader, Edna Gleason, organized California's retail pharmacists... View Details
Keywords: Competition; Fairness; Laws and Statutes; Supply and Industry; Business and Government Relations
Phillips Sawyer, Laura. "The U.S. Experiment with Fair Trade Laws: State Police Powers, Federal Antitrust, and the Politics of 'Fairness,' 1890-1938." Harvard Business School Working Paper, No. 16-060, November 2015.
- April 2021
- Article
Competition and Gender in the Lab vs Field: Experiments from Off-grid Renewable Energy Entrepreneurs in Rural Rwanda
By: Rebecca Klege, Martine Visser, Manuel Barron and Rowan P. Clarke
Klege, Rebecca, Martine Visser, Manuel Barron, and Rowan P. Clarke. "Competition and Gender in the Lab vs Field: Experiments from Off-grid Renewable Energy Entrepreneurs in Rural Rwanda." Art. 101662. Journal of Behavioral and Experimental Economics 91 (April 2021).
- 2006
- Working Paper
Can Higher Prices Stimulate Product Use? Evidence from a Field Experiment in Zambia
By: Nava Ashraf, James Berry and Jesse M. Shapiro
The controversy over whether and how much to charge for health products in the developing world rests, in part, on whether higher prices can increase use, either by targeting distribution to high-use households (a screening effect), or by stimulating use... View Details
Ashraf, Nava, James Berry, and Jesse M. Shapiro. "Can Higher Prices Stimulate Product Use? Evidence from a Field Experiment in Zambia." Harvard Business School Working Paper, No. 07-034, December 2006. (Forthcoming, American Economic Review.)
- 2023
- Working Paper
Efficient Discovery of Heterogeneous Quantile Treatment Effects in Randomized Experiments via Anomalous Pattern Detection
By: Edward McFowland III, Sriram Somanchi and Daniel B. Neill
In the recent literature on estimating heterogeneous treatment effects, each proposed method makes its own set of restrictive assumptions about the intervention’s effects and which subpopulations to explicitly estimate. Moreover, the majority of the literature provides... View Details
Keywords: Causal Inference; Program Evaluation; Algorithms; Distributional Average Treatment Effect; Treatment Effect Subset Scan; Heterogeneous Treatment Effects
McFowland III, Edward, Sriram Somanchi, and Daniel B. Neill. "Efficient Discovery of Heterogeneous Quantile Treatment Effects in Randomized Experiments via Anomalous Pattern Detection." Working Paper, 2023.
Will a Five-Minute Discussion Change Your Mind? A Countrywide Experiment on Voter Choice in France
This paper provides the first estimate of the effect of door-to-door canvassing on actual electoral outcomes, via a countrywide experiment embedded in Francois Hollande’s campaign in the 2012 French presidential election. While existing experiments randomized... View Details
- 16 Jun 2020
- News