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All HBS Web
(1,345)
- People (1)
- News (185)
- Research (991)
- Events (12)
- Multimedia (8)
- Faculty Publications (519)
Pre-colonial Ethnic Institutions and Contemporary African Development
We investigate the role of deeply-rooted pre-colonial ethnic institutions in shaping comparative regional development within African countries. We combine information on the spatial distribution of ethnicities before colonization with regional variation in... View Details
Climate Change in 2017: Implications for Business
This note provides general information about climate change and its implications for business. Included is an overview of climate change science and a number of its impacts, including rising sea levels, changing weather patterns and extreme weather, pressure on...
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- Forthcoming
- Article
The Disappearing Index Effect
By: Robin Greenwood and Marco Sammon
The abnormal return associated with a stock being added to the S&P 500 has fallen from an average
of 7.4% in the 1990s to 0.3% over the past decade. This has occurred despite a significant increase in the
share of stock market assets linked to the index. A similar...
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Greenwood, Robin, and Marco Sammon. "The Disappearing Index Effect." Journal of Finance (forthcoming).
- Article
Internal Deadlines, Drug Approvals, and Safety Problems
By: Lauren Cohen, Umit Gurun and Danielle Li
Absent explicit quotas, incentives, reporting, or fiscal year-end motives, drug approvals around the world surge in December, at month-ends, and before respective major national holidays. Drugs approved before these informal deadlines are associated with significantly...
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Keywords:
Health;
Economics;
Government and Politics;
Innovation and Invention;
Research;
Science;
Biotechnology Industry;
Health Industry;
Pharmaceutical Industry
Cohen, Lauren, Umit Gurun, and Danielle Li. "Internal Deadlines, Drug Approvals, and Safety Problems." American Economic Review: Insights 3, no. 1 (March 2021): 67–82.
- February 2019
- Article
Does It Matter If Your Health Insurer Is For Profit? Effects of Ownership on Premiums, Insurance Coverage, and Medical Spending
By: Leemore S. Dafny
There is limited empirical evidence about the impact of for-profit health insurers on various outcomes. I study the effects of conversions to for-profit status by Blue Cross Blue Shield (BCBS) affiliates in 11 states, spanning 28 geographic markets. I find both the...
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Keywords:
Health Insurance;
Medical Loss Ratio;
Blue Cross;
Corporate Governance;
Health;
Insurance;
For-Profit Firms;
Insurance Industry;
United States
Dafny, Leemore S. "Does It Matter If Your Health Insurer Is For Profit? Effects of Ownership on Premiums, Insurance Coverage, and Medical Spending." American Economic Journal: Economic Policy 11, no. 1 (February 2019): 222–265.
- January–February 2012
- Article
A Simple Model Relating Accruals to Risk, and its Implications for the Accrual Anomaly
By: Mozaffar N. Khan
This paper models systematic risk as a function of mean-reverting accruals. When the true abnormal returns are zero, but the true betas are empirically unobserved, the model predicts the anomalous pattern of empirical results on the accrual anomaly: (i) CAPM abnormal...
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Khan, Mozaffar N. "A Simple Model Relating Accruals to Risk, and its Implications for the Accrual Anomaly." Journal of Business Finance & Accounting 39, nos. 1-2 (January–February 2012): 35–59.
- Article
Pre-colonial Ethnic Institutions and Contemporary African Development
By: Stelios Michalopoulos and Elias Papaioannou
We investigate the role of deeply rooted pre-colonial ethnic institutions in shaping comparative regional development within African countries. We combine information on the spatial distribution of ethnicities before colonization with regional variation in contemporary...
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Michalopoulos, Stelios, and Elias Papaioannou. "Pre-colonial Ethnic Institutions and Contemporary African Development." Econometrica 81, no. 1 (January 2013): 113–152.
- July 2011
- Article
Institutions and Inequality in Single Party Regimes: A Comparative Analysis of Vietnam and China
Despite the fact that China and Vietnam have been the world's two fastest growing economies over the past two decades, their income inequality patterns are very different. In this paper, we take a deep look at political institutions in the two countries, demonstrating...
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Keywords:
Equality and Inequality;
Developing Countries and Economies;
Motivation and Incentives;
Government and Politics;
Policy;
Power and Influence;
Decision Making;
Income;
China;
Viet Nam
Malesky, Edmund, Regina M. Abrami, and Yu Zheng. "Institutions and Inequality in Single Party Regimes: A Comparative Analysis of Vietnam and China." Comparative Politics 43, no. 4 (July 2011).
- 2008
- Working Paper
Welfare Payments and Crime
By: C. Fritz Foley
This paper tests the hypothesis that the timing of welfare payments affects criminal activity. Analysis of daily reported incidents of major crimes in twelve U.S. cities reveals an increase in crime over the course of monthly welfare payment cycles. This increase...
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Foley, C. Fritz. "Welfare Payments and Crime." NBER Working Paper Series, No. 14074, June 2008.
Why Startups Fail
My book Why Startups Fail: A New Roadmap for Entrepreneurial Success is organized in three parts. Part I looks at three common failure patterns for early-stage...
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- Forthcoming
- Article
On the Origins of Restricting Women's Promiscuity
By: Anke Becker
This paper studies the origins and function of customs and norms that intend to keep women from being promiscuous. Using large-scale survey data from more than 100 countries, I test the anthropological theory that a particular form of preindustrial...
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- 05 Jan 2017
- Working Paper Summaries
High-Skilled Migration and Agglomeration
- 01 Jul 2010
- Working Paper Summaries
Cyclicality of Credit Supply: Firm Level Evidence
- 02 Jul 2009
- Working Paper Summaries
Technology Innovation and Diffusion as Sources of Output and Asset Price Fluctuations
- January 2020
- Article
The Market Reacts Quickly: Changes in Paclitaxel Vascular Device Purchasing Within the Ascension Healthcare System
By: Peter P. Monteleone, Subhash Banerjee, Priya Kothapalli, Ariel Dora Stern, Daniel Fehder, Ron Ginor, Dominic Vollmar, Edward T. A. Fry and Mark J. Pirwitz
Background. A meta-analysis of trials in endovascular therapy suggested an increased mortality associated with treatment exposure to paclitaxel. Multiple publications and corrections of prior data were performed, and the United States Food and Drug Administration has...
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Monteleone, Peter P., Subhash Banerjee, Priya Kothapalli, Ariel Dora Stern, Daniel Fehder, Ron Ginor, Dominic Vollmar, Edward T. A. Fry, and Mark J. Pirwitz. "The Market Reacts Quickly: Changes in Paclitaxel Vascular Device Purchasing Within the Ascension Healthcare System." Journal of Invasive Cardiology 32, no. 1 (January 2020).
- May 2011
- Article
Race at the Top: How Companies Shape the Inclusion of African Americans on Their Boards in Response to Institutional Pressures
By: Clayton S. Rose and William T. Bielby
Drawing on institutionalist theory, we conceptualize the racial composition of the boards of directors of large American companies as shaped in response to social and political norms. We use new longitudinal and cross-sectional data to test hypotheses about factors...
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Keywords:
Leadership;
Governing and Advisory Boards;
Race;
Mathematical Methods;
Government and Politics;
Public Ownership;
United States
Rose, Clayton S., and William T. Bielby. "Race at the Top: How Companies Shape the Inclusion of African Americans on Their Boards in Response to Institutional Pressures." Social Science Research 40, no. 3 (May 2011): 841–859.
- March 2006 (Revised August 2006)
- Case
Putnam Investments: Rebuilding the Culture
By: Nitin Nohria and Charles Nichols
Charles "Ed" Haldeman Jr. is promoted CEO of Putnam Investments after the firm was badly damaged by a series of improper trading practices. He is charged with the task of managing the crisis, repairing the company culture, and putting the firm back into a pattern of...
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Keywords:
Crime and Corruption;
Organizational Culture;
Organizational Change and Adaptation;
Ethics;
Investment Funds;
Investment;
Leading Change;
Decision Choices and Conditions;
Financial Services Industry;
United States
Nohria, Nitin, and Charles Nichols. "Putnam Investments: Rebuilding the Culture." Harvard Business School Case 406-009, March 2006. (Revised August 2006.)
- August 2015
- Article
Poultry in Motion: A Study of International Trade Finance Practices
By: Pol Antràs and C. Fritz Foley
This paper analyzes the financing terms that support international trade and sheds light on how these terms shape the impact of economic shocks on trade. Analysis of transaction-level data from a U.S.-based exporter of frozen and refrigerated food products, primarily...
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Antràs, Pol, and C. Fritz Foley. "Poultry in Motion: A Study of International Trade Finance Practices." Journal of Political Economy 123, no. 4 (August 2015): 853–901. (Revised May 2014. Online Appendix.)
- Article
Memory and Representativeness
By: Pedro Bordalo, Katherine Baldiga Coffman, Nicola Gennaioli, Frederik Schwerter and Andrei Shleifer
We explore the idea that judgment by representativeness reflects the workings of episodic memory, especially interference. In a new laboratory experiment on cued recall, participants are shown two groups of images with different distributions of colors. We find that i)...
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Bordalo, Pedro, Katherine Baldiga Coffman, Nicola Gennaioli, Frederik Schwerter, and Andrei Shleifer. "Memory and Representativeness." Psychological Review 128, no. 1 (January 2021): 71–85.
- July 2021
- Article
Availability and Nutrient Composition of Vegetarian Items at U.S. Fast-Food Restaurants
By: Caroline G. Dunn, Mark J. Soto, Sophia V. Hua, Elizabeth A. Keenan, Lindsay M. Jaacks, Julia A. Wolfson and Sara N. Bleich
Research Questions: What are patterns in availability of vegetarian items in U.S. fast-food chains (2012 to 2018) and are there differences in nutrient composition between and within vegetarian and nonvegetarian items annually and over time?
Key Findings: In this... View Details
Key Findings: In this... View Details
Keywords:
Fast Food;
Restaurants;
Vegetarian;
Consumer Health;
Sodium;
Food;
Nutrition;
Health;
Food and Beverage Industry;
United States
Dunn, Caroline G., Mark J. Soto, Sophia V. Hua, Elizabeth A. Keenan, Lindsay M. Jaacks, Julia A. Wolfson, and Sara N. Bleich. "Availability and Nutrient Composition of Vegetarian Items at U.S. Fast-Food Restaurants." Journal of the Academy of Nutrition and Dietetics 121, no. 7 (July 2021): 1306–1311.