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- All HBS Web
(488)
- People (1)
- News (93)
- Research (318)
- Events (2)
- Multimedia (7)
- Faculty Publications (154)
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- October 1999 (Revised January 2000)
- Case
Weight Watchers Mexico
By: David J. Arnold, Myra M. Hart and Susan Harmeling
Weight Watchers must decide how to react to the Mexican financial crisis. Options include exiting, reducing investment, or continuing previous operations. View Details
Keywords: Business Exit or Shutdown; Restructuring; Volatility; Economy; Investment; Marketing; Problems and Challenges; Mexico
Arnold, David J., Myra M. Hart, and Susan Harmeling. "Weight Watchers Mexico." Harvard Business School Case 500-010, October 1999. (Revised January 2000.)
- November 2012
- Article
Empirical Observations on Longer-term Use of Incentives for Weight Loss
By: Leslie K. John, George Loewenstein and Kevin Volpp
Behavioral economic-based interventions are emerging as powerful tools to help individuals accomplish their own goals, including weight loss. Deposit contract incentive systems give participants the opportunity to put their money down toward losing weight, which they... View Details
Keywords: Weight Loss; Obesity; Behavioral Economics; Intervention; Behavior; Motivation and Incentives
John, Leslie K., George Loewenstein, and Kevin Volpp. "Empirical Observations on Longer-term Use of Incentives for Weight Loss." Preventive Medicine 55, Supplement 1 (November 2012): S68–S74.
- March 2024 (Revised July 2024)
- Case
WeightWatchers: Promoting Weight Health
In December 2023, the 60-year-old weight management industry stalwart WeightWatchers announced the launch of WeightWatchers Clinic, which incorporated GLP-1s , a new class of prescription weight-loss medications, into the company’s portfolio of products and mobile app... View Details
Keywords: Business Strategy; Competitive Strategy; Resource Allocation; Diversification; Leadership; Growth and Development Strategy; Technology Industry; Health Industry; Pharmaceutical Industry; United States; New York (city, NY)
Gulati, Ranjay, Cynthia A. Montgomery, Ashley Whillans, Allison Ciechanover, and Emily Grandjean. "WeightWatchers: Promoting Weight Health." Harvard Business School Case 424-029, March 2024. (Revised July 2024.)
- January 2018
- Article
The Effect of Cost Sharing on an Employee Weight Loss Program: A Randomized Trial
By: Leslie K. John, Andrea Troxel, William Yancy, Joelle Y. Friedman, Jingsan Zhu, Lin Yang, Robert Galvin, Karen Miller-Kovach, Scott Halpern, George Loewenstein and Kevin Volpp
Purpose: We tested the effects of employer subsidies on employee enrollment, attendance, and weight loss in a nationally-available weight management program.
Design: A randomized trial tested the impact of employer subsidy: 100%; 80% 50% and a hybrid 50% subsidy... View Details
Design: A randomized trial tested the impact of employer subsidy: 100%; 80% 50% and a hybrid 50% subsidy... View Details
Keywords: Affordable Care Act (ACA); Subsidies; Weight Loss; Obesity; Incentives; Behavioral Economics; Motivation and Incentives; Behavior; Health Disorders; Health Care and Treatment; Compensation and Benefits; United States
John, Leslie K., Andrea Troxel, William Yancy, Joelle Y. Friedman, Jingsan Zhu, Lin Yang, Robert Galvin, Karen Miller-Kovach, Scott Halpern, George Loewenstein, and Kevin Volpp. "The Effect of Cost Sharing on an Employee Weight Loss Program: A Randomized Trial." American Journal of Health Promotion 32, no. 1 (January 2018): 170–176.
- 07 Oct 2019
- News
Weighting accounts for impact
- 26 Sep 2021
- News
Kominers’s Conundrums: Weight Weight… Don’t Tell Me!
- 17 Mar 2023
- Video
Body Weight Tabata with Arnold
- 2013
- Chapter
Weighted Generating Functions for Type II Lattices and Codes
By: Noam D. Elkies and Scott Duke Kominers
We give a new structural development of harmonic polynomials on Hamming space, and harmonic weight enumerators of binary linear codes, that parallels one approach to harmonic polynomials on Euclidean space and weighted theta functions of Euclidean lattices. Namely, we... View Details
Keywords: Mathematical Methods
Elkies, Noam D., and Scott Duke Kominers. "Weighted Generating Functions for Type II Lattices and Codes." In Quadratic and Higher Degree Forms. Vol. 31, edited by Alladi Krishnaswami, Manjul Bhargava, David Savitt, and Pham Huu Tiep, 63–108. Developments in Mathematics. Springer, 2013.
- 26 Oct 2011
- News
The Hartford Brothers’ A&P Gained Weight
- 2019
- Article
Configurations of Extremal Type II Codes via Harmonic Weight Enumerators
By: Noam D. Elkies and Scott Duke Kominers
We prove configuration results for extremal Type II codes, analogous to the configuration results of Ozeki and of the second author for extremal Type II lattices. Specifically, we show that for n ∈{8,24,32,48,56,72,96} every extremal Type II code of length n is... View Details
Keywords: Mathematical Methods
Elkies, Noam D., and Scott Duke Kominers. "Configurations of Extremal Type II Codes via Harmonic Weight Enumerators." Journal de Théorie des Nombres de Bordeaux 31, no. 3 (2019): 679–688.
- July 2010
- Case
Metabical: Positioning and Communications Strategy for a New Weight Loss Drug
By: John A. Quelch and Heather Beckham
Cambridge Sciences Pharmaceuticals (CSP) expects final approval for its revolutionary weight loss drug, Metabical. Metabical will be the only weight loss drug with FDA approval that is also clinically proven to be effective for moderately overweight people. Barbara... View Details
Keywords: Product Positioning; Marketing Communications; Product Launch; Consumer Behavior; Pharmaceutical Industry; United States
Quelch, John A., and Heather Beckham. "Metabical: Positioning and Communications Strategy for a New Weight Loss Drug." Harvard Business School Brief Case 104-240, July 2010.
- 13 Feb 2013
- Research & Ideas
5 Weight Loss Tips From Behavioral Economists
day. If participants reached their weight loss goal by the end of the trial, they got to keep the money, thus doubling their deposits. But if they failed to reach the goal, they lost all the cash. Meanwhile, a control group of... View Details
Keywords: by Carmen Nobel
Getting the Most Out of Financial Incentives for Weight Loss
The use of employer-sponsored, incentive-based programs for weight loss is growing. This growth is likely to accelerate in the coming years due to a provision in the Patient Protection and Affordable Care Act, which allows employers to use a greater proportion of... View Details
- Forthcoming
- Article
Human-Algorithm Collaboration with Private Information: Naïve Advice Weighting Behavior and Mitigation
By: Maya Balakrishnan, Kris Ferreira and Jordan Tong
Even if algorithms make better predictions than humans on average, humans may sometimes have private information which an algorithm does not have access to that can improve performance. How can we help humans effectively use and adjust recommendations made by... View Details
Keywords: AI and Machine Learning; Analytics and Data Science; Forecasting and Prediction; Digital Marketing
Balakrishnan, Maya, Kris Ferreira, and Jordan Tong. "Human-Algorithm Collaboration with Private Information: Naïve Advice Weighting Behavior and Mitigation." Management Science (forthcoming).
- Research Summary
Optimal Heteroskedasticity Autocorrelation Consistent Covariance Estimators for GMM Weighting Matrices
This paper considers the optimal bias-variance tradeoff for estimators of the long run covariance matrix used to generate GMM weighting matrices in time series contexts. Minimum MSE HAC estimators do not yield minimum MSE GMM estimators. Instead, achieving... View Details
- May 2008
- Article
Excess Comovement of Stock Returns: Evidence from Cross-sectional Variation in Nikkei 225 Weights
By: Robin Greenwood
In the presence of limits to arbitrage, cross-sectional variation in periodic investor demand should be related to the degree of comovement of returns. I exploit the unusual weighting system of the Nikkei 225 index in Japan to identify cross-sectional variation in... View Details
Keywords: Stocks; Investment; Investment Return; Market Transactions; Weight; Performance Expectations; Behavior; Japan
Greenwood, Robin. "Excess Comovement of Stock Returns: Evidence from Cross-sectional Variation in Nikkei 225 Weights." Review of Financial Studies 21, no. 3 (May 2008): 1153–1186.
- 30 Jan 2013
- News