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  • March 2022 (Revised January 2025)
  • Technical Note

Statistical Inference

By: Iavor I. Bojinov, Michael Parzen and Paul Hamilton
This note provides an overview of statistical inference for an introductory data science course. First, the note discusses samples and populations. Next the note describes how to calculate confidence intervals for means and proportions. Then it walks through the logic... View Details
Keywords: Data Science; Statistics; Mathematical Modeling; Mathematical Methods; Analytics and Data Science
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Bojinov, Iavor I., Michael Parzen, and Paul Hamilton. "Statistical Inference." Harvard Business School Technical Note 622-099, March 2022. (Revised January 2025.)
  • 2018
  • Working Paper

Ratcheting, Competition, and the Diffusion of Technological Change: The Case of Televisions Under an Energy Efficiency Program

By: Tomomichi Amano and Hiroshi Ohashi
In differentiated goods markets with societal implications, quality standards are commonly implemented to avoid the under-provision of innovation. Firms have clear incentives to engage in strategic behavior because policymakers use market outcomes as a benchmark in... View Details
Keywords: Product Differentiation; Energy Efficiency Standards; Ratcheting; Diffusion Of Innovation; Technological Innovation; Competition; Quality; Governing Rules, Regulations, and Reforms; Policy
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Amano, Tomomichi, and Hiroshi Ohashi. "Ratcheting, Competition, and the Diffusion of Technological Change: The Case of Televisions Under an Energy Efficiency Program." Harvard Business School Working Paper, No. 19-021, September 2018.
  • 12 Oct 1999
  • Research & Ideas

Media Metamorphosis: Advertising in the Technology Age

how are they likely to shape the future for media competitors, advertisers, and their agencies? HBS professor Alvin Silk has long studied such issues, and his latest findings,... View Details
Keywords: by Peter K. Jacobs; Advertising
  • 01 Nov 2016
  • Working Paper Summaries

Patent Disclosures and Standard-Setting

Keywords: by Josh Lerner, Haris Tabakovic, and Jean Tirole
  • 2022
  • Book

The Role of Innovation and Entrepreneurship in Economic Growth

By: Michael J. Andrews, Aaron Chatterji, Josh Lerner and Scott Stern
We live in an era in which innovation and entrepreneurship seem ubiquitous, particularly in regions like Silicon Valley, Boston, and the Research Triangle Park. But many metrics of economic growth, such as productivity growth and business dynamism, have been at best... View Details
Keywords: Productivity Growth; Production Technologies; Innovation and Invention; Entrepreneurship; Economic Growth; Competition; Organizational Design; Economic Slowdown and Stagnation
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Andrews, Michael J., Aaron Chatterji, Josh Lerner, and Scott Stern, eds. The Role of Innovation and Entrepreneurship in Economic Growth. Chicago: University of Chicago Press, 2022.
  • 2007
  • Working Paper

I'll Have the Ice Cream Soon and the Vegetables Later: A Study of Online Grocery Purchases and Order Lead Time

By: Katherine L. Milkman, Todd Rogers and Max H. Bazerman
How do decisions made for tomorrow or two days in the future differ from decisions made for several days in the future? We use data from an online grocer to address this question. In general, we find that as the delay between order completion and delivery increases,... View Details
Keywords: Internet and the Web; Food; Decision Choices and Conditions; Conflict and Resolution; Emotions; Cognition and Thinking; Food and Beverage Industry; Food and Beverage Industry
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Milkman, Katherine L., Todd Rogers, and Max H. Bazerman. "I'll Have the Ice Cream Soon and the Vegetables Later: A Study of Online Grocery Purchases and Order Lead Time." Harvard Business School Working Paper, No. 07-078, April 2007. (Revised December 2007, May 2008, September 2008.)
  • March 2010
  • Article

I'll Have the Ice Cream Soon and the Vegetables Later: A Study of Online Grocery Purchases and Order Lead Time

By: Katherine L. Milkman, Todd Rogers and Max Bazerman
How do decisions made for tomorrow or two days in the future differ from decisions made for several days in the future? We use data from an online grocer to address this question. In general, we find that as the delay between order completion and delivery increases,... View Details
Keywords: Time Management; Service Delivery; Internet and the Web; Decisions; Customers; Retail Industry
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Milkman, Katherine L., Todd Rogers, and Max Bazerman. "I'll Have the Ice Cream Soon and the Vegetables Later: A Study of Online Grocery Purchases and Order Lead Time." Marketing Letters 21, no. 1 (March 2010): 17–35.
  • Article

What to Know About Locating in a Cluster

By: Willy C. Shih and Sen Chai
As a study of two industry clusters in Denmark shows, factors that can make clusters attractive—easy people movement and knowledge spillovers—can also make it harder for individual companies to retain proprietary knowledge. View Details
Keywords: Clusters; Clustering; Competitiveness; Life Sciences; Telecommunications; Science-based; Research And Development; Industry Clusters; Research; Innovation Strategy; Innovation and Management; Geographic Location; Food and Beverage Industry; Food and Beverage Industry; Food and Beverage Industry; Food and Beverage Industry; Denmark
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Shih, Willy C., and Sen Chai. "What to Know About Locating in a Cluster." Art. 57117. MIT Sloan Management Review 57, no. 1 (Fall 2015): 104–107.
  • July 2019
  • Article

Using Behavioral Science to Inform the Design of Sugary Drink Portion Limit Policies: Reply to Wilson and Stolarz-Fantino (2018)

By: Leslie John, Grant E. Donnelly and Christina A. Roberto
In their commentary, Wilson & Stolarz-Fantino argue that specific design features of our research mean that it cannot have policy implications and that researchers “need to consider profit maximization in menu design or studies are likely to suggest ill-informed... View Details
Keywords: Policy Implementation; Food; Governing Rules, Regulations, and Reforms; Policy
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John, Leslie, Grant E. Donnelly, and Christina A. Roberto. "Using Behavioral Science to Inform the Design of Sugary Drink Portion Limit Policies: Reply to Wilson and Stolarz-Fantino (2018)." Psychological Science 30, no. 7 (July 2019): 1103–1105.
  • 15 Apr 2014
  • News

Bertarelli Foundation Gift Names Deans' Health & Life Sciences Challenge Prize

with his family. One of the businesses of which Waypoint is comprised is Gurnet Point Capital, a health care and life sciences fund recently established and based in Boston. In... View Details
Keywords: i-Lab; Harvard Medical School; Scientific Research and Development Services
  • 19 Oct 2016
  • News

Science shows Wikipedia is the best part of the Internet

  • Article

Paradise Lost (and Restored?): A Study of Psychological Safety over Time

By: Derrick P. Bransby, Michaela Kerrissey and Amy C. Edmondson
Although prior research indicates that psychological safety can fluctuate, questions about when and why remain. To gain insights into the emergence and temporal dynamics of psychological safety, we explored longitudinal data representing more than 10,000 health care... View Details
Keywords: Analytics and Data Science; Research; Attitudes; Working Conditions; Well-being; Health Industry
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Bransby, Derrick P., Michaela Kerrissey, and Amy C. Edmondson. "Paradise Lost (and Restored?): A Study of Psychological Safety over Time." Academy of Management Discoveries (in press). (Pre-published online March 14, 2024.)
  • 09 May 2018
  • News

You Can’t Handle The Truth About Facebook Ads, New Harvard Study Shows

  • 2019
  • Article

An Empirical Study of Rich Subgroup Fairness for Machine Learning

By: Michael J Kearns, Seth Neel, Aaron Leon Roth and Zhiwei Steven Wu
Kearns et al. [2018] recently proposed a notion of rich subgroup fairness intended to bridge the gap between statistical and individual notions of fairness. Rich subgroup fairness picks a statistical fairness constraint (say, equalizing false positive rates across... View Details
Keywords: Machine Learning; Fairness; AI and Machine Learning
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Kearns, Michael J., Seth Neel, Aaron Leon Roth, and Zhiwei Steven Wu. "An Empirical Study of Rich Subgroup Fairness for Machine Learning." Proceedings of the Conference on Fairness, Accountability, and Transparency (2019): 100–109.
  • September 2013 (Revised November 2015)
  • Case

Living Proof: Are We a Technology Company or a Beauty Company?

By: Willy Shih

Jon Flint came up with the idea of a science-based beauty company while talking with his hairdresser about the problems with typical hair and skin care products. Together with a small team that included Professor Robert Langer of MIT, he committed to assemble a team... View Details

Keywords: Hair Care; Personal Care; Science-based; R&D; Innovation and Invention; Innovation and Management; Innovation Leadership; Innovation Strategy; Technological Innovation; Marketing; Marketing Strategy; Product Marketing; Product Positioning; Science-Based Business; Business Strategy; Commercialization; Corporate Strategy; Technology Platform; Expansion; Beauty and Cosmetics Industry; United States; Boston; Cambridge
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Shih, Willy. "Living Proof: Are We a Technology Company or a Beauty Company?" Harvard Business School Case 614-013, September 2013. (Revised November 2015.)

    The Value of Descriptive Analytics: Evidence from Online Retailers - Marketing Science

    Does the adoption of descriptive analytics impact online retailer performance, and if so, how? We use the synthetic difference-in-differences method to analyze the staggered adoption of a retail analytics dashboard by more than 1,500 e-commerce websites, and we... View Details
    • July 2013
    • Article

    Ethnic Innovation and U.S. Multinational Firm Activity

    By: C. Fritz Foley and William R. Kerr
    This paper studies the impact that immigrant innovators have on the global activities of U.S. firms by analyzing detailed data on patent applications and on the operations of the foreign affiliates of U.S. multinational firms. The results indicate that increases in the... View Details
    Keywords: Technology Transfer; Innovation; Ethnic Networks; Patents; Diasporas; Ethnicity; Multinational Firms and Management; Competitive Advantage; Research and Development; Foreign Direct Investment; Innovation and Invention; United States
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    Foley, C. Fritz, and William R. Kerr. "Ethnic Innovation and U.S. Multinational Firm Activity." Management Science 59, no. 7 (July 2013): 1529–1544.
    • 2019
    • Working Paper

    Using Technology to Augment Professionals, Instead of Replacing Them, for Innovative Problem Solving

    By: Hila Lifshitz - Assaf, Felicia Ng, Aniket Kittur and Robert Kraut
    While in some technological and scientific areas innovation is flourishing, in others it is stalling, leaving important problems unsolved for decades. One explanation is professionals’ limitations as problem solvers, as accumulating depth of knowledge enhances one’s... View Details
    Keywords: Innovation; Expertise; Future Of Work; Crowdsourcing; Artificial Intelligence; Problem Solving; Professionalism; Experience and Expertise; Collaborative Innovation and Invention; Problems and Challenges; Research and Development
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    Lifshitz - Assaf, Hila, Felicia Ng, Aniket Kittur, and Robert Kraut. "Using Technology to Augment Professionals, Instead of Replacing Them, for Innovative Problem Solving." Working Paper, March 2019.
    • July 2019
    • Teaching Note

    AT&T, Retraining, and the Workforce of Tomorrow

    By: William R. Kerr and Carl Kreitzberg
    A Teaching Note for the "AT&T, Retraining, and the Workforce of Tomorrow" case study (HBS#820-017). The case describes how AT&T designed and implemented a program to retrain 100,000 of its workers. The case first reviews the technological forces that compelled AT&T to... View Details
    Keywords: AT&T; Workforce; Future Of Work; Telecommunications; Unions; Technological Change; Layoffs; MOOCS; Strategic Planning; Employees; Training; Labor; Learning; Labor Unions; Technology Adoption; Talent and Talent Management; Transformation; Telecommunications Industry; Communications Industry; United States
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    Kerr, William R., and Carl Kreitzberg. "AT&T, Retraining, and the Workforce of Tomorrow." Harvard Business School Teaching Note 820-018, July 2019.
    • April 2023
    • Technical Note

    An Art & A Science: How to Apply Design Thinking to Data Science Challenges

    By: Michael Parzen, Eddie Lin, Douglas Ng and Jessie Li
    We hear it all the time as managers: “what is the data that backs up your decisions?” Even local mom-and-pop shops now have access to complex point-of-sale systems that can closely track sales and customer data. Social media influencers have turned into seven-figure... View Details
    Keywords: Decision Making; Framework; Analytics and Data Science
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    Parzen, Michael, Eddie Lin, Douglas Ng, and Jessie Li. "An Art & A Science: How to Apply Design Thinking to Data Science Challenges." Harvard Business School Technical Note 623-070, April 2023.
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