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Show Results For
-
All HBS Web
(7,448)
- People (19)
- News (1,294)
- Research (5,100)
- Events (61)
- Multimedia (60)
- Faculty Publications (3,812)
- 2017
- Working Paper
Optimal Tilts: Combining Persistent Characteristic Portfolios
By: Malcolm Baker, Ryan Taliaferro and Terry Burnham
We examine the optimal weighting of four tilts in US equity markets from 1968 through 2014. We define a “tilt” as a characteristic-based portfolio strategy that requires relatively low annual turnover. This is a continuum, with small size, a very persistent...
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Baker, Malcolm, Ryan Taliaferro, and Terry Burnham. "Optimal Tilts: Combining Persistent Characteristic Portfolios." Working Paper, March 2017.
- 2013
- Working Paper
Where do the Most Active Customers Originate and How Can Firms Keep Them Engaged?
By: Clarence Lee, E. Ofek and Thomas Steenburgh
In this paper, we study how firms offering Web services can acquire and develop an active customer base. We focus on two basic questions. First, how does the method of customer acquisition affect the way customers use the service to meet their own needs and to interact...
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- Fourth Quarter 2017
- Article
Optimal Tilts: Combining Persistent Characteristic Portfolios
By: Malcolm Baker, Ryan Taliaferro and Terry Burnham
We examine the optimal weighting of four tilts in U.S. equity markets from 1968 through 2014. We define a “tilt” as a characteristic-based portfolio strategy that requires relatively low annual turnover. This is a continuum, with small size (a very persistent...
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Baker, Malcolm, Ryan Taliaferro, and Terry Burnham. "Optimal Tilts: Combining Persistent Characteristic Portfolios." Financial Analysts Journal 73, no. 4 (Fourth Quarter 2017): 75–89.
- Article
Multi-Echelon Inventory Management Under Short-Term Take-or-Pay Contracts
By: Joel Goh and Evan L. Porteus
We extend the Clark–Scarf serial multi-echelon inventory model to include procuring production inputs under short-term take-or-pay contracts at one or more stages. In each period, each such stage has the option to order/process at two different cost rates; the cheaper...
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Keywords:
Inventory Management;
Multi-echelon Inventory Theory;
Karush Lemma;
Clark-Scarf Model;
Convex Ordering Cost;
Advance Commitments;
Supply Chain
Goh, Joel, and Evan L. Porteus. "Multi-Echelon Inventory Management Under Short-Term Take-or-Pay Contracts." Production and Operations Management 25, no. 8 (August 2016): 1415–1429. (Finalist for 2014 POMS College of Supply Chain Management Student Paper Award.)
- September 2023
- Teaching Note
Apple’s iPhone Revolution: Pioneering the Circular Economy
By: George Serafeim
Teaching Note for HBS Case 123-089. The case describes the Trade-In system for iPhones that allow iPhones to be refurbished and reused or to be recycled. The case provides information for the students to analyze the financial attractiveness of the Trade-In system and...
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- December 2017 (Revised May 2018)
- Case
Amazon Buys Whole Foods
By: José B. Alvarez, David Lane and Joni Coughlin
The June 2017 news that e-commerce giant Amazon was paying $13.7 billion for organic supermarket chain Whole Foods precipitated a broad sell-off in the shares of grocery retailers and suppliers. Behind the precipitous declines lay recognition that Amazon’s bold move...
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Keywords:
Amazon;
Whole Foods;
Grocery;
Grocery Delivery;
Mergers & Acquisitions;
Business Models;
Food Value Chain;
Agribusiness;
Mergers and Acquisitions;
Operations;
Competitive Strategy;
E-commerce;
Agriculture and Agribusiness Industry;
Retail Industry;
Web Services Industry;
Food and Beverage Industry;
United States
Alvarez, José B., David Lane, and Joni Coughlin. "Amazon Buys Whole Foods." Harvard Business School Case 518-056, December 2017. (Revised May 2018.)
- July 2024
- Article
Chatbots and Mental Health: Insights into the Safety of Generative AI
By: Julian De Freitas, Ahmet Kaan Uğuralp, Zeliha Uğuralp and Stefano Puntoni
Chatbots are now able to engage in sophisticated conversations with consumers. Due to the ‘black box’ nature of the algorithms, it is impossible to predict in advance how these conversations will unfold. Behavioral research provides little insight into potential safety...
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Keywords:
Autonomy;
Chatbots;
New Technology;
Brand Crises;
Mental Health;
Large Language Model;
AI and Machine Learning;
Behavior;
Well-being;
Technological Innovation;
Ethics
De Freitas, Julian, Ahmet Kaan Uğuralp, Zeliha Uğuralp, and Stefano Puntoni. "Chatbots and Mental Health: Insights into the Safety of Generative AI." Journal of Consumer Psychology 34, no. 3 (July 2024): 481–491.
- Forthcoming
- Article
On the Representativeness of Voter Turnout
By: Louis Kaplow and Scott Duke Kominers
Prominent theory research on voting analyzes a variety of models in which expected pivotality drives voters' turnout decisions and hence determines voting outcomes. It is recognized, however, that such work is at odds with Downs's paradox: in practice, many...
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Keywords:
Voting Behavior;
Voting Turnout;
Paradox Of Voting;
Pivotality;
Elections;
Model;
Theory;
Governance Transparency;
Government;
Democracy;
Turnout;
Voting;
Governance;
Government and Politics;
Public Sector;
Political Elections
Kaplow, Louis, and Scott Duke Kominers. "On the Representativeness of Voter Turnout." Journal of Law & Economics (forthcoming).
- April 2020
- Article
Designs for Estimating the Treatment Effect in Networks with Interference
By: Ravi Jagadeesan, Natesh S. Pillai and Alexander Volfovsky
In this paper, we introduce new, easily implementable designs for drawing causal inference from randomized experiments on networks with interference. Inspired by the idea of matching in observational studies, we introduce the notion of considering a treatment...
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Keywords:
Experimental Design;
Network Inference;
Neyman Estimator;
Symmetric Interference Model;
Homophily
Jagadeesan, Ravi, Natesh S. Pillai, and Alexander Volfovsky. "Designs for Estimating the Treatment Effect in Networks with Interference." Annals of Statistics 48, no. 2 (April 2020): 679–712.
- May 2017 (Revised November 2019)
- Case
The Dubai International Film Festival
By: Rohit Deshpandé and Alpana Thapar
This case follows the conception and emergence of the Dubai International Film Festival (DIFF). In an already crowded and highly competitive industry, Abdulhamid Juma was attempting to define and establish a unique brand positioning for DIFF. Committed to its vision,...
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Keywords:
Brand Positioning;
Underdog Brand Building;
Business Models;
Non-profit;
Managing Multiple Stakeholders;
Film Entertainment;
Brands and Branding;
Business Model;
Competitive Strategy;
Decision Making;
Growth and Development Strategy;
Entertainment and Recreation Industry;
Motion Pictures and Video Industry
Deshpandé, Rohit, and Alpana Thapar. "The Dubai International Film Festival." Harvard Business School Case 517-110, May 2017. (Revised November 2019.)
- January 2017 (Revised October 2023)
- Case
Classtivity: Payal's Pirouette
By: Jeffrey J. Bussgang and Olivia Hull
A few months after launching a new fitness technology product, the small staff of New York startup Classtivity gathers on a Saturday in April 2013 to take stock. With one successful pivot under its belt, Classtivity is finally generating revenue and enthusiasm among...
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Keywords:
Product Pivot;
Boutique Fitness;
Fitness Industry;
Market Sizing;
Consumer Technology;
Bundling;
Subscription Model;
Two-sided Marketplace;
ClassPass;
Entrepreneurship;
Venture Capital;
Business Startups;
Transition;
Customer Focus and Relationships;
Technological Innovation;
Organizational Change and Adaptation;
Customer Value and Value Chain;
Marketing Strategy;
Failure;
Business Strategy;
Technology Industry;
Health Industry;
New York (city, NY)
Bussgang, Jeffrey J., and Olivia Hull. "Classtivity: Payal's Pirouette." Harvard Business School Case 817-002, January 2017. (Revised October 2023.)
- March–April 2014
- Article
The Low-Risk Anomaly: A Decomposition into Micro and Macro Effects
By: Malcolm Baker, Brendan Bradley and Ryan Taliaferro
Low beta stocks have offered a combination of low risk and high returns. We decompose the anomaly into micro and macro components. The micro component comes from the selection of low beta stocks. The macro component comes from the selection of low beta countries or...
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Keywords:
Low Volatility;
Beta;
Portfolio Construction;
Market Efficiency;
Capital Asset Pricing Model;
Asset Management
Baker, Malcolm, Brendan Bradley, and Ryan Taliaferro. "The Low-Risk Anomaly: A Decomposition into Micro and Macro Effects." Financial Analysts Journal 70, no. 2 (March–April 2014): 43–58.
- September 2021 (Revised December 2021)
- Case
STARZPLAY: Shooting for the Stars
By: Elie Ofek, Marco Bertini and Alpana Thapar
In mid-2021, Maaz Sheikh, cofounder and CEO of STARZPLAY, a Dubai-based subscription video on demand (SVOD) provider that catered to the Middle East and North Africa region, was wrestling with how to find the right balance between continued subscriber growth and...
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Keywords:
Pricing;
Growth;
Profitability;
Subscription Business;
Business Model Innovation;
Fintech;
Subscription;
Performance Measurement;
Promotions;
International Marketing;
Streaming;
Competition;
Marketing;
Price;
Strategy;
Entrepreneurship;
Performance;
Measurement and Metrics;
Business Model;
Media and Broadcasting Industry;
Middle East;
North Africa
Ofek, Elie, Marco Bertini, and Alpana Thapar. "STARZPLAY: Shooting for the Stars." Harvard Business School Case 522-005, September 2021. (Revised December 2021.)
- October 2022
- Case
Volt Lines: Leading a B2B Service Provider through a Crisis (A)
By: Navid Mojir and Gamze Yucaoglu
Volt Lines was a next-generation transportation service in Istanbul, Turkey. The company was trying to disrupt the traditional corporate transportation market by developing software that allowed it to offer subscription-based transportation. Under the subscription...
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Keywords:
Business To Business Marketing;
B2B Marketing;
B2B Pricing;
Subscription Model;
Crisis Marketing;
Startup;
Service Management;
Information Technology;
Transportation;
COVID-19 Pandemic;
Disruptive Innovation;
Digital Platforms;
Business Model;
Price;
Crisis Management;
Opportunities;
Transportation Industry;
Technology Industry;
Turkey
Mojir, Navid, and Gamze Yucaoglu. "Volt Lines: Leading a B2B Service Provider through a Crisis (A)." Harvard Business School Case 523-037, October 2022.
- 2021
- Working Paper
Time Dependence and Preference: Implications for Compensation Structure and Shift Scheduling
By: Doug J. Chung, Byungyeon Kim and Byoung G. Park
This study jointly examines agents’ time dependence—period effects within instantaneous utility—and time preference—behavior on discounting future utility. The study considers the start- and end-of-period effects for time dependence and exponential and hyperbolic...
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Keywords:
Time Preferences;
Present Bias;
Hyperbolic Discounting;
Compensation;
Dynamic Structural Models;
Identification;
Time Management;
Motivation and Incentives;
Behavior;
Performance;
Compensation and Benefits
Chung, Doug J., Byungyeon Kim, and Byoung G. Park. "Time Dependence and Preference: Implications for Compensation Structure and Shift Scheduling." Harvard Business School Working Paper, No. 21-121, April 2021.
- Teaching Interest
Transforming Customer Experiences - Executive Education
By: Ryan W. Buell
In today's fast-growing service sector, a new set of frameworks are required to build a robust and competitive service business. Transforming Customer Experiences draws upon the latest research and insights to equip senior managers with a new toolkit for leading...
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- October 2013
- Article
Ad Revenue and Content Commercialization: Evidence from Blogs
By: Monic Sun and Feng Zhu
Many scholars argue that when incentivized by ad revenue, content providers are more likely to tailor their content to attract "eyeballs," and as a result, popular content may be excessively supplied. We empirically test this prediction by taking advantage of the...
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Keywords:
Ad-sponsored Business Models;
Media Content;
Blog;
Revenue Sharing;
User-generated Content;
Platform-based Markets;
Blogs;
Business Model;
Digital Platforms;
Commercialization;
Digital Marketing
Sun, Monic, and Feng Zhu. "Ad Revenue and Content Commercialization: Evidence from Blogs." Management Science 59, no. 10 (October 2013): 2314–2331.
- June 2013 (Revised July 2013)
- Case
Blackstone Alternative Asset Management
By: Robin Greenwood, Luis M. Viceira and Jared Dourdeville
This case explores reasons for Blackstone Alternative Asset Management's (BAAM's) growth from 2007-2013, a time when the overall fund of hedge funds industry contracted substantially. Additionally, the case analyzes evolving business models and value propositions...
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Keywords:
Hedge Fund;
Fund Of Hedge Funds;
Hedge Fund Industry Growth;
Fund Of Hedge Funds Industry Growth;
Evolving Business Models;
Value Propositions In The Fund Of Hege Funds Industry;
Business Model;
Investment Funds;
Growth and Development Strategy;
Financial Services Industry;
United States
Greenwood, Robin, Luis M. Viceira, and Jared Dourdeville. "Blackstone Alternative Asset Management." Harvard Business School Case 213-129, June 2013. (Revised July 2013.)
- January 2016
- Case
Sentient Jet: The Uber of Private Jets
By: Anat Keinan and Sandrine Crener
Founded in 1999 in the Boston area, Sentient Jet had become a leading private aviation company in the United States. Its success was built on the introduction of a groundbreaking membership program that offered business travelers the flexibility and convenience of...
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Keywords:
Private Jets;
Private Aviation;
Luxury;
Luxury Service;
Uber;
Branding;
Growth Strategy;
Client Acquisition;
Innovative Business Model;
Disruptive Innovation;
Collaborative Consumption;
Disruption;
Disruptive Business Model;
Travel;
Reputation Management;
Sharing Economy;
Word Of Mouth;
Customer Engagement;
Aircraft;
Membership Programs;
Loyalty Program;
Brand Positioning;
Brand Building;
Brand Differentiation;
Customer Service;
Exceeding Consumer Expectations;
2-way Business Model;
Marketing Partnerships;
Netjet;
Air Transportation;
Entrepreneurship;
Growth and Development Strategy;
Air Transportation Industry
Keinan, Anat, and Sandrine Crener. "Sentient Jet: The Uber of Private Jets." Harvard Business School Case 516-066, January 2016.
- 2020
- Working Paper
Internal Models, Make Believe Prices, and Bond Market Cornering
By: Ishita Sen and Varun Sharma
Exploiting position-level heterogeneity in regulatory incentives to misreport and novel data on regulators, we document that U.S. life insurers inflate the values of corporate bonds using internal models. We estimate an additional $9-$18 billion decline in regulatory...
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Keywords:
Life Insurers;
Capital Regulation;
Internal Models;
Corporate Bonds;
Regulatory Supervision;
Concentrated Ownership;
Bonds;
Capital;
Governing Rules, Regulations, and Reforms;
Insurance;
Investment Portfolio
Sen, Ishita, and Varun Sharma. "Internal Models, Make Believe Prices, and Bond Market Cornering." Working Paper, June 2020.