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      • August 2019
      • Article

      When and How to Diversify—A Multicategory Utility Model for Personalized Content Recommendation

      By: Yicheng Song, Nachiketa Sahoo and Elie Ofek
      Sometimes we desire change, a break from the same or an opportunity to fulfill different aspects of our needs. Noting that consumers seek variety, several approaches have been developed to diversify items recommended by personalized recommender systems. However,... View Details
      Keywords: Recommender Systems; Personalization; Recommendation Diversity; Variety Seeking; Collaborative Filtering; Consumer Utility Models; Digital Media; Clickstream Analysis; Learning-to-rank; Consumer Behavior; Media; Customization and Personalization; Strategy; Mathematical Methods
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      Song, Yicheng, Nachiketa Sahoo, and Elie Ofek. "When and How to Diversify—A Multicategory Utility Model for Personalized Content Recommendation." Management Science 65, no. 8 (August 2019): 3737–3757.
      • May 28, 2019
      • Other Article

      How Russia Found a Disinformation Haven in America

      By: Rawi Abdelal and Galit Goldstein
      The Mueller Report established that “the Russians” undertook information operations campaigns to meddle in the 2016 U.S. presidential election. Though this has been clear for a long time, Americans continue to discuss Russian information operations in the wrong way.... View Details
      Keywords: Elections; Donald Trump; Political Elections; National Security; Information Technology; Governing Rules, Regulations, and Reforms; Social Media; Russia; United States
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      Abdelal, Rawi, and Galit Goldstein. "How Russia Found a Disinformation Haven in America." National Interest (May 28, 2019).
      • February 2019
      • Case

      Halliday's OASIS

      By: Scott Duke Kominers and Nicole Tempest Keller
      Wade Watts has won control of the OASIS – a futuristic, immersive virtual reality game world. He must decide on rules, rights, and marketplace design, balancing the founding principles of the OASIS with the platform’s potentially negative externalities. View Details
      Keywords: Managing Markets; Corporate Responsibility; Virtual Reality; Digital Platforms; Management; Corporate Social Responsibility and Impact; Social Media; United States
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      Kominers, Scott Duke, and Nicole Tempest Keller. "Halliday's OASIS." Harvard Business School Case 819-106, February 2019.
      • January 2019 (Revised February 2024)
      • Teaching Note

      Hubble Contact Lenses: Data Driven Direct-to-Consumer Marketing

      By: Ayelet Israeli
      Teaching Note for HBS No. 519-011. As its Series A extension round approaches, the founders of Hubble, a subscription-based, social-media fueled, direct-to-consumer (DTC) brand of contact lenses, are reflecting on the marketing strategies that have taken them to a... View Details
      Keywords: DTC; Direct To Consumer Marketing; Health Care; Mobile; Attribution; Experimentation; Experiments; Churn/retention; Customer Lifetime Value; Internet Marketing; Big Data; Analytics; A/B Testing; CRM; Advertising; Marketing; Marketing Channels; Marketing Strategy; Media; Brands and Branding; Marketing Communications; Digital Marketing; Acquisition; Growth and Development Strategy; Customer Focus and Relationships; Consumer Behavior; Social Media; E-commerce
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      Israeli, Ayelet. "Hubble Contact Lenses: Data Driven Direct-to-Consumer Marketing." Harvard Business School Teaching Note 519-056, January 2019. (Revised February 2024.)
      • January 2019 (Revised October 2019)
      • Case

      Glossier: Co-Creating a Cult Brand with a Digital Community

      By: Jill Avery
      Glossier’s proclaimed strategy was “born from content; fueled by community.” The digital-first, direct-to-consumer beauty brand had experienced rapid growth, with sales up 600% in 2017 and a customer portfolio that grew by threefold. But, its founder, Emily Weiss, was... View Details
      Keywords: Brands; Brand Management; Brand Communication; Retailing; DTC; Influencer; Startup; Internet Marketing; Big Data; Crowdsourcing; Growth and Development Strategy; Social Media; E-commerce; Internet and the Web; Digital Marketing; Consumer Products Industry; Beauty and Cosmetics Industry; Retail Industry; United States; North America
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      Avery, Jill. "Glossier: Co-Creating a Cult Brand with a Digital Community." Harvard Business School Case 519-022, January 2019. (Revised October 2019.)
      • December 2018 (Revised February 2020)
      • Case

      Fishbowl: Scaling Up

      By: Leslie K. John
      Fishbowl is a social media app that allows professionals to connect with other relevant professionals both within their company and across industry. Unlike many other social media apps, on which users typically present idealized portraits of themselves, on Fishbowl,... View Details
      Keywords: Communication Technologies; Customer Value; Value Chain; Interpersonal Communication; Talent and Talent Management; Customer Value and Value Chain; Entrepreneurship; Business Model; Growth and Development Strategy; Marketing Strategy; Advertising; Product Marketing; Digital Platforms; Consumer Behavior; Network Effects; Emotions; Motivation and Incentives; Trust; Applications and Software; Technology Adoption; Social Media; Media and Broadcasting Industry; Media and Broadcasting Industry; Media and Broadcasting Industry; Media and Broadcasting Industry; Media and Broadcasting Industry; United States
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      John, Leslie K. "Fishbowl: Scaling Up." Harvard Business School Case 919-013, December 2018. (Revised February 2020.) (Email mking@hbs.edu for a courtesy copy.)
      • December 2018
      • Case

      Choosy

      By: Jeffrey J. Bussgang and Julia Kelley
      Founded in 2017, Choosy is a data-driven fashion startup that uses algorithms to identify styles trending on social media. After manufacturing similar items using a China-based supply chain, Choosy sells them to consumers through its website and social media pages.... View Details
      Keywords: Artificial Intelligence; Algorithms; Machine Learning; Neural Networks; Instagram; Influencer; Fast Fashion; Design; Customer Satisfaction; Customer Focus and Relationships; Decision Making; Cost vs Benefits; Innovation and Invention; Brands and Branding; Product Positioning; Demand and Consumers; Supply Chain; Production; Logistics; Business Model; Expansion; Internet and the Web; Mobile and Wireless Technology; Digital Platforms; Social Media; Technology Industry; Fashion Industry; North and Central America; United States; New York (state, US); New York (city, NY)
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      Bussgang, Jeffrey J., and Julia Kelley. "Choosy." Harvard Business School Case 819-054, December 2018.
      • December 2018 (Revised September 2019)
      • Case

      Brand Activism: Nike and Colin Kaepernick

      By: Jill Avery and Koen Pauwels
      Nike's selection of politically polarizing Colin Kaepernick as the spokesperson for the 30th anniversary of its iconic "Just Do It" campaign catapulted the brand into the media spotlight and made it a political flashpoint for consumers across America. Would the choice... View Details
      Keywords: Digital Marketing; Entertainment; Politics; Activism; Brand Equity; Marketing; Marketing Strategy; Brands and Branding; Marketing Communications; Sports; Advertising; Social Media; Apparel and Accessories Industry; Sports Industry; Consumer Products Industry; United States; North America
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      Avery, Jill, and Koen Pauwels. "Brand Activism: Nike and Colin Kaepernick." Harvard Business School Case 519-046, December 2018. (Revised September 2019.)
      • December 2018
      • Case

      CIR Group: Passing Wealth through the Generations

      By: Lauren Cohen, Christopher J. Malloy and Elena Corsi
      Rodolfo, Marco, and Edoardo De Benedetti had received from their father his controlling shares in COFIDE, a publicly listed holding company that held 45.8% of CIR Group, another publicly listed holding. The latter held majority shares in GEDI, Italy’s largest print... View Details
      Keywords: Succession Planning; Transferring Shares; Wealth Management; Holding Structures; Family Ownership; Ownership Stake; Management Succession; Governing and Advisory Boards; Policy; Media and Broadcasting Industry; Media and Broadcasting Industry; Italy
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      Cohen, Lauren, Christopher J. Malloy, and Elena Corsi. "CIR Group: Passing Wealth through the Generations." Harvard Business School Case 219-060, December 2018.
      • November 2018 (Revised August 2020)
      • Case

      The Reinvention of Kodak

      By: Ryan Raffaelli and Christine Snively
      The Eastman Kodak Company (Kodak) was a name familiar to most Americans. The company had dominated the film and photography industry through most of the 20th Century and was known for making affordable cameras (and the “Kodak Moment”) and supplying the movie industry... View Details
      Keywords: CEO; Leadership; Asset Management; Transformation; Organizational Change and Adaptation; Competitive Strategy
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      Raffaelli, Ryan, and Christine Snively. "The Reinvention of Kodak." Harvard Business School Case 419-012, November 2018. (Revised August 2020.)
      • November 2018 (Revised February 2019)
      • Teaching Plan

      Gimlet Media: A Podcasting Startup

      By: John Deighton and Leora Kornfeld
      When digital distribution becomes an option for an analog industry, the effects on the incumbents can be devastating. Is podcasting the beginning of the end of radio? Can it do what streaming video did to television and websites did to print? Two former public radio... View Details
      Keywords: Platforms And Ecosystems; Startup; Creative Industries; Digital Marketing; Podcasting; Business Startups; Media; Entertainment; Growth and Development Strategy; Digital Platforms; United States
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      Deighton, John, and Leora Kornfeld. "Gimlet Media: A Podcasting Startup." Harvard Business School Teaching Plan 919-405, November 2018. (Revised February 2019.)
      • August 2018 (Revised April 2023)
      • Case

      Facebook—Can Ethics Scale in the Digital Age?

      By: George A. Riedel and Carin-Isabel Knoop
      Since its founding in 2004, Facebook has built a phenomenally successful business at global scale to become the fifth most valuable public company in the world. The revelation of Cambridge Analytica events in March 2018, where 78 million users' information was leaked... View Details
      Keywords: Facebook; Ethics; Corporate Social Responsibility and Impact; Business and Stakeholder Relations; Trust; Business Model; Corporate Accountability; Social Media
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      Riedel, George A., and Carin-Isabel Knoop. "Facebook—Can Ethics Scale in the Digital Age?" Harvard Business School Case 319-030, August 2018. (Revised April 2023.)
      • August 2018 (Revised February 2023)
      • Case

      Hubble Contact Lenses: Data Driven Direct-to-Consumer Marketing

      By: Jill Avery and Ayelet Israeli
      As its Series A extension round approaches, the founders of Hubble, a subscription-based, social-media fueled, direct-to-consumer (DTC) brand of contact lenses, are reflecting on the marketing strategies that have taken them to a valuation of $200 million and debating... View Details
      Keywords: DTC; Direct To Consumer Marketing; Health Care; Mobile; Attribution; Experimentation; Experiments; Churn/retention; Customer Lifetime Value; Internet Marketing; Big Data; Analytics; A/B Testing; CRM; Advertising; Marketing; Marketing Channels; Marketing Strategy; Media; Brands and Branding; Marketing Communications; Digital Marketing; Consumer Behavior; Acquisition; Growth and Development Strategy; Customer Focus and Relationships; Social Media; E-commerce; Analytics and Data Science; Health Industry; Consumer Products Industry; United States; North America; Europe
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      Avery, Jill, and Ayelet Israeli. "Hubble Contact Lenses: Data Driven Direct-to-Consumer Marketing." Harvard Business School Case 519-011, August 2018. (Revised February 2023.)
      • July 2018
      • Teaching Note

      Verizon 2018

      By: Rosabeth Moss Kanter and Jonathan Cohen
      Teaching Note for HBS No. 318-114. In 2018, CEO Lowell McAdam led efforts to transform Verizon through digital innovation, media acquisitions and integration, and changes to the company culture. He sought to manage change at the company as growth in traditional areas... View Details
      Keywords: Change; Change Leadership; Change Management; Innovation; Digital; Management; Leading Change; Innovation and Management; Acquisition; Integration; Organizational Culture; Media and Broadcasting Industry; Media and Broadcasting Industry; United States
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      Kanter, Rosabeth Moss, and Jonathan Cohen. "Verizon 2018." Harvard Business School Teaching Note 319-031, July 2018.
      • June 2018 (Revised October 2018)
      • Teaching Note

      Valuing Snap After the IPO Quiet Period (A), (B), and (C)

      By: Marco Di Maggio and Benjamin C. Esty
      Teaching Note for HBS Nos. 218-095, 218-096, and 218-116. View Details
      Keywords: Sell-side Analysts; Underwriters; Investment Banking; Social Network; Discounted Cash Flow; Cost Of Capital; Conflicts Of Interest; Corporate Governance; Advertising; Quiet Period; Business Startups; Digital Marketing; Initial Public Offering; Information Infrastructure; Valuation; Venture Capital; Forecasting and Prediction; Social Media; Advertising Industry; Entertainment and Recreation Industry; Web Services Industry; United States; California
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      Di Maggio, Marco, and Benjamin C. Esty. "Valuing Snap After the IPO Quiet Period (A), (B), and (C)." Harvard Business School Teaching Note 218-101, June 2018. (Revised October 2018.)
      • June 2018
      • Teaching Note

      Sandra Brown Goes Digital

      By: Rosabeth Moss Kanter and Jonathan Cohen
      As a middle manager at a biotechnology company, Sandra Brown harnessed digital tools and social media to engage others and build campaigns for change in the company. This Teaching Note presents strategies for teaching the Sandra Brown case series, which follows Brown's... View Details
      Keywords: Change Leadership; Change Management; Digital; Engagement; Stakeholder Engagement; Grassroots Movement; Health Care Industry; Career Path; Innovation; Leading Change; Management; Innovation and Management; Personal Development and Career; Organizational Change and Adaptation; Quality
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      Kanter, Rosabeth Moss, and Jonathan Cohen. "Sandra Brown Goes Digital." Harvard Business School Teaching Note 318-156, June 2018.
      • June 2018 (Revised January 2020)
      • Case

      Sony

      By: Stefan Thomke, Atsushi Osanai and Akiko Kanno
      Sony used to be synonymous with "innovation" and "cool products." The case reveals how the company lost its edge and describes the leadership initiatives to restore its former glory. In 2012, Kazuo (Kaz) Hirai becomes CEO and successfully transforms Sony, including a... View Details
      Keywords: Customer Experience; Product Differentiation; Transformation; Leadership Style; Technology Adoption; Leading Change; Media and Broadcasting Industry; Media and Broadcasting Industry; Media and Broadcasting Industry; Japan
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      Thomke, Stefan, Atsushi Osanai, and Akiko Kanno. "Sony." Harvard Business School Case 618-045, June 2018. (Revised January 2020.)
      • June 2018 (Revised April 2021)
      • Supplement

      Valuing Snap After the IPO Quiet Period

      By: Benjamin C. Esty, Marco Di Maggio and Greg Saldutte
      Keywords: Sell-side Analysts; Underwriters; Investment Banking; Social Network; Discounted Cash Flow; Cost Of Capital; Conflicts Of Interest; Corporate Governance; Advertising; Quiet Period; Business Startups; Digital Marketing; Initial Public Offering; Information Infrastructure; Valuation; Venture Capital; Forecasting and Prediction; Social Media; United States; California
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      Esty, Benjamin C., Marco Di Maggio, and Greg Saldutte. "Valuing Snap After the IPO Quiet Period." Harvard Business School Spreadsheet Supplement 218-726, June 2018. (Revised April 2021.)
      • June 2018 (Revised April 2021)
      • Case

      Valuing Snap After the IPO Quiet Period (A)

      By: Marco Di Maggio, Benjamin C. Esty and Gregory Saldutte
      Snap, the disappearing message app, went public at $17 per share on March 2, 2017, making its two 20-something founders the youngest self-made billionaires in the country. Over the next three weeks, 14 analysts made investment recommendations on Snap: two with buy... View Details
      Keywords: Sell-side Analysts; Underwriters; Investment Banking; Social Network; Discounted Cash Flow; Cost Of Capital; Conflicts Of Interest; Corporate Governance; Advertising; Quiet Period; "DCF Valuation,"; Business Startups; Digital Marketing; Initial Public Offering; Information Infrastructure; Valuation; Venture Capital; Forecasting and Prediction; Social Media; Advertising Industry; Entertainment and Recreation Industry; Web Services Industry; United States; California
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      Di Maggio, Marco, Benjamin C. Esty, and Gregory Saldutte. "Valuing Snap After the IPO Quiet Period (A)." Harvard Business School Case 218-095, June 2018. (Revised April 2021.)
      • June 2018
      • Supplement

      Valuing Snap After the IPO Quiet Period (B)

      By: Marco Di Maggio and Benjamin C. Esty
      Analyzes Snap’s value and analyst recommendations following the events described in the (A) case. View Details
      Keywords: Sell-side Analysts; Underwriters; Investment Banking; Social Network; Discounted Cash Flow; Cost Of Capital; Conflicts Of Interest; Corporate Governance; Advertising; Quiet Period; Business Startups; Digital Marketing; Initial Public Offering; Information Infrastructure; Valuation; Venture Capital; Forecasting and Prediction; Social Media; Advertising Industry; Entertainment and Recreation Industry; Web Services Industry; United States; California
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      Di Maggio, Marco, and Benjamin C. Esty. "Valuing Snap After the IPO Quiet Period (B)." Harvard Business School Supplement 218-096, June 2018.
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