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  • All HBS Web  (4,349)
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  • All HBS Web  (4,349)
    • People  (7)
    • News  (1,032)
    • Research  (2,238)
    • Events  (58)
    • Multimedia  (99)
  • Faculty Publications  (1,789)
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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
Citation
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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.

    Sunil Gupta

    Co-Chair, Driving Digital Strategy

    Sunil Gupta is the Edward W. Carter Professor of Business Administration and  co-chair of the executive program on Driving... View Details

    Keywords: advertising; communications; consumer products; credit card; education industry; financial services; high technology; marketing industry; telecommunications

      Bharat N. Anand

      Bharat N. Anand is the Vice Provost for Advances in Learning at Harvard University, and the Henry R. Byers Professor of Business Administration at Harvard Business School.

      Professor Anand is an expert in digital strategy, media and... View Details

      Keywords: broadcasting; entertainment; information; media; motion pictures; music; publishing industry; sports; television
      • 07 Jul 2019
      • HBS Case

      Walmart's Workforce of the Future

      initiative. “That requires a lot of reskilling of employees and hard choices, in an uncertain environment, in terms of how to deploy capital.” “This digital transformation creates new jobs, but, more important, it changes the nature of... View Details
      Keywords: by Julia Hanna; Retail
      • June 2011 (Revised June 2012)
      • Case

      Sephora Direct: Investing in Social Media, Video, and Mobile

      By: Elie Ofek and Alison Berkley Wagonfeld
      Julie Bornstein, senior vice president of Sephora Direct, is seeking to double her budget for social media and other digital marketing initiatives for 2011. A number of digital efforts implemented in the past two years seem to be bearing fruit and there is a desire to... View Details
      Keywords: History; Leadership; Marketing Strategy; Marketing; Emerging Markets; Investment Return; Investment Funds; Budgets and Budgeting
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      Ofek, Elie, and Alison Berkley Wagonfeld. "Sephora Direct: Investing in Social Media, Video, and Mobile." Harvard Business School Case 511-137, June 2011. (Revised June 2012.)
      • August 2023
      • Case

      Reimagining Hindustan Unilever (A)

      By: Sunil Gupta and Rachna Tahilyani
      In the fall of 2019, the CEO and MD of Hindustan Unilever (HUL), India’s largest fast-moving consumer goods (FMCG) firm, is wondering what to do about their experiments to digitize distribution. Despite three years of intense efforts, their apps to empower retailers... View Details
      Keywords: Experimentation; Digital Transformation; Digital Strategy; Leading Change; Distribution; Decisions; Organizational Change and Adaptation; Consumer Behavior; E-commerce; Competition; Performance; Business Strategy; Marketing; Transformation; Consumer Products Industry; Asia; India
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      Gupta, Sunil, and Rachna Tahilyani. "Reimagining Hindustan Unilever (A)." Harvard Business School Case 524-020, August 2023.
      • 19 Sep 2023
      • Research & Ideas

      What Chandrayaan-3 Says About India's Entrepreneurial Approach to Space

      episodes in the future. Similarly, India is a pioneer in the creation of so-called digital public goods, building on its universal biometric identity initiative, which no nation has been able to replicate. To me, as an immigrant in the... View Details
      Keywords: by Clea Simon, Harvard Gazette; Aerospace
      • September 2020 (Revised December 2020)
      • Case

      Hot Wheels at Mattel: Reinventing the Wheel

      By: Elie Ofek, Andres Terech and Nicole Tempest Keller
      In 2017, Chris Down, Global Brand General Manager for Hot Wheels, and his team from the Advanced Play Group within Mattel, Inc., were considering which innovation path to pursue in order to "future proof" the Hot Wheels franchise going forward. Hot Wheels was the... View Details
      Keywords: Toys; Industry Evolution; Innovation Strategy; Product Development; Growth and Development Strategy; Technological Innovation; Organizational Change and Adaptation; Decision Making; Digital Transformation
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      Ofek, Elie, Andres Terech, and Nicole Tempest Keller. "Hot Wheels at Mattel: Reinventing the Wheel." Harvard Business School Case 521-015, September 2020. (Revised December 2020.)
      • 12 Apr 2022
      • Research & Ideas

      Swiping Right: How Data Helped This Online Dating Site Make More Matches

      marriages began with online dates. “[Online dating platforms] are an extremely interesting application of the general question of influence and digital interactions,” he says, with lessons that can apply to other online engagement... View Details
      Keywords: by Kara Baskin
      • 24 May 2018
      • News

      Distance Still Matters in Business, Despite the Internet

      • 04 Apr 2011
      • HBS Case

      Reinventing the National Geographic Society

      Fossey's 18-year study of mountain gorillas in Rwanda, for one—filling in the empty spots on the world's map as it went along. But when Fahey arrived to head the National Geographic Ventures unit in 1996, the institution was in decline. Decision-making was slow and... View Details
      Keywords: by Sean Silverthorne; Publishing
      • 10 Jan 2024
      • Research & Ideas

      Technology and COVID Upended Tipping Norms. Will Consumers Keep Paying?

      of services. "Some of these are point-of-sale situations where we didn’t traditionally think about tipping 15 percent." “In many establishments, we’re now moving to digital payment systems such as Toast that ask you each time you purchase... View Details
      Keywords: by Anna Lamb, Harvard Gazette
      • 23 May 2018
      • Research & Ideas

      How to Know If Your Neighborhood Is Being Gentrified

      The High Line redevelopment in winter, New York City. sx70 A new study of gentrification shows that the addition of a coffee shop or restaurant in your neighborhood could be an early indicator that housing prices are about to spike. The research also casts some doubt... View Details
      Keywords: by Dina Gerdeman
      • 25 Aug 2015
      • News

      HBX Launches HBX Live – Harvard Business School’s Virtual Classroom

        Jacob M. Cook

        Jacob Cook is a Lecturer in the Marketing Unit at Harvard Business School, where he teaches the EC course Digital Marketing & AI Workshop. His work focuses on how companies design and scale customer acquisition and retention strategies using digital marketing,... View Details

        • 11 Apr 2023
        • News

        Harvard Business Review Announces 2022 HBR Prize Winner

        • Sep 11 2022
        • Testimonial

        Finding New Solutions to Organizational Challenges

          Leila Doumi

          Leila Doumi is a PhD Candidate in the Strategy Unit and an affiliate of the Digital Data and Design (D^3) Institute at Harvard. She conducts research on technology adoption, corporate strategy, and the future of work with a focus... View Details

          • June 2021
          • Case

          Akira Fukabori and Kevin Kajitani at avatarin (A)

          By: Linda A. Hill and Emily Tedards
          In 2016, Akira Fukabori and Kevin Kajitani, aeronautical engineers at All Nippon Airways Co., Ltd., began to wonder why, in a world of accelerating globalization and digital connectivity, those who lived in far-remote villages or impoverished urban areas could not... View Details
          Keywords: Agility; Ecosystem; Innovation Ecosystems; Crowdsourcing; Open Innovation; Partnership; Government; Collaboration; Co-creation; Purpose; Impact; Social Impact; Movement; Organizational Behavior; Organizational Ambidexterity; Ambidexterity; Culture; Culture Change; Global Teams; Experimentation; Space; Airline Industry; Start-up; Platform Business; Platform Strategy; Platform; Digital; Robotics; Robots; Mobility; Strategy; COVID-19; Intrapreneurship; Public-private Partnership; XPRIZE; Space Industry; Avatar; Telepresence; Innovation Lab; Innovation and Invention; Technological Innovation; Partners and Partnerships; Collaborative Innovation and Invention; Alignment; Leadership; Leading Change; Diversity; Organizational Culture; Change Management; Entrepreneurship; Digital Platforms; Transportation Industry; Aerospace Industry; Japan
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          Hill, Linda A., and Emily Tedards. "Akira Fukabori and Kevin Kajitani at avatarin (A)." Harvard Business School Case 421-089, June 2021.
          • December 2018 (Revised October 2020)
          • Case

          Shiseido: Reinvesting in Brand

          By: Jill Avery and Nobuo Sato
          Shiseido was in the midst of a six year corporate turnaround, trying to reverse the effects of decades of under-investment in R&D and marketing which had led to a cycle of declining customer support and brand value. Would the CEO’s VISION 2020 plan, centered on four... View Details
          Keywords: Brand Management; Brand Value; Turnaround; Brand Portfolio; Brand Communication; Global Brands; Digital Marketing; Return On Investment; Marketing ROI; Internet Marketing; Marketing; Marketing Strategy; Brands and Branding; Value; Growth and Development Strategy; Investment Return; Consumer Behavior; Beauty and Cosmetics Industry; Consumer Products Industry; Japan; Asia
          Citation
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          Avery, Jill, and Nobuo Sato. "Shiseido: Reinvesting in Brand." Harvard Business School Case 519-026, December 2018. (Revised October 2020.)
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