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    • All HBS Web  (193)
      • Faculty Publications  (60)

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      • January 2023
      • Teaching Note

      Duolingo: Teaching Languages to the Masses

      By: Youngme Moon
      At the time the case is written, Duolingo is the most popular language learning service in the world. The company has more than 40 million monthly active users, and the company’s total annual revenue has reached $250 million a year. Still, the sustainability of the...  View Details
      Keywords: Marketing; Marketing Strategy; Customer Relationship Management; Acquisition; Retention; Innovation and Invention
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      Moon, Youngme. "Duolingo: Teaching Languages to the Masses." Harvard Business School Teaching Note 323-070, January 2023.
      • June 2022 (Revised September 2022)
      • Case

      Netflix’s Culture: Binge or Cringe?

      By: Hubert Joly, Leonard A. Schlesinger, James Barnett and Stacy Straaberg
      In April 2022, streaming entertainment company Netflix lost customers for the first time in more than 10 years. Once a first mover in the streaming landscape, Netflix was facing competition from Amazon Prime Video, Disney+, HBO Max, and others. A key component of...  View Details
      Keywords: Compensation and Benefits; Employees; Recruitment; Resignation and Termination; Retention; Selection and Staffing; Innovation and Management; Innovation Strategy; Leadership Style; Business or Company Management; Management Style; Media; Business Processes; Organizational Culture; Organizational Structure; Performance Expectations; Performance Productivity; Creativity; Business Strategy; Entertainment and Recreation Industry; Media and Broadcasting Industry; Motion Pictures and Video Industry; Video Game Industry; North America; California; Canada; Europe; Middle East; Africa; Asia; Latin America
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      Joly, Hubert, Leonard A. Schlesinger, James Barnett, and Stacy Straaberg. "Netflix’s Culture: Binge or Cringe?" Harvard Business School Case 522-096, June 2022. (Revised September 2022.)
      • February 2022
      • Case

      Cleveland Clinic Abu Dhabi

      By: Linda A. Hill and Emily Tedards
      In 2006, the Cleveland Clinic and Mubadala Investment Company partnered with a bold ambition to deliver world class healthcare in the United Arab Emirates. In 2015, after nearly a decade of planning and construction, Cleveland Clinic Abu Dhabi opened its doors. By...  View Details
      Keywords: Organizational Behavior; Culture; Alignment; Organizational Effectiveness; Purpose; Impact; Leadership Development; Diversity; Collaboration; Co-creation; Learning Organizations; Empowerment; Teams; Team Dynamics; Teamwork; Team Effectiveness; Trust; Talent; Talent Development And Retention; Psychological Safety; Organizational Evolution; Coaching; Board; Analytics; Innovation; Data; Data Visualization; Digital Technology; Digital; Customer Experience; Experimentation; Change Management; Data-driven Decision-making; Debates; Ecosystem; Partnership; Telemedicine; Sustainability; Global Organizations; Local; Hospital; Healthcare; United Arab Emirates; Health Care and Treatment; Partners and Partnerships; Globalization; Quality; Organizational Culture; Mission and Purpose; Innovation and Management; Information Technology; Joint Ventures; Leadership; Performance Effectiveness; Abu Dhabi; United Arab Emirates
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      Hill, Linda A., and Emily Tedards. "Cleveland Clinic Abu Dhabi." Harvard Business School Case 422-058, February 2022.
      • February 2022
      • Case

      Cleveland Clinic Abu Dhabi (Abridged)

      By: Linda A. Hill and Emily Tedards
      In 2006, the Cleveland Clinic and Mubadala Investment Company partnered with a bold ambition to deliver world class healthcare in the United Arab Emirates. In 2015, after nearly a decade of planning and construction, Cleveland Clinic Abu Dhabi opened its doors. By...  View Details
      Keywords: Organization Behavior; Culture; Alignment; Organizational Effectiveness; Purpose; Impact; Leadership Development; Diversity; Collaboration; Co-creation; Learning Organizations; Empowerment; Teams; Team Dynamics; Teamwork; Team Effectiveness; Trust; Talent; Talent Development And Retention; Psychological Safety; Organizational Evolution; Coaching; Board; Analytics; Innovation; Data; Data Visualization; Digital Technology; Digital; Customer Experience; Experimentation; Change Management; Data-driven Decision-making; Debates; Ecosystem; Partnership; Telemedicine; Sustainability; Global Organizations; Local; Hospital; Healthcare; United Arab Emirates; Health Care and Treatment; Partners and Partnerships; Globalization; Quality; Organizational Culture; Mission and Purpose; Innovation and Management; Information Technology; Joint Ventures; Leadership; Performance Effectiveness; Abu Dhabi; United Arab Emirates
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      Hill, Linda A., and Emily Tedards. "Cleveland Clinic Abu Dhabi (Abridged)." Harvard Business School Case 422-056, February 2022.
      • February 2022
      • Teaching Note

      AptDeco: Circular Economy Furniture Marketplace

      By: Ayelet Israeli
      Teaching Note for HBS Case No. 521-069. AptDeco, a used furniture marketplace, was growing rapidly in the tri-state area. The co-founders were confident that the business model, financial position, and unit economics positioned AptDeco for scaling in the massive $120...  View Details
      Keywords: E-Commerce Strategy; Mobile; Word-of-Mouth; Word Of Mouth; Word-of-mouth Marketing; Internet Marketing; Growth Strategy; Platform; Platforms; Two Sided Markets; Two-sided Market; Two-sided Marketplace; Two-Sided Markets; Two-sided Network; Black Entrepreneurs; Black Leadership; African Americans; African-American Protagonist; Circular; Peer-to-peer Markets; Furniture Industry; Growth Hacking; Monetization Strategy; Growth Management; Marketing Strategy; Entrepreneurship; Digital Platforms; Marketing Channels; Digital Marketing; Consumer Behavior; Acquisition; Retention; Growth and Development Strategy; Customer Focus and Relationships; Expansion; Brands and Branding; E-commerce; Retail Industry; Consumer Products Industry; Technology Industry; Web Services Industry; United States; North America; New York (city, NY); New York (state, US)
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      Israeli, Ayelet. "AptDeco: Circular Economy Furniture Marketplace." Harvard Business School Teaching Note 522-078, February 2022.
      • June 23, 2021
      • Article

      Research: When A/B Testing Doesn't Tell You the Whole Story

      By: Eva Ascarza
      When it comes to churn prevention, marketers traditionally start by identifying which customers are most likely to churn, and then running A/B tests to determine whether a proposed retention intervention will be effective at retaining those high-risk customers. While...  View Details
      Keywords: Customer Retention; Churn; Targeting; Market Research; Marketing; Investment Return; Customers; Retention; Research
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      Ascarza, Eva. "Research: When A/B Testing Doesn't Tell You the Whole Story." Harvard Business Review Digital Articles (June 23, 2021).
      • March 2021
      • Case

      Chime Solutions

      By: Shai Bernstein, William R. Kerr, Christopher Stanton and Mel Martin
      Just two years after launching their 10k by 2020 initiative to hire 10,000 employees by 2020, the COVID-19 pandemic forced Chief Executive Officer Mark Wilson to send nearly all of his staff at Chime Solutions (Chime) to work from home. Chime was a customer contact...  View Details
      Keywords: Finance; Working Capital; Operations; Recruitment; Performance; Change Management; Retention; Financial Institutions; Employee Relationship Management; Talent and Talent Management; Growth Management; Communications Industry; Service Industry; United States
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      Bernstein, Shai, William R. Kerr, Christopher Stanton, and Mel Martin. "Chime Solutions." Harvard Business School Case 821-105, March 2021.
      • March 17, 2021
      • Other Article

      Beyond Pajamas: Sizing Up the Pandemic Shopper

      By: Ayelet Israeli, Eva Ascarza and Laura Castrillo
      A first look at how the COVID-19 pandemic impacted e-commerce apparel shopping in the US and the UK. Extensive analysis and interactive graphics utilizing millions of transactions.
      While the pandemic is still playing out, our preliminary investigations...  View Details
      Keywords: Retail; Retail Analytics; Consumer; Pandemic; COVID; COVID-19; Apparel; Ecommerce; Online Shopping; Online Apparel; Online Sales; Returns; CRM; Customer Retention; Customer Experience; Customer Value; Digital; Customer Focus and Relationships; Customers; Health Pandemics; Consumer Behavior; Customer Relationship Management; Internet and the Web; Behavior; E-commerce; Retail Industry; Apparel and Accessories Industry; Technology Industry; United States; United Kingdom
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      Israeli, Ayelet, Eva Ascarza, and Laura Castrillo. "Beyond Pajamas: Sizing Up the Pandemic Shopper." Harvard Business School Working Knowledge (March 17, 2021).
      • 2022
      • Working Paper

      Canary Categories

      By: Eric Anderson, Chaoqun Chen, Ayelet Israeli and Duncan Simester
      Past customer spending in a category is generally a positive signal of future customer spending. We show that there exist “Canary Categories” for which the reverse is true. The more customers purchase in these categories, the less likely these customers are to return...  View Details
      Keywords: Churn; Churn Management; Churn/retention; Retention; Assortment Planning; Retail; Retailing; Retailing Industry; Preference Heterogeneity; Customer Relationship Management; Consumer Behavior; Retail Industry; United States
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      Anderson, Eric, Chaoqun Chen, Ayelet Israeli, and Duncan Simester. "Canary Categories." Working Paper, August 2022.
      • January 2021 (Revised March 2021)
      • Supplement

      E-Commerce Analytics for CPG Firms (C): Free Delivery Terms

      By: Ayelet Israeli and Fedor (Ted) Lisitsyn
      The E-Commerce Analytics group at the traditional CPG firm was in charge of compiling various online sales reports, as well as making data-driven recommendations for sales and marketing tactics. In a series of exercises, students address different data challenges for...  View Details
      Keywords: Data; Data Analysis; Data Analytics; Data Sharing; CPG; Consumer Packaged Goods (CPG); Delivery Planning; Customer Lifetime Value; Online Channel; Retail; Retail Analytics; Retailing Industry; Ecommerce; Grocery; Grocery Delivery; Margins; Retention; Analytics and Data Science; Analysis; Retail Industry; Consumer Products Industry; United States
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      Israeli, Ayelet, and Fedor (Ted) Lisitsyn. "E-Commerce Analytics for CPG Firms (C): Free Delivery Terms." Harvard Business School Spreadsheet Supplement 521-714, January 2021. (Revised March 2021.)
      • January 2021 (Revised March 2021)
      • Exercise

      E-Commerce Analytics for CPG Firms (C): Free Delivery Terms

      By: Ayelet Israeli and Fedor (Ted) Lisitsyn
      The E-Commerce Analytics group at the traditional CPG firm was in charge of compiling various online sales reports, as well as making data-driven recommendations for sales and marketing tactics. In a series of exercises, students address different data challenges for...  View Details
      Keywords: Data; Data Analysis; Data Analytics; Data Sharing; CPG; Consumer Packaged Goods (CPG); Delivery Planning; Customer Lifetime Value; Online Channel; Retail; Retail Analytics; Retailing Industry; Ecommerce; Grocery; Grocery Delivery; Margins; Analytics and Data Science; Retention; E-commerce; Retail Industry; Consumer Products Industry; United States
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      Israeli, Ayelet, and Fedor (Ted) Lisitsyn. "E-Commerce Analytics for CPG Firms (C): Free Delivery Terms." Harvard Business School Exercise 521-080, January 2021. (Revised March 2021.)
      • 2020
      • Working Paper

      The Twofold Effect of Customer Retention in Freemium Settings

      By: Eva Ascarza, Oded Netzer and Julian Runge
      The main tradeoff in designing freemium services is how much of the product to offer for free. At the heart of such a tradeoff is the balancing act of providing a valuable free product in order to acquire and engage consumers, while making the free product limited...  View Details
      Keywords: Freemium; Retention/churn; Field Experiment; Field Experiments; Gaming; Gaming Industry; Mobile App; Mobile App Industry; Monetization; Monetization Strategy; Games, Gaming, and Gambling; Mobile Technology; Customers; Retention; Product Design; Strategy
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      Ascarza, Eva, Oded Netzer, and Julian Runge. "The Twofold Effect of Customer Retention in Freemium Settings." Harvard Business School Working Paper, No. 21-062, November 2020.
      • September–October 2020
      • Article

      Managing Churn to Maximize Profits

      By: Aurelie Lemmens and Sunil Gupta
      Customer defection threatens many industries, prompting companies to deploy targeted, proactive customer retention programs and offers. A conventional approach has been to target customers either based on their predicted churn probability or their responsiveness to a...  View Details
      Keywords: Churn Management; Defection Prediction; Loss Function; Stochastic Gradient Boosting; Customer Relationship Management; Consumer Behavior; Profit
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      Lemmens, Aurelie, and Sunil Gupta. "Managing Churn to Maximize Profits." Marketing Science 39, no. 5 (September–October 2020): 956–973.
      • June 2020
      • Background Note

      Customer Management Dynamics and Cohort Analysis

      By: Elie Ofek, Barak Libai and Eitan Muller
      The digital revolution has allowed companies to amass considerable amounts of data on their customers. Using this information to generate actionable insights is fast becoming a critical skill that firms must master if they wish to effectively compete and win in today’s...  View Details
      Keywords: Cohort Analysis; Customers; Analytics and Data Science; Segmentation; Analysis; Customer Value and Value Chain
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      Ofek, Elie, Barak Libai, and Eitan Muller. "Customer Management Dynamics and Cohort Analysis." Harvard Business School Background Note 520-122, June 2020.
      • May 2020
      • Article

      Sales Leadership During and After the Crisis

      By: Frank V. Cespedes
      Because customer acquisition and retention are the lifeblood of a for-profit enterprise, sales activities establish foundational conditions for a business. In turn, sales managers’ responsibilities in a crisis extend beyond keeping the lights on. Their leadership makes...  View Details
      Keywords: Sales; Leadership; Health Pandemics; Crisis Management
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      Cespedes, Frank V. "Sales Leadership During and After the Crisis." Top Sales Magazine (May 2020), 28–29.
      • April 2020 (Revised June 2020)
      • Case

      Oriental Land Co., Ltd.—Tokyo Disney Resort

      By: Ramon Casadesus-Masanell and Akiko Kanno
      This case describes the history of Oriental Land Co. Ltd.’s (OLC's) Tokyo Disney Resort (TDR), its operations, the extent of vertical integration, and the challenges it faced in 2018 as OLC's chairman and CEO, Toshio Kagami, contemplated how best to deal with...  View Details
      Keywords: Strategy For Multi-business Firm; Business Models; Growth; Theme Parks; Disney; Disney Parks; Licensing; Royalties; Two-part Tariffs; Oriental Land Co.; Tokyo Disneyland; Tokyo DisneySea; Tokyo Disney Resort; Tokyo Disney; Growth Strategy; Hotels; Hotel Industry; Partnership; Development; Attractions; Rides; Urayasu; Kagami; Congestion; Pricing; Amusement Parks; Amusement Park Industry; Brand; Branding; History; OLC; Corporate Strategy; Competitive Strategy; Business History; Price; Retention; Growth and Development; Growth and Development Strategy; Brands and Branding; Agreements and Arrangements; Contracts; Operations; Vertical Integration; Problems and Challenges; Partners and Partnerships; Business Strategy; Expansion; Rail Transportation; Transportation Networks; Accommodations Industry; Entertainment and Recreation Industry; Tourism Industry; Asia; Japan; Tokyo; United States
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      Casadesus-Masanell, Ramon, and Akiko Kanno. "Oriental Land Co., Ltd.—Tokyo Disney Resort." Harvard Business School Case 720-460, April 2020. (Revised June 2020.)
      • September 2019 (Revised June 2020)
      • Case

      Othellonia: Growing a Mobile Game

      By: Eva Ascarza, Tomomichi Amano and Sunil Gupta
      In the summer of 2019, Yu Sasaki, Head of the Game Division of DeNA, a Japanese mobile gaming company, is evaluating various growth strategies for its recent game Othellonia. Sasaki needs to decide if he should focus on customer acquisition, retention, or monetization.  View Details
      Keywords: Targeting; Retention/churn; Freemium; Monetization; Customer Relationship Management; Games, Gaming, and Gambling; Mobile and Wireless Technology; Growth and Development Strategy; Marketing; Customers; Marketing Strategy; Retention; Acquisition; Entertainment and Recreation Industry; Japan
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      Ascarza, Eva, Tomomichi Amano, and Sunil Gupta. "Othellonia: Growing a Mobile Game." Harvard Business School Case 520-016, September 2019. (Revised June 2020.)
      • 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.
      • 2021
      • Working Paper

      Improving Customer Compatibility with Tradeoff Transparency

      By: Ryan W. Buell and MoonSoo Choi
      Through a large-scale field experiment with 393,036 customers considering opening a credit card account with a nationwide retail bank, we investigate how providing transparency into an offering’s tradeoffs affects subsequent rates of customer acquisition and long-run...  View Details
      Keywords: Behavioral Operations; Operational Transparency; Customer Compatibility; Customer Behavior; Consumer Behavior; Decision Making; Operations; Strategy
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      Buell, Ryan W., and MoonSoo Choi. "Improving Customer Compatibility with Tradeoff Transparency." Harvard Business School Working Paper, No. 20-013, July 2019. (Revised January 2021.)
      • February 2019
      • Teaching Note

      Talent@Tencent

      By: Tarun Khanna
      Late in 2016, two senior human resources (HR) executives at Tencent Holdings (Tencent), China’s leading Internet services firm, are assessing the effectiveness of the company’s talent management practices in responding to Tencent’s sustained hypergrowth. Over the...  View Details
      Keywords: Talent and Talent Management; Employees; Retention; Entrepreneurship; Employee Relationship Management; Web Services Industry; China
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      Khanna, Tarun. "Talent@Tencent." Harvard Business School Teaching Note 719-466, February 2019.
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