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      • August 2019 (Revised March 2022)
      • Case

      Lemonade: Disrupting Insurance with Instant Everything, Killer Prices, and a Big Heart

      By: Elie Ofek and Danielle Golan
      Launching its first products in the fall of 2016 in New York, insurtech startup Lemonade was on a mission to disrupt the insurance market by using AI and behavioral economics principles. The company offered renters, homeowners, and condo insurance and mainly targeted... View Details
      Keywords: AI; Business Startups; Insurance; Technological Innovation; Business Model; Disruption; Brands and Branding; Growth and Development Strategy; Global Strategy; Decision Making; Insurance Industry; Technology Industry
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      Ofek, Elie, and Danielle Golan. "Lemonade: Disrupting Insurance with Instant Everything, Killer Prices, and a Big Heart." Harvard Business School Case 520-020, August 2019. (Revised March 2022.)
      • 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.
      • Article

      People Make It So Hard to Ditch Plastic Straws

      By: Scott Duke Kominers
      Rarely has a minor consumer product received more vilification than the plastic straw. As a symbol of human wastefulness and our careless disregard for the environment, straws are the near-perfect villain. You use a plastic straw once and toss it, but it stays with us... View Details
      Keywords: Environmental Sustainability; Governing Rules, Regulations, and Reforms; Consumer Behavior
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      Kominers, Scott Duke. "People Make It So Hard to Ditch Plastic Straws." Bloomberg Opinion (July 15, 2019).
      • 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.
      • June 2019
      • Article

      Brokers vs. Retail Investors: Conflicting Interests and Dominated Products

      By: Mark Egan
      I study how brokers distort household investment decisions. Using a novel convertible bond dataset, I find that consumers often purchase dominated bonds—cheap and expensive versions of otherwise identical bonds coexist in the market. The empirical evidence suggests... View Details
      Keywords: Brokers; Fiduciary Standard; Consumer Finance; Structured Products; Household; Investment; Decisions; Motivation and Incentives; Conflict of Interests
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      Egan, Mark. "Brokers vs. Retail Investors: Conflicting Interests and Dominated Products." Journal of Finance 74, no. 3 (June 2019): 1217–1260.
      • June 2019
      • Article

      Debt Traps? Market Vendors and Moneylender Debt in India and the Philippines

      By: Dean Karlan, Sendhil Mullainathan and Benjamin Roth
      A debt trap occurs when someone takes on a high-interest rate loan and is barely able to pay back the interest, and thus perpetually finds themselves in debt (often by refinancing). Studying such practices is important for understanding financial decision-making of... View Details
      Keywords: Borrowing and Debt; Household; Personal Finance; Decision Making; Behavior; India; Philippines
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      Karlan, Dean, Sendhil Mullainathan, and Benjamin Roth. "Debt Traps? Market Vendors and Moneylender Debt in India and the Philippines." American Economic Review: Insights 1, no. 1 (June 2019): 27–42.
      • April 2019 (Revised October 2020)
      • Case

      Kraft Heinz: The $8 Billion Brand Write-Down

      By: Jill Avery
      On Friday, February 22, 2019, following an unexpected and disappointing earnings report, The Kraft Heinz Company’s stock price fell 27%, wiping out $16 billion in market value. CEO Bernardo Hees had announced that the company had taken a $15.4 billion asset write-down,... View Details
      Keywords: Brand Management; Brand Value; Brand Equity; Marketing ROI; Brand Storytelling; Intangible Assets; Brand Valuation; Marketing; Marketing Strategy; Brands and Branding; Management; Corporate Strategy; Consumer Behavior; Food; Marketing Communications; Advertising; Private Equity; Consumer Products Industry; Consumer Products Industry; United States; North America
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      Avery, Jill. "Kraft Heinz: The $8 Billion Brand Write-Down." Harvard Business School Case 519-076, April 2019. (Revised October 2020.)
      • March 2019
      • Case

      HOPI: Turkey's Shopping Companion

      By: Sunil Gupta, Donald Ngwe and Gamze Yucaoglu
      The case opens in 2017 as Onur Erbay, CEO of HOPI, a multi-vendor loyalty platform, is contemplating a critical decision. The case chronicles the origins of Boyner Group, the parent company of HOPI and a major retailer in Turkey, and development of retail and customer... View Details
      Keywords: Loyalty Programs; Multi-vendor Platform; Retail; Big Data; Customer Relationship Management; Mobile and Wireless Technology; Business Model; Analytics and Data Science; Competitive Strategy; Decision Making; Applications and Software; Digital Platforms; Technology Industry; Retail Industry; Turkey
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      Gupta, Sunil, Donald Ngwe, and Gamze Yucaoglu. "HOPI: Turkey's Shopping Companion." Harvard Business School Case 519-057, March 2019.
      • 2020
      • Working Paper

      Overcoming the Cold Start Problem of CRM Using a Probabilistic Machine Learning Approach

      By: Eva Ascarza
      The success of Customer Relationship Management (CRM) programs ultimately depends on the firm's ability to understand consumers' preferences and precisely capture how these preferences may differ across customers. Only by understanding customer heterogeneity, firms can... View Details
      Keywords: Customer Management; Targeting; Deep Exponential Families; Probabilistic Machine Learning; Cold Start Problem; Customer Relationship Management; Customer Value and Value Chain; Consumer Behavior; Analytics and Data Science; Mathematical Methods; Retail Industry
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      Padilla, Nicolas, and Eva Ascarza. "Overcoming the Cold Start Problem of CRM Using a Probabilistic Machine Learning Approach." Harvard Business School Working Paper, No. 19-091, February 2019. (Revised May 2020. Accepted at the Journal of Marketing Research.)
      • 2025
      • Working Paper

      A Preference for Revision Absent Improvement

      By: Ximena Garcia-Rada, Leslie K. John, Ed O’Brien and Michael I. Norton
      People regularly encounter revised stimuli (e.g., revised versions of products, new editions of books, tweaked recipes, and technological updates). In principle, a world of constant revision should benefit people by affording them the most up-to-date offerings. In... View Details
      Keywords: Product Change; Versioning; Expectancy Effects; Heuristics; Intuitive Processing; Product Marketing; Change; Perception; Consumer Behavior
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      Garcia-Rada, Ximena, Leslie K. John, Ed O’Brien, and Michael I. Norton. "A Preference for Revision Absent Improvement." Harvard Business School Working Paper, No. 19-087, February 2019. (Revised April 2025.)
      • 2019
      • Chapter

      Behavioral Economics and Health-Care Markets

      By: Amitabh Chandra, Benjamin Handel and Joshua Schwartzstein
      This chapter summarizes research in behavioral health economics, focusing on insurance markets and product markets in health care. We argue that the prevalence of choice difficulties and biases leading to mistakes in these markets establish a special place for them in... View Details
      Keywords: Behavioral Economics; Consumer Behavior; Economics; Health Care and Treatment; Insurance; Markets
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      Chandra, Amitabh, Benjamin Handel, and Joshua Schwartzstein. "Behavioral Economics and Health-Care Markets." Chap. 6 in Handbook of Behavioral Economics: Foundations and Applications 2, edited by B. Douglas Bernheim, Stefano DellaVigna, and David Laibson, 459–502. Amsterdam: Elsevier/North-Holland, 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.)
      • 2019
      • Working Paper

      The Impact of Increasing Search Frictions on Online Shopping Behavior: Evidence from a Field Experiment

      By: Donald Ngwe, Kris J. Ferreira and Thales Teixeira
      Many online stores are designed such that shoppers can easily access any available discounted products. We propose that deliberately increasing search frictions by placing small obstacles to locating discounted items can improve online retailers’ margins and even... View Details
      Keywords: E-commerce; Online Retailing; Friction; Effor; Search Costs; Price Discrimination; Consumer Behavior; Price; Search Technology
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      Ngwe, Donald, Kris J. Ferreira, and Thales Teixeira. "The Impact of Increasing Search Frictions on Online Shopping Behavior: Evidence from a Field Experiment." Harvard Business School Working Paper, No. 19-080, January 2019.
      • January 2019
      • Supplement

      Understanding the Brand Equity of Nestlé Crunch Bar (B): Data Analysis

      By: Jill Avery and Gerald Zaltman
      In early 2018, Nestlé announced the sale of its U.S. candy-making division and a select collection of 20 of its confectionery brands, including the Nestlé Crunch Bar, to Ferrero SpA for $2.8 billion. Luckily, an old consumer research study on the Nestlé Crunch Bar... View Details
      Keywords: Brand Management; Market Research; Brand Positioning; Value Proposition; Consumer Products; Fast Moving Consumer Goods; Qualitative Methods; Zaltman Metaphor Elicitation Technique; ZMET; Data Analysis; Marketing; Marketing Strategy; Brands and Branding; Consumer Behavior; Marketing Communications; Analytics and Data Science; Analysis; Consumer Products Industry; Consumer Products Industry; Consumer Products Industry; United States; North America; Italy
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      Avery, Jill, and Gerald Zaltman. "Understanding the Brand Equity of Nestlé Crunch Bar (B): Data Analysis." Harvard Business School Supplement 519-062, January 2019.
      • January 2019
      • Case

      Understanding the Brand Equity of Nestlé Crunch Bar: A Market Research Case

      By: Jill Avery and Gerald Zaltman
      In early 2018, Nestlé announced the sale of its U.S. candy-making division and a select collection of 20 of its confectionery brands, including the Nestlé Crunch Bar, to Ferrero SpA for $2.8 billion. Under the terms of the Nestlé acquisition, each of the purchased... View Details
      Keywords: Brand Equity; Marketing; Market Research; Qualitative Research; Marketing Communication; Customer Satisfaction; Brands and Branding; Consumer Behavior; Marketing Communications; Marketing Strategy; Food and Beverage Industry; United States; North America; Italy
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      Avery, Jill, and Gerald Zaltman. "Understanding the Brand Equity of Nestlé Crunch Bar: A Market Research Case." Harvard Business School Case 519-061, January 2019.
      • January 2019 (Revised October 2020)
      • Technical Note

      Brand Storytelling

      By: Jill Avery
      Marketers have long appreciated the value and power of storytelling. Stories fill brands with resonant and relevant meaning and empower brands to serve as critical elements in the lives of consumers. Mastering the art of brand storytelling is an increasingly important... View Details
      Keywords: Brand Communication; Brand Management; Brand Storytelling; Marketing; Marketing Communications; Brands and Branding; Marketing Strategy; Advertising; Consumer Behavior; Consumer Products Industry
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      Avery, Jill. "Brand Storytelling." Harvard Business School Technical Note 519-049, January 2019. (Revised October 2020.)
      • 2019
      • Book

      The Age of Surveillance Capitalism: The Fight for a Human Future at the New Frontier of Power

      By: Shoshana Zuboff
      In this masterwork of original thinking and research, Shoshana Zuboff provides startling insights into the phenomenon that she has named surveillance capitalism. The stakes could not be higher: a global architecture of behavior modification threatens human nature in... View Details
      Keywords: Consumer Profiling; Consumer Behavior; Forecasting and Prediction; Information Technology; Power and Influence; Ethics; Society; Transformation
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      Zuboff, Shoshana. The Age of Surveillance Capitalism: The Fight for a Human Future at the New Frontier of Power. New York: PublicAffairs, 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; Communications Industry; Employment Industry; Media and Broadcasting Industry; Technology Industry; Telecommunications 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 (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; Consumer Products Industry; Consumer Products 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 (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; Consumer Products Industry; Consumer Products Industry; Japan; Asia
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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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