Publications

June 2025
Supplement

Full-Funnel Advertising on TikTok: An Experiment

By: Jeremy Yang and Ayelet Israeli

TikTok’s Marketing Science team developed a new type of advertising strategy beyond branding and performance advertising, called full-funnel advertising. Branding ads focused on brand building at the top of the funnel by generating consumer awareness, while performance... View Details

February 2017
Case

Yemeksepeti: Growing and Expanding the Business Model through Data

By: William R. Kerr, Gamze Yucaoglu and Eren Kuzucu

In October 2016, Nevzat Aydin, co-founder and CEO of Yemeksepeti, the Turkish online food-ordering company, was looking over the company's quarterly results and projections for the upcoming year with his management team. It had been almost a year and a half since Aydin... View Details

26 Jun 2023
Research & Ideas

Want to Leave a Lasting Impression on Customers? Don't Forget the (Proverbial) Fireworks

way of leaving an impression. “A strong ending can have a big impact on people’s evaluations when they look back on an experience,” says De Freitas, coauthor of the working paper “Summarizing the Mental... View Details

Keywords: by Michael Blanding; Entertainment & Recreation

19 Sep 2021
News

Prof. Maria Roche of Harvard Business School on the Impact of Inter-Personal Exchange on Innovation

January 2025 (Revised April 2025)
Case

Duolingo: On a 'Streak'

By: Jeffrey F. Rayport, Nicole Tempest Keller and Nicole Luo

In December 2024, Severin Hacker, Co-Founder and Chief Technology Officer of Duolingo, reflected on the remarkable evolution of the language-learning app he helped launch in 2011. As the #1 most downloaded education app in the world, Duolingo had over 100 million... View Details

Keywords: Learning; AI and Machine Learning; Growth and Development Strategy; Motivation and Incentives; Diversification; Business Model; Market Entry and Exit; Technology Industry; Education Industry; United States

September 2017 (Revised September 2023)
Case

Chase Sapphire: Creating a Millennial Cult Brand

By: Shelle Santana, Jill Avery and Christine Snively

The launch of the Chase Sapphire Reserve credit card was enthusiastically received by millennial consumers, a cohort that had previously eluded JPMorgan Chase and its competitors. With the one-year anniversary of the launch approaching, managers are focused on... View Details

December 2018 (Revised June 2021)
Case

Bulb 2015: Foundation

By: John R. Wells and Benjamin Weinstock

In late August 2015, Amit Gudka and Hayden Wood, co-founders of Bulb, Ltd (Bulb), were ready to offer affordable renewable energy to the United Kingdom’s 27 million households. They hoped to capitalize on the hundreds of thousands of customers switching their energy... View Details

09 Apr 2021
Blog Post

Reflections on Student Conferences in 2020

In November 2020, three HBS student clubs hosted three separate virtual conferences that drew over 600 attendees, demonstrating the strong and growing interest in the critical connection between business and the environment among HBS MBAs. Each of the themes, while... View Details

February 2001
Case

PlanetFeedback: The Voice of One ... The Power of Many (A)

By: James L. Heskett

The management of PlanetFeedback in proposes a merger with Intelliseek. Their goal is to create a comprehensive C2B and B2B business focused on the generation and analysis for business clients of consumer feedback data via the Internet, Planet Feedback's board of... View Details

Keywords: Mergers and Acquisitions; Decisions; Information Management; Analytics and Data Science; Business Strategy; Internet and the Web; Information Technology Industry

June 2025
Exercise

Full-Funnel Advertising on TikTok: An Experiment

By: Jeremy Yang and Ayelet Israeli

TikTok’s Marketing Science team developed a new type of advertising strategy beyond branding and performance advertising, called full-funnel advertising. Branding ads focused on brand building at the top of the funnel by generating consumer awareness, while performance... View Details

2022
Working Paper

Getting on the Map: The Impact of Online Listings on Business Performance

By: Michael Luca, Abhishek Nagaraj and Gauri Subramani

We evaluate the extent to which small businesses maintain an online presence, looking at restaurant listings on a major online review platform. While the majority of restaurants have an online presence, we find that roughly 18 percent in our sample have no presence as... View Details

Keywords: Small Business; Internet and the Web; Revenue; Digital Marketing; Food and Beverage Industry

June 2017 (Revised October 2017)
Case

Uber in 2017: One Bumpy Ride

By: Suraj Srinivasan, Jay W. Lorsch and Quinn Pitcher

Uber Technologies Inc., the popular ride-hailing company, entered 2017 having doubled its bookings in 2016 and achieving a valuation of nearly $70 billion, making it the largest venture capital-backed company in the world. Co-founder and CEO Travis Kalanick embodied... View Details

Keywords: Governance; Information Technology; Transportation; Venture Capital; Organizational Culture; Technology Industry; Transportation Industry; United States

10 Oct 2011
Research & Ideas

Retailing Revolution: Category Killers on the Brink

category levels, which over time would destroy the economics of the entire store. Amazon.com and other e-commerce players did a tremendous job focusing on goods and categories that shoppers were now willing... View Details

Keywords: by Rajiv Lal & Jose B. Alvarez; Retail

April 2022
Teaching Note

Banorte Móvil: Data-Driven Mobile Growth

By: Ayelet Israeli and Carla Larangeira

In mid-2019, Carlos Hank was deliberating over the results for Banorte Móvil—the mobile application for Banorte, Mexico’s most profitable and second-largest financial institution. Hank, who had been appointed as Banorte´s Chairman of the Board in January 2015, had... View Details

Keywords: Data Analytics; Customer Lifetime Value; Financial Institutions; Mobile and Wireless Technology; Growth and Development Strategy; Customers; Technology Adoption; Communication Strategy; Banking Industry; Mexico; Latin America