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      • August 2025
      • Article

      Revenue Collapses and the Consumption of Small Business Owners in the COVID-19 Pandemic

      By: Olivia S. Kim, Jonathan A. Parker and Antoinette Schoar
      Using financial account data linking small businesses to their owner households, we examine how business owners’ consumption responded to changes in business revenues during the COVID-19 crisis. In the first two months following the National Emergency, business... View Details
      Keywords: Revenue; Small Business; Health Pandemics; Spending; Consumer Behavior
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      Kim, Olivia S., Jonathan A. Parker, and Antoinette Schoar. "Revenue Collapses and the Consumption of Small Business Owners in the COVID-19 Pandemic." Art. 104079. Journal of Financial Economics 170 (August 2025).
      • July 18, 2025
      • Article

      Using Gen AI for Early-Stage Market Research

      By: James Brand, Ayelet Israeli and Donald Ngwe
      Generative AI, particularly large language models (LLMs), offers a promising new tool for early-stage market research by simulating customer responses to product concepts. This can allow companies to draw conclusions similar to those they’d obtain by survey customers... View Details
      Keywords: Large Language Models; Large Language Model; Generative Ai; Artificial Intelligence; Market Research; Research; Marketing; AI and Machine Learning; Analytics and Data Science; Analysis; Customers; Consumer Behavior; Technology Industry; Information Technology Industry
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      Brand, James, Ayelet Israeli, and Donald Ngwe. "Using Gen AI for Early-Stage Market Research." Harvard Business Review (website) (July 18, 2025).
      • July 2025
      • Teaching Note

      Designed for Purpose: “Never a Failure. Always a Lesson”

      By: James Riley and Andrea Dorbu
      In 2017, Rihanna launched Fenty Beauty under LVMH, disrupting the cosmetics industry with an inclusive 'Beauty for All' strategy that emphasized accessibility across skin tones. The brand’s success was followed by the launch of Savage X Fenty, a lingerie line upholding... View Details
      Keywords: Cultural Entrepreneurship; Brands and Branding; Luxury; Consumer Behavior; Market Entry and Exit; United States
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      Riley, James, and Andrea Dorbu. "Designed for Purpose: “Never a Failure. Always a Lesson”." Harvard Business School Teaching Note 426-009, July 2025.
      • July 2025
      • Case

      Designed for Purpose: “Never a Failure. Always a Lesson”

      By: James Riley and Andrea Dorbu
      In 2017, Rihanna launched Fenty Beauty under LVMH, disrupting the cosmetics industry with an inclusive 'Beauty for All' strategy that emphasized accessibility across skin tones. The brand’s success was followed by the launch of Savage X Fenty, a lingerie line upholding... View Details
      Keywords: Cultural Entrepreneurship; Brands and Branding; Luxury; Consumer Behavior; Market Entry and Exit; United States
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      Riley, James, and Andrea Dorbu. "Designed for Purpose: “Never a Failure. Always a Lesson”." Harvard Business School Case 426-008, July 2025.
      • 2025
      • Working Paper

      In Privacy We Trust: The Effect of Privacy Regulations on Data Sharing Behavior

      By: Ozge Demirci, Ayelet Israeli and Eva Ascarza
      This paper studies the impact of privacy policies on consumer data-sharing behavior, focusing on policy changes in California and Virginia that took effect in 2023. Using data from a leading customer engagement app in the United States, where users upload shopping... View Details
      Keywords: Privacy; Privacy Regulation; Data Sharing; Digital Platforms; Policy; Surveys; Behavior; Public Opinion; California; Virginia
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      Demirci, Ozge, Ayelet Israeli, and Eva Ascarza. "In Privacy We Trust: The Effect of Privacy Regulations on Data Sharing Behavior." Harvard Business School Working Paper, No. 26-001, July 2025.
      • 2025
      • Working Paper

      Rethinking Volume

      By: Philippe van der Beck, Lorenzo Bretscher and Zhiyu Julie Fu
      Gross trading volumes in financial markets are large and far exceed return volatility. In contrast, “net volume”—trading from persistent portfolio reallocations—is substantially lower, as it excludes transitory round-trip trades. This observation reveals a fundamental... View Details
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      van der Beck, Philippe, Lorenzo Bretscher, and Zhiyu Julie Fu. "Rethinking Volume." Harvard Business School Working Paper, No. 26-003, July 2025.
      • 2025
      • Working Paper

      Designing Consent: Choice Architecture and Consumer Welfare in Data Sharing

      By: Chiara Farronato, Audrey Fradkin and Tesary Lin
      We study the welfare consequences of choice architecture for online privacy using a field experiment that randomizes cookie consent banners. We study three ways in which firms or policymakers can influence choices: (1) nudging users through banner design to encourage... View Details
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      Farronato, Chiara, Audrey Fradkin, and Tesary Lin. "Designing Consent: Choice Architecture and Consumer Welfare in Data Sharing." NBER Working Paper Series, No. 34025, July 2025.
      • July–August 2025
      • Article

      Don’t Let an AI Failure Harm Your Brand

      By: Julian De Freitas
      How companies market their AI systems affects the repercussions they face when their products fail. Marketers must promote their AI products with potential failure in mind. To do that, they must first understand consumers’ unique attitudes toward AI. Marketers who... View Details
      Keywords: AI and Machine Learning; Brands and Branding; Product Marketing; Consumer Behavior; Attitudes
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      De Freitas, Julian. "Don’t Let an AI Failure Harm Your Brand." Harvard Business Review 103, no. 4 (July–August 2025): 126–133.
      • July 2025
      • Article

      Economic Integration and the Transmission of Democracy

      By: Marco Tabellini and Giacomo Magistretti
      In this paper, we study the effects of economic integration with democratic partners on democracy. We assemble a large country-level panel dataset from 1960 to 2015, and exploit improvements in air, relative to sea, transportation to derive a time-varying instrument... View Details
      Keywords: Democratization; Institutional Development; Economic Integration; International Trade; Democracy; Political Preferences; Institutions; Trade; Global Range; Economics; Government and Politics
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      Tabellini, Marco, and Giacomo Magistretti. "Economic Integration and the Transmission of Democracy." Review of Economic Studies 92, no. 4 (July 2025): 2765–2792. (Available also from VOX, VOXEU, Atlantico, The Economist, Domani, and Ideas for India. Longer NBER working paper version available here.)
      • 2025
      • Working Paper

      Sovereign Default and the Decline in Interest Rates

      By: Max Miller, James D. Paron and Jessica Wachter
      Sovereign debt yields have declined dramatically over the last half-century. Standard explanations, including aging populations and increases in asset demand from abroad, encounter difficulties when confronted with the full range of evidence. We propose an explanation... View Details
      Keywords: Inflation and Deflation; Interest Rates; Debt Securities
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      Miller, Max, James D. Paron, and Jessica Wachter. "Sovereign Default and the Decline in Interest Rates." NBER Working Paper Series, No. 34021, July 2025. (Revise and Resubmit, Review of Financial Studies.)
      • July 2025
      • Module Note

      Supply and Demand for Strategists

      By: Quan Le, Quan Le and Quan Le
      This module note introduces students to the foundational microeconomic principles of supply and demand. It uses the example of an aluminum plant (specifically, production quantity and shutdown decisions) to discuss short-run vs. long-run decisions, marginal costs, sunk... View Details
      Keywords: Business Exit or Shutdown; Business or Company Management; Business Strategy; Competition; Competitive Advantage; Cost of Capital; Cost vs Benefits; Decision Making; Decisions; Demand and Consumers; Economics; Economic Systems; For-Profit Firms; Market Entry and Exit; Market Participation; Markets; Metals and Minerals; Microeconomics; Price; Revenue; Strategy; Supply and Industry; Manufacturing Industry
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      Le, Quan. "Supply and Demand for Strategists." Harvard Business School Module Note 726-352, July 2025.
      • 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
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      Yang, Jeremy, and Ayelet Israeli. "Full-Funnel Advertising on TikTok: An Experiment." Harvard Business School Spreadsheet Supplement 525-721, June 2025.
      • 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
      Citation
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      Yang, Jeremy, and Ayelet Israeli. "Full-Funnel Advertising on TikTok: An Experiment." Harvard Business School Exercise 525-066, June 2025.
      • June 2025
      • Exercise

      Full-Funnel Advertising on TikTok: An Experiment (Solution)

      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
      Citation
      Related
      Yang, Jeremy, and Ayelet Israeli. "Full-Funnel Advertising on TikTok: An Experiment (Solution)." Harvard Business School Exercise 525-067, June 2025.
      • 2025
      • Working Paper

      Fiscal Externalities of Transaction Taxes: Evidence from the Los Angeles Mansion Tax

      By: Daniel Green, Vikram Jambulapati, Jack Liebersohn and Tejaswi Velayudhan
      We estimate the fiscal externalities of a property transfer tax, the Los Angeles “Mansion Tax”, on the revenues from property taxes when assessed values are closely tied to transactions. In California, as in over half of U.S. states, growth in tax as- sessments... View Details
      Keywords: Public Finance; Real Estate; Property Demand; Taxation; Property; Revenue; Los Angeles
      Citation
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      Green, Daniel, Vikram Jambulapati, Jack Liebersohn, and Tejaswi Velayudhan. "Fiscal Externalities of Transaction Taxes: Evidence from the Los Angeles Mansion Tax." SSRN Working Paper Series, No. 5273034, June 2025.
      • May–June 2025
      • Article

      Algorithmic Assortment Curation: An Empirical Study of Buybox in Online Marketplaces

      By: Santiago Gallino, Nil Karacaoglu and Antonio Moreno
      Most online sales worldwide take place in marketplaces that connect sellers and buyers. The presence of numerous third-party sellers leads to a proliferation of listings for each product, making it difficult for customers to choose between the available options. Online... View Details
      Keywords: Algorithms; Marketplaces; Marketplace Matching; E-commerce; Demand and Consumers; Customer Focus and Relationships; Market Participation; Technology Adoption
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      Gallino, Santiago, Nil Karacaoglu, and Antonio Moreno. "Algorithmic Assortment Curation: An Empirical Study of Buybox in Online Marketplaces." Manufacturing & Service Operations Management 27, no. 3 (May–June 2025): 917–934.
      • May–June 2025
      • Article

      Balancing Digital Safety and Innovation

      By: Tomomichi Amano and Tomomi Tanaka
      Designers of consumer-facing digital products have tended to focus on novelty and speed (“move fast and break things”). They’ve spent more effort on innovating than on anticipating how customers—and bad actors—might engage with products. But as digital products become... View Details
      Keywords: Technological Innovation; Cybersecurity; Demand and Consumers; Safety
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      Amano, Tomomichi, and Tomomi Tanaka. "Balancing Digital Safety and Innovation." Harvard Business Review 103, no. 3 (May–June 2025): 120–127.
      • Summer 2025
      • Article

      Dynamic Competition for Customer Memberships

      By: Cristian Chica, Julian Jimenez-Cardenas and Jorge Tamayo
      A competitive two-period membership (subscription) market is analyzed. Two symmetric firms charge a “membership” fee that allows consumers to buy products or services at a given unit price for both periods. Firms can choose between long- or short-term memberships. When... View Details
      Keywords: Competitive Price Discrimination; Membership; Dynamic Competition; Competition; Price; Consumer Behavior; Business Model
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      Chica, Cristian, Julian Jimenez-Cardenas, and Jorge Tamayo. "Dynamic Competition for Customer Memberships." Journal of Economics & Management Strategy 34, no. 2 (Summer 2025): 525–556.
      • June 2025
      • Article

      Ideation with Generative AI—In Consumer Research and Beyond

      By: Julian De Freitas, G. Nave and Stefano Puntoni
      The use of large language models (LLMs) in consumer research is rapidly evolving, with applications including synthetic data generation, data analysis, and more. However, their role in creative ideation—a cornerstone of consumer research—remains underexplored. Drawing... View Details
      Keywords: Large Language Model; AI and Machine Learning; Creativity; Innovation Strategy
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      De Freitas, Julian, G. Nave, and Stefano Puntoni. "Ideation with Generative AI—In Consumer Research and Beyond." Journal of Consumer Research 51, no. 1 (June 2025): 18–31.
      • June 2025
      • Article

      Who Benefits from Online Gig Economy Platforms?

      By: Christopher T. Stanton and Catherine Thomas
      Online labor platforms for short-term, remote work have many more job seekers than available jobs. Despite their relative abundance, workers capture a substantial share of the surplus from transactions. We draw this conclusion from demand estimates that imply workers'... View Details
      Keywords: Gig Economy; Knowledge Workers; Online Platforms; Job Search; Governing Rules, Regulations, and Reforms; Wages; Demand and Consumers
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      Stanton, Christopher T., and Catherine Thomas. "Who Benefits from Online Gig Economy Platforms?" American Economic Review 115, no. 6 (June 2025): 1857–1895.
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