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      • 2022
      • Article

      Which Corporate ESG News Does the Market React To?

      By: George Serafeim and Aaron Yoon
      Using a dataset that classifies firm-level ESG news as positive and negative, we examine how stock prices react to different types of ESG news. We analyze 111,020 firm-day observations for 3,126 companies and find that prices react only to issues identified as... View Details
      Keywords: ESG; ESG (Environmental, Social, Governance) Performance; ESG Ratings; Social Capital; Environment; Sustainability; CSR; Stock Price; Stock Market Expectations; Materiality; Market Reaction; Environmental Sustainability; Governance; Social Issues; Performance; News
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      Serafeim, George, and Aaron Yoon. "Which Corporate ESG News Does the Market React To?" Financial Analysts Journal 78, no. 1 (2022): 59–78.
      • 2022
      • Working Paper

      Addressing Vaccine Hesitancy: Experimental Evidence from Nine Countries during the COVID-19 Pandemic

      By: Vincenzo Galasso, Vincent Pons, Paola Profeta, Michael Becher, Sylvain Brouard and Martial Foucault
      Millions of people refuse COVID-19 vaccination. Using original data from two surveys in nine OECD countries, we analyze the determinants of anti-vax intentions in December 2020 and show that half of the anti-vax individuals were vaccinated by summer 2021. Vaccinations... View Details
      Keywords: COVID-19; Vaccination; Vaccine Hesitancy; Information Campaigns; Health Pandemics; Behavior; Information
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      Galasso, Vincenzo, Vincent Pons, Paola Profeta, Michael Becher, Sylvain Brouard, and Martial Foucault. "Addressing Vaccine Hesitancy: Experimental Evidence from Nine Countries during the COVID-19 Pandemic." NBER Working Paper Series, No. 29741, February 2022.
      • 2024
      • Working Paper

      What Triggers National Stock Market Jumps?

      By: Scott R. Baker, Nicholas Bloom, Steven J. Davis and Marco Sammon
      We examine newspapers the day after major stock-market jumps to evaluate the proximate cause, geographic source, and clarity of these events from 1900 in the US, 1930 in the UK and 1980 in 12 other countries. We find four main results. First, the United States plays an... View Details
      Keywords: Uncertainty; Policy Uncertainty; Stock Market; Financial Markets; Volatility; Risk and Uncertainty; Policy; Newspapers
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      Baker, Scott R., Nicholas Bloom, Steven J. Davis, and Marco Sammon. "What Triggers National Stock Market Jumps?" Working Paper, December 2024.
      • February 2022
      • Article

      Client Concerns about Information Spillovers from Sharing Audit Partners

      By: Jung Koo Kang, Clive Lennox and Vivek Pandey
      We hypothesize that companies in the same product market avoid sharing the same audit partner when they are concerned about possible information spillovers. Consistent with our hypothesis, we find that product market rivals are less likely to share the same partner... View Details
      Keywords: Information Spillovers; Audit Partners; Proprietary Costs; Product Market Rivals; Audit Fee; Audit Quality; Information; Accounting Audits
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      Kang, Jung Koo, Clive Lennox, and Vivek Pandey. "Client Concerns about Information Spillovers from Sharing Audit Partners." Art. 101434. Journal of Accounting & Economics 73, no. 1 (February 2022).
      • January 2022
      • Article

      Global Behaviors, Perceptions, and the Emergence of Social Norms at the Onset of the COVID-19 Pandemic

      By: Lukas Hensel, Marc Witte, Stefano Caria, Thiemo Fetzer, Stefano Fiorin, Friedrich M. Goetz, Margarita Gomez, Johannes Haushofer, Andriy Ivchenko, Gordon T. Kraft-Todd, Elena Reutskaja, Christopher Roth, Erez Yoeli and Jon M. Jachimowicz
      We conducted a large-scale survey covering 58 countries and over 100,000 respondents between late March and early April 2020 to study beliefs and attitudes towards citizens' and governments' responses at the onset of the COVID-19 pandemic. Most respondents reported... View Details
      Keywords: COVID-19; Government Regulation; Social Norms; Health Pandemics; Governing Rules, Regulations, and Reforms; Behavior; Perception; Global Range; Surveys
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      Hensel, Lukas, Marc Witte, Stefano Caria, Thiemo Fetzer, Stefano Fiorin, Friedrich M. Goetz, Margarita Gomez, Johannes Haushofer, Andriy Ivchenko, Gordon T. Kraft-Todd, Elena Reutskaja, Christopher Roth, Erez Yoeli, and Jon M. Jachimowicz. "Global Behaviors, Perceptions, and the Emergence of Social Norms at the Onset of the COVID-19 Pandemic." Journal of Economic Behavior & Organization 193 (January 2022): 473–496.
      • December 2021
      • Article

      Cash-for-Information Whistleblower Programs: Effects on Whistleblowing and Consequences for Whistleblowers

      By: Aiyesha Dey, Jonas Heese and Gerardo Pérez Cavazos
      We study the effect of financial incentives on whistleblowing and the consequences for whistleblowers under the cash-for-information program of the False Claims Act (FCA). Exploiting appeals-court decisions that increase financial incentives for whistleblowing, we find... View Details
      Keywords: Whistleblowers; Cash-for-information Whistleblower Programs; False Claims Act; Corporate Misconduct; Consequences For Whistleblowers; Crime and Corruption; Information; Cost
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      Dey, Aiyesha, Jonas Heese, and Gerardo Pérez Cavazos. "Cash-for-Information Whistleblower Programs: Effects on Whistleblowing and Consequences for Whistleblowers." Journal of Accounting Research 59, no. 5 (December 2021): 1689–1740.
      • December 2021
      • Article

      Left- and Right-Leaning News Organizations Use Negative Emotional Content and Elicit User Engagement Similarly

      By: Andrea Bellovary, Nathaniel Young and Amit Goldenberg
      Negativity has historically dominated news content; however, little research has examined how news organizations use affect on social media, where content is generally positive. In the current project we ask a few questions: Do news organizations on Twitter use... View Details
      Keywords: Negative Press; Twitter; Political Affiliation; Affect; News; Media; Internet and the Web; Emotions; Perspective; Social Media
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      Bellovary, Andrea, Nathaniel Young, and Amit Goldenberg. "Left- and Right-Leaning News Organizations Use Negative Emotional Content and Elicit User Engagement Similarly." Affective Science 2, no. 4 (December 2021): 391–396.
      • 2022
      • Working Paper

      ESG: Hyperboles and Reality

      By: George Serafeim
      ESG has rapidly become a household name leading to both confusion about what it means and creating unrealistic expectations about its effects. In this paper, I draw on more than a decade of research to dispel several myths about ESG and provide answers to important... View Details
      Keywords: ESG; ESG (Environmental, Social, Governance) Performance; ESG Disclosure; ESG Reporting; ESG Ratings; Sustainability; Corporate Social Responsibility and Impact; Environmental Sustainability; Performance; Corporate Disclosure; Reports
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      Serafeim, George. "ESG: Hyperboles and Reality." Harvard Business School Working Paper, No. 22-031, November 2021.
      • November 2021
      • Article

      Borrower Leakage from Costly Screening: Evidence from SME Lending in Peru

      By: Irani Arraiz, Miriam Bruhn, Benjamin N. Roth, Claudia Ruiz-Ortega and Rodolfo Stucchi
      We provide evidence that commercial lenders in Peru suffer leakages in their loan approval process. Leveraging a discontinuity in the loan approval process of a large bank, we find that receiving a loan approval from the bank causes loan applicants to receive offers... View Details
      Keywords: Information Spillovers; SME Lending; Financial Inclusion; Banks and Banking; Financing and Loans; Small Business; Information; Peru
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      Arraiz, Irani, Miriam Bruhn, Benjamin N. Roth, Claudia Ruiz-Ortega, and Rodolfo Stucchi. "Borrower Leakage from Costly Screening: Evidence from SME Lending in Peru." Journal of Development Economics 153 (November 2021).
      • November 2021
      • Article

      Venture Capitalists and COVID-19

      By: Paul A. Gompers, Will Gornall, Steven N. Kaplan and Ilya A. Strebulaev
      We survey over 1,000 institutional and corporate venture capitalists (VCs) at more than 900 different firms to learn how their decisions and investments have been affected by the COVID-19 pandemic. We compare their survey answers to those provided by a large sample of... View Details
      Keywords: Investment Decisions; COVID-19 Pandemic; Impact; Health Pandemics; Venture Capital; Investment; Decision Making; Surveys
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      Gompers, Paul A., Will Gornall, Steven N. Kaplan, and Ilya A. Strebulaev. "Venture Capitalists and COVID-19." Journal of Financial and Quantitative Analysis 56, no. 7 (November 2021).
      • October 2021
      • Article

      Shareholder Activism and Firms' Voluntary Disclosure of Climate Change Risks

      By: Caroline Flammer, Michael W. Toffel and Kala Viswanathan
      This paper examines whether—in the absence of mandated disclosure requirements—shareholder activism can elicit greater disclosure of firms’ exposure to climate change risks. We find that environmental shareholder activism increases the voluntary disclosure of climate... View Details
      Keywords: Transparency; Reporting; Shareholder Engagement; Shareholder Activism; Climate Change; Risk and Uncertainty; Environmental Management; Investment Activism; Corporate Disclosure; Communication Strategy; Information Publishing; Measurement and Metrics; Corporate Social Responsibility and Impact; Problems and Challenges; United States
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      Flammer, Caroline, Michael W. Toffel, and Kala Viswanathan. "Shareholder Activism and Firms' Voluntary Disclosure of Climate Change Risks." Strategic Management Journal 42, no. 10 (October 2021): 1850–1879. (Featured in Harvard Business Review.)
      • Summer 2021
      • Article

      Predictable Country-level Bias in the Reporting of COVID-19 Deaths

      By: Botir Kobilov, Ethan Rouen and George Serafeim
      We examine whether a country’s management of the COVID-19 pandemic relate to the downward biasing of the number of reported deaths from COVID-19. Using deviations from historical averages of the total number of monthly deaths within a country, we find that the... View Details
      Keywords: COVID-19; Deaths; Reporting; Incentives; Government Policy; Health Pandemics; Health Care and Treatment; Country; Crisis Management; Outcome or Result; Reports; Policy
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      Kobilov, Botir, Ethan Rouen, and George Serafeim. "Predictable Country-level Bias in the Reporting of COVID-19 Deaths." Journal of Government and Economics 2 (Summer 2021).
      • July 2021 (Revised July 2022)
      • Case

      Brigham & Women's Hospital: Using Patient Reported Outcomes to Improve Breast Cancer Care

      By: Robert S. Kaplan, Navraj S. Nagra and Syed S. Shehab
      Dr. Andrea Pusic, breast cancer reconstruction surgeon, wants to extend outcomes measurement beyond traditional surgical metrics of infections, complications, and survival rates. The case describes her development of a new mobile phone app, which collects patients’... View Details
      Keywords: Health Care and Treatment; Outcome or Result; Cost Management; Activity Based Costing and Management; Mobile and Wireless Technology; Health Testing and Trials; Surveys; Health Industry; Boston
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      Kaplan, Robert S., Navraj S. Nagra, and Syed S. Shehab. "Brigham & Women's Hospital: Using Patient Reported Outcomes to Improve Breast Cancer Care." Harvard Business School Case 122-010, July 2021. (Revised July 2022.)
      • July 2021
      • Article

      Information Transparency, Multihoming, and Platform Competition: A Natural Experiment in the Daily Deals Market

      By: Hui Li and Feng Zhu
      Platform competition is shaped by the likelihood of multi-homing (i.e., complementors or consumers adopt more than one platform). To take advantage of multi-homing, platform firms often attempt to motivate their rivals’ high-performing complementors to adopt their own... View Details
      Keywords: Platform Competition; Multi-homing; Information Transparency; Daily Deals; Groupon; LivingSocial; Digital Platforms; Information; Competition
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      Li, Hui, and Feng Zhu. "Information Transparency, Multihoming, and Platform Competition: A Natural Experiment in the Daily Deals Market." Management Science 67, no. 7 (July 2021): 4384–4407.
      • 2021
      • Working Paper

      Public Disclosure of Private Meetings: Does Observing Peers' Information Acquisition Affect Analysts' Attention Allocation?

      By: Yi Ru, Ronghuo Zheng and Yuan Zou
      We investigate the impact of observing peers’ information acquisition on financial analysts’ attention allocation. Using the timely disclosure mandate by the Shenzhen Stock Exchange as a setting, we find that, when analysts can observe that a firm is visited by other... View Details
      Keywords: Attention Allocation; Informational Efficiency; Corporate Site Visits; Externalities; Information; Acquisition; Corporate Disclosure; Outcome or Result
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      Ru, Yi, Ronghuo Zheng, and Yuan Zou. "Public Disclosure of Private Meetings: Does Observing Peers' Information Acquisition Affect Analysts' Attention Allocation?" Harvard Business School Working Paper, No. 22-064, July 2021.
      • May 2021
      • Article

      The Firm Next Door: Using Satellite Images to Study Local Information Advantage

      By: Jung Koo Kang, Lorien Stice-Lawrence and Forester Wong
      We use novel satellite data that track the number of cars in the parking lots of 92,668 stores for 71 publicly listed U.S. retailers to study the local information advantage of institutional investors. We establish car counts as a timely measure of store-level... View Details
      Keywords: Satellite Images; Store-level Performance; Institutional Investors; Local Advantage; Overweighting; Processing Costs; Alternative Data; Big Data; Emerging Technologies; Information; Quality; Institutional Investing; Decision Making; Behavioral Finance; Analytics and Data Science
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      Kang, Jung Koo, Lorien Stice-Lawrence, and Forester Wong. "The Firm Next Door: Using Satellite Images to Study Local Information Advantage." Journal of Accounting Research 59, no. 2 (May 2021): 713–750.
      • April 17, 2021
      • Article

      Reimagining India's Health System: A Lancet Citizens' Commission

      By: Vikram Patel, Kiran Mazumdar-Shaw, Gagandeep Kang, Pamela Das and Tarun Khanna
      This commentary announces the launch of the Lancet Citizens’ Commission on Reimagining India’s Health System. The Commission is an ambitious, cross-sectoral effort to develop a citizens’ roadmap to achieving universal health coverage (UHC) in India in the next decade.... View Details
      Keywords: Universal Health Coverage; Health Care and Treatment; Reports; India
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      Patel, Vikram, Kiran Mazumdar-Shaw, Gagandeep Kang, Pamela Das, and Tarun Khanna. "Reimagining India's Health System: A Lancet Citizens' Commission." Lancet 397, no. 10283 (April 17, 2021). (Comment.)
      • April 2021
      • Article

      Homing and Platform Responses to Entry: Historical Evidence from the U.S. Newspaper Industry

      By: K. Francis Park, Robert Seamans and Feng Zhu
      We examine how heterogeneity in customers’ tendencies to single-home or multi-home affects a platform’s competitive responses to new entrants in the market. We first develop a formal model to generate predictions about how a platform will respond. We then empirically... View Details
      Keywords: Single-homing; Multi-homing; Platform Responses; Newpaper; Television; Digital Platforms; Market Entry and Exit; Newspapers; Television Entertainment; History; Journalism and News Industry; Media and Broadcasting Industry
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      Park, K. Francis, Robert Seamans, and Feng Zhu. "Homing and Platform Responses to Entry: Historical Evidence from the U.S. Newspaper Industry." Strategic Management Journal 42, no. 4 (April 2021): 684–709.
      • February 2021
      • Case

      Digital Manufacturing at Amgen

      By: Shane Greenstein, Kyle R. Myers and Sarah Mehta
      This case discusses efforts made by biotechnology (biotech) company Amgen to introduce digital technologies into its manufacturing processes. Doing so is complicated by the fact that the process for manufacturing biologics—or therapeutics made from living cells—is... View Details
      Keywords: Digital Technologies; Change; Change Management; Decision Making; Cost vs Benefits; Decisions; Information; Analytics and Data Science; Innovation and Invention; Innovation and Management; Innovation Leadership; Innovation Strategy; Technological Innovation; Jobs and Positions; Knowledge; Leadership; Organizational Culture; Science; Strategy; Information Technology; Technology Adoption; Biotechnology Industry; Pharmaceutical Industry; United States; California; Puerto Rico; Rhode Island
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      Greenstein, Shane, Kyle R. Myers, and Sarah Mehta. "Digital Manufacturing at Amgen." Harvard Business School Case 621-008, February 2021.
      • 2021
      • Working Paper

      Connecting Expected Stock Returns to Accounting Valuation Multiples: A Primer

      By: Akash Chattopadhyay, Matthew R. Lyle and Charles C.Y. Wang
      We outline a framework in which accounting “valuation anchors" could be connected to expected stock returns. Under two general conditions, expected log returns is a log-linear function of a valuation (market value-to-accounting) multiple and the expected growth in the... View Details
      Keywords: Expected Returns; Present Value; Investment Return; Accounting; Valuation; Information; Framework
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      Chattopadhyay, Akash, Matthew R. Lyle, and Charles C.Y. Wang. "Connecting Expected Stock Returns to Accounting Valuation Multiples: A Primer." Harvard Business School Working Paper, No. 21-081, January 2021.
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