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- All HBS Web
(436)
- News (75)
- Research (290)
- Multimedia (4)
- Faculty Publications (165)
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- 13 Mar 2017
- Working Paper Summaries
Why and How Investors Use ESG Information: Evidence from a Global Survey
Keywords: by Amir Amel-Zadeh and George Serafeim
- 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
Serafeim, George, and Aaron Yoon. "Which Corporate ESG News Does the Market React To?" Financial Analysts Journal 78, no. 1 (2022): 59–78.
- March 2016 (Revised April 2019)
- Technical Note
ESG Metrics: Reshaping Capitalism?
By: George Serafeim
In the past twenty-five years, the world had seen an exponential growth in the number of companies reporting environmental, social and governance (ESG) data. Investor interest in ESG data also grew rapidly. A growing belief that increasing levels of social inequality... View Details
Keywords: Capitalism; Sustainability; Accountability; Corporate Social Responsibility; Responsibilities To Society; Environment; Social Impact Investment; ESG; Corporate Social Responsibility and Impact; Environmental Sustainability; Measurement and Metrics; Integrated Corporate Reporting; Corporate Accountability; Accounting; Economic Systems
Serafeim, George, and Jody Grewal. "ESG Metrics: Reshaping Capitalism?" Harvard Business School Technical Note 116-037, March 2016. (Revised April 2019.)
- 2021
- Working Paper
How to Fix ESG Reporting
By: Robert S. Kaplan and Karthik Ramanna
Investors, advocacy groups, academics, and the 200 CEOs of the US Business Roundtable have asked corporations to take on an added purpose beyond a narrow pursuit of shareholder value. In response, many companies now issue ESG (Environmental, Societal, and Governance)... View Details
Keywords: ESG Reporting; Sustainability; Corporate Purpose; Greenhouse Gas; Activity-Based Costing; Environmental Sustainability; Environmental Management; Corporate Social Responsibility and Impact; Measurement and Metrics; Goals and Objectives; Agreements and Arrangements; Corporate Accountability
Kaplan, Robert S., and Karthik Ramanna. "How to Fix ESG Reporting." Harvard Business School Working Paper, No. 22-005, July 2021.
- 09 Aug 2016
- Working Paper Summaries
Shareholder Activism on Sustainability Issues
- 04 Dec 2019
- Working Paper Summaries
Pathways to Materiality: How Sustainability Issues Become Financially Material to Corporations and Their Investors
Keywords: by Jean Rogers and George Serafeim
- Article
Human Capital and the Future of Work: Implications for Investors and ESG Integration
By: Sakis Kotsantonis and George Serafeim
Human capital development (HCD) is a key consideration for most companies, but only recently have investors focused on understanding the risks and opportunities related to human capital with the emergence of environmental, social, and governance (ESG) investment... View Details
Keywords: Future Of Work; ESG; Employee Engagement; Employee Compensation; Human Capital; Human Resources; Employees; Compensation and Benefits; Wages
Kotsantonis, Sakis, and George Serafeim. "Human Capital and the Future of Work: Implications for Investors and ESG Integration." Journal of Financial Transformation 51 (April 2020): 115–130.
- June 2024 (Revised January 2025)
- Background Note
Politics Comes to ESG Investing
By: Shawn Cole and Jonah Zahnd
While the past decade has seen a dramatic increase in the incorporation of Environmental, Social and Governance (ESG) standards into investor practices, this momentum has shifted recently in the United States, as some politicians argued that ESG investing practices... View Details
Cole, Shawn, and Jonah Zahnd. "Politics Comes to ESG Investing." Harvard Business School Background Note 224-107, June 2024. (Revised January 2025.)
- 2016
- Working Paper
Shareholder Activism on Sustainability Issues
By: Jody Grewal, George Serafeim and Aaron Yoon
Shareholder activism on sustainability issues has become increasingly prevalent over the years, with the number of proposals filed doubling from 1999 to 2013. We use recent innovations in accounting standard setting to classify 2,665 shareholder proposals that address... View Details
Keywords: Sustainability; Activism; Activist Investors; Activist Shareholder; Corporate Social Responsibility; Environment; Corporate Performance; Corporate Accountability; Corporate Social Responsibility and Impact; Performance; Environmental Sustainability; Corporate Governance; Business and Shareholder Relations; Investment Activism
Grewal, Jody, George Serafeim, and Aaron Yoon. "Shareholder Activism on Sustainability Issues." Harvard Business School Working Paper, No. 17-003, July 2016.
- 2020
- Working Paper
The ESG-Innovation Disconnect: Evidence from Green Patenting
By: Lauren Cohen, Umit G. Gurun and Quoc H. Nguyen
No firm or sector of the global economy is untouched by innovation. In equilibrium, innovators will flock to (and innovation will occur where) the returns to innovative capital are the highest. In this paper, we document a strong empirical pattern in green patent... View Details
Keywords: ESG (Environmental, Social, Governance) Performance; Investment; Decision Making; Policy; Energy; Green Technology; Technological Innovation; Patents
Cohen, Lauren, Umit G. Gurun, and Quoc H. Nguyen. "The ESG-Innovation Disconnect: Evidence from Green Patenting." NBER Working Paper Series, No. 27990, October 2020. (Winner of the Fordham University Gabelli School of Business – PVH Corp. Global Thought Leadership Grant on Corporate Social Responsibility, 2020.)
- August 2020
- Background Note
US Private Equity Firms: ESG and Impact (B)
By: Lynn S. Paine and Holly Fetter
This is the second part of a two-part note. The first part (A) explores how US private equity firms are incorporating ESG (Environmental, Social, & Governance) factors and impact objectives into their investment strategies and firm practices. It is based on publicly... View Details
Keywords: Private Equity; Corporate Social Responsibility and Impact; Social Issues; Financial Services Industry; United States
Paine, Lynn S., and Holly Fetter. "U.S. Private Equity Firms: ESG and Impact (B)." Harvard Business School Background Note 321-037, August 2020.
- 2020
- Article
Public Sentiment and the Price of Corporate Sustainability
By: George Serafeim
Combining corporate sustainability performance scores based on environmental, social, and governance (ESG) data with big data measuring public sentiment about a company’s sustainability performance, I find that the valuation premium paid for companies with strong... View Details
Keywords: Sustainability; ESG; ESG (Environmental, Social, Governance) Performance; Investment Management; Investment Strategy; Big Data; Machine Learning; Environment; Environmental Sustainability; Corporate Governance; Performance; Asset Pricing; Investment; Management; Strategy; Human Capital; Public Opinion; Value; Analytics and Data Science
Serafeim, George. "Public Sentiment and the Price of Corporate Sustainability." Financial Analysts Journal 76, no. 2 (2020): 26–46.
- 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
Serafeim, George. "ESG: Hyperboles and Reality." Harvard Business School Working Paper, No. 22-031, November 2021.
- August 2020
- Background Note
US Private Equity Firms: ESG and Impact (A)
By: Lynn S. Paine and Holly Fetter
This Note has two parts. The first part (A) explores how U.S. private equity firms are incorporating ESG (Environmental, Social, & Governance) factors and impact objectives into their investment strategies and firm practices. It is based on publicly available... View Details
Keywords: Private Equity; Corporate Social Responsibility and Impact; Social Issues; Financial Services Industry; United States
Paine, Lynn S., and Holly Fetter. "U.S. Private Equity Firms: ESG and Impact (A)." Harvard Business School Background Note 321-036, August 2020.
- September–October 2020
- Article
Social-Impact Efforts That Create Real Value
By: George Serafeim
Until the mid-2010s few investors paid attention to environmental, social, and governance (ESG) data—information about companies’ carbon footprints, labor policies, board makeup, and so forth. Today the data is widely used by investors. How can organizations create... View Details
Keywords: Sustainability; Sustainability Management; ESG; ESG (Environmental, Social, Governance) Performance; ESG Disclosure; ESG Disclosure Metrics; ESG Ratings; ESG Reporting; Social Impact; Impact Measurement; Social Innovation; Purpose; Corporate Purpose; Corporate Social Responsibility; Strategy; Social Enterprise; Society; Accounting; Investment; Environmental Sustainability; Climate Change; Corporate Strategy; Mission and Purpose; Corporate Social Responsibility and Impact; Financial Services Industry; Chemical Industry; Technology Industry; Consumer Products Industry; Pharmaceutical Industry; North America; Europe; Japan; Australia
Serafeim, George. "Social-Impact Efforts That Create Real Value." Harvard Business Review 98, no. 5 (September–October 2020): 38–48.
- Summer 2025
- Article
Are ESG Improvements Recognized? Perspectives from the Public Sentiments
By: Shaolong Wu
While Environment, Social, and Governance (ESG) increasingly guides investment management and corporate agendas nowadays, public reactions to firms' ESG performance remain under-studied. This paper fills this gap by investigating whether the public picks up firms' ESG... View Details
Keywords: Corporate Social Responsibility and Impact; Public Opinion; Environmental Sustainability; Corporate Governance; Investment
Wu, Shaolong. "Are ESG Improvements Recognized? Perspectives from the Public Sentiments." Journal of Impact and ESG Investing 5, no. 4 (Summer 2025): 24–51.
- 2022
- Working Paper
The Issuance and Design of Sustainability-linked Loans
By: Maria Loumioti and George Serafeim
Sustainability-linked loans (i.e., syndicated loans for which pricing is linked to a sustainability performance indicator) have rapidly evolved into a significant private debt product. We find that sustainability-linked lending has been available mostly to borrowers... View Details
Keywords: Sustainability; Sustainability Management; Credit Products; Loan Contracts; Loans; Corporate Finance; Credit Risk; Environment; ESG; ESG Ratings; Climate Change; Finance; Borrowing and Debt; Risk and Uncertainty; Credit
Loumioti, Maria, and George Serafeim. "The Issuance and Design of Sustainability-linked Loans." Harvard Business School Working Paper, No. 23-027, November 2022.
- September – October 2011
- Article
The Rise and Consequences of Corporate Sustainability Reporting
By: Ioannis Ioannou and George Serafeim
For many decades the cornerstone of corporate reporting has been financial information that is presented in a company's annual, semi-annual, and quarterly reports. These comprehensive financial reports—required by law for public companies in most countries... View Details
Keywords: Sustainability; ESG Reporting; Governing Rules, Regulations, and Reforms; Annual Reports; Operations; Strategy; Business and Shareholder Relations; Business and Stakeholder Relations; Performance; Business Model; Corporate Social Responsibility and Impact; Corporate Disclosure
Ioannou, Ioannis, and George Serafeim. "The Rise and Consequences of Corporate Sustainability Reporting." European Business Review (September–October 2011): 38–41.
- 2025
- Working Paper
Impact Investing and Worker Outcomes
By: Josh Lerner, Markus Lithell and Gordon M. Phillips
Impact investors claim to distinguish themselves from traditional venture capital and growth
equity investors by also pursuing environmental, social, and governance (ESG) objectives.
Whether they successfully do so in practice is unclear. We use confidential Census... View Details
Lerner, Josh, Markus Lithell, and Gordon M. Phillips. "Impact Investing and Worker Outcomes." Harvard Business School Working Paper, No. 25-040, February 2025. (Revised May 2025.)
- October 2017 (Revised October 2022)
- Case
JetBlue: Relevant Sustainability Leadership
By: George Serafeim
In 2017, JetBlue, the airline founded on the mission to “bring humanity back to air travel,” was considering becoming one of the first companies to report its sustainability performance according to the Sustainability Accounting Standards Board (SASB) standards. SASB... View Details
Keywords: Sustainability; Metrics; Leadership And Change Management; Airlines; Innovation; Purpose; ESG; ESG (Environmental, Social, Governance) Performance; Sustainability Reporting; Change Management; Leadership; Financial Reporting; Environmental Sustainability; Mission and Purpose; Reports; Competitive Strategy; Measurement and Metrics; Corporate Social Responsibility and Impact; Air Transportation Industry; United States
Serafeim, George, and David Freiberg. "JetBlue: Relevant Sustainability Leadership (A)." Harvard Business School Case 118-030, October 2017. (Revised October 2022.)