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- September 2023
- Article
Stock Price Reactions to ESG News: The Role of ESG Ratings and Disagreement
By: George Serafeim and Aaron Yoon
We investigate whether ESG ratings predict future ESG news and the associated market reactions. We find that the consensus rating predicts future news, but its predictive ability diminishes for firms with large disagreement between raters. Relation between news and... View Details
Keywords: ESG; ESG (Environmental, Social, Governance) Performance; ESG Disclosure; ESG Ratings; ESG Reporting; ESG Disclosure Metrics; Sustainability; Investments; Disagreement; Rating Disagreement; Ratings; Environmental Sustainability; Social Issues; Corporate Social Responsibility and Impact; Performance; News; Investment; Financial Markets; Stocks; Price
Serafeim, George, and Aaron Yoon. "Stock Price Reactions to ESG News: The Role of ESG Ratings and Disagreement." Special Issue on RAST 2022 Conference. Review of Accounting Studies 28, no. 3 (September 2023): 1500–1530.
- January 2022
- Article
Why is Corporate Virtue in the Eye of The Beholder? The Case of ESG Ratings
By: Dane Christensen, George Serafeim and Anywhere Sikochi
Despite the rising use of environmental, social, and governance (ESG) ratings, there is substantial disagreement across rating agencies regarding what rating to give to individual firms. As what drives this disagreement is unclear, we examine whether a firm’s ESG... View Details
Keywords: ESG Ratings; Rating Agency Disagreement; ESG Disclosure; Corporate Social Responsibility; Sustainability; Corporate Social Responsibility and Impact; Environmental Sustainability; Corporate Disclosure
Christensen, Dane, George Serafeim, and Anywhere Sikochi. "Why Is Corporate Virtue in the Eye of the Beholder? The Case of ESG Ratings." Accounting Review 97, no. 1 (January 2022): 147–175.
- September 7, 2020
- Article
Where ESG Ratings Fail: The Case for New Metrics
By: Mark R. Kramer, Nina Jais, Erin E. Sullivan, Carina Wendell, Kerry Rodriguez, Carlo Papa, Carlo Napoli and Filippo Forti
One agency’s A+ is another’s “laggard” — and neither links to financial performance. Hybrid metrics will change everything, argue Harvard Business School’s Mark Kramer and leaders in the shared-value movement. View Details
Keywords: ESG Ratings; Shared Value; Integrated Corporate Reporting; Performance; Measurement and Metrics
Kramer, Mark R., Nina Jais, Erin E. Sullivan, Carina Wendell, Kerry Rodriguez, Carlo Papa, Carlo Napoli, and Filippo Forti. "Where ESG Ratings Fail: The Case for New Metrics." Institutional Investor (September 7, 2020).
- January 2024 (Revised May 2024)
- Case
PortageBay and ESG Analytics
By: Vikram S. Gandhi and Radhika Kak
In 2023, sustainable investors faced several challenges. The first was the lack of access to standardized and vetted environmental, social, and governance (ESG) data, and equally, the interpretation of this data into investment-useful insights. Reducing reliance on... View Details
Keywords: ESG Ratings; Investment Funds; Governance; Environmental Sustainability; Corporate Social Responsibility and Impact
Gandhi, Vikram S., and Radhika Kak. "PortageBay and ESG Analytics." Harvard Business School Case 324-065, January 2024. (Revised May 2024.)
- 09 Mar 2021
- Working Paper Summaries
Stock Price Reactions to ESG News: The Role of ESG Ratings and Disagreement
- September 20, 2024
- Article
It’s Time to Unbundle ESG
By: Aaron K. Chatterji and Michael W. Toffel
ESG is at an inflection point. It has come to represent a broad and inchoate aspiration for what business should be doing beyond maximizing shareholder value. With ESG advocates on the defensive, business leaders need a new roadmap to determine which factors to... View Details
Keywords: ESG; ESG (Environmental, Social, Governance) Performance; ESG Ratings; ESG Reporting; ESG Disclosure; Sustainability; Climate; Climate Finance; Climate Risk; Social Accounting; Investment; Governance; Safety; Climate Change; Environmental Sustainability; Corporate Social Responsibility and Impact; Financial Services Industry
Chatterji, Aaron K., and Michael W. Toffel. "It’s Time to Unbundle ESG." Harvard Business Review (website) (September 20, 2024).
- Editorial
Why ESG Funds Fail to Scale
By: Gabriel Karageorgiou and George Serafeim
You’ve seen the headlines about the growth in environmental, social, and governance funds. Many investment professionals might read these and believe that launching a new ESG investment firm or ESG offering will be an automatic success. Our analysis of the data shows... View Details
Keywords: ESG; ESG (Environmental, Social, Governance) Performance; ESG Disclosure; ESG Disclosure Metrics; ESG Ratings; ESG Reporting; Investment Management; Investment Strategy; Investments; Investment Fund; Sustainability; Sustainable Finance; Sustainable Investing; Investment; Management; Strategy; Investment Portfolio; Finance; Growth and Development; Failure
Karageorgiou, Gabriel, and George Serafeim. "Why ESG Funds Fail to Scale." Institutional Investor (January 11, 2021).
- 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.
- September 2023
- Teaching Note
Roche: ESG and Access to Healthcare
By: George Serafeim
Teaching Note for HBS Case No. 123-075. In May 2022, Roche Group, one of the largest healthcare companies in the world, hosted its first ESG investor event focused exclusively on its efforts to impact access to healthcare. While Roche had recently set an ambitious goal... View Details
- March 2023
- Case
Roche: ESG and Access to Healthcare
By: George Serafeim, Susanna Gallani and Benjamin Maletta
In May 2022, Roche Group, one of the largest healthcare companies in the world, hosted its first ESG investor event focused exclusively on its efforts to impact access to healthcare. While Roche had recently set an ambitious goal to double the number of patients that... View Details
Keywords: ESG (Environmental, Social, Governance) Performance; Sustainable Finance; Growth Strategy And Execution; Sustainability Targets; Impact Evaluation; Healthcare Access; Healthcare Innovation; Healthcare Systems; Healthcare Operations; Finance; Strategy; Health Testing and Trials; Health Care and Treatment; Growth Management; Measurement and Metrics; Innovation Strategy; Corporate Social Responsibility and Impact; Health Industry; Pharmaceutical Industry; Switzerland; North America; Europe; Asia; Latin America; Africa
Serafeim, George, Susanna Gallani, and Benjamin Maletta. "Roche: ESG and Access to Healthcare." Harvard Business School Case 123-075, March 2023.
- June 2023
- Supplement
Roche: ESG and Access to Healthcare
By: George Serafeim
In May 2022, Roche Group, one of the largest healthcare companies in the world, hosted its first ESG investor event focused exclusively on its efforts to impact access to healthcare. While Roche had recently set an ambitious goal to double the number of patients that... View Details
Keywords: ESG (Environmental, Social, Governance) Performance; Sustainable Finance; Growth Strategy And Execution; Sustainability Targets; Impact Evaluation; Healthcare Access; Healthcare Innovation; Healthcare Systems; Healthcare Operations; Finance; Strategy; Health Testing and Trials; Health Care and Treatment; Growth Management; Measurement and Metrics; Innovation Strategy; Corporate Social Responsibility and Impact; Health Industry; Pharmaceutical Industry; Switzerland; North America; Europe; Asia; Latin America; Africa
Serafeim, George. "Roche: ESG and Access to Healthcare." Harvard Business School Multimedia/Video Supplement 123-713, June 2023.
- 2022
- Working Paper
ESG Performance and Voluntary ESG Disclosure: Mind the (Gender Pay) Gap
By: June Huang and Shirley Lu
We study if firms with better ESG performance are more likely to provide voluntary ESG disclosure, an assumption embedded in many ESG ratings. We focus on gender diversity and proxy for performance using a firm's gender pay gap ("GPG") disclosed under a UK disclosure... View Details
Huang, June, and Shirley Lu. "ESG Performance and Voluntary ESG Disclosure: Mind the (Gender Pay) Gap." SSRN Working Paper Series, No. 3708257, May 2022.
- 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.
- 2023
- Working Paper
ESG: From Process to Product
By: George Serafeim
ESG measurement, analysis, management, and communication is a process that the financial industry has turned into a product, resulting in many investment funds using the ESG label. This has caused confusion, generating demand for a framework that defines... View Details
Keywords: ESG; ESG (Environmental, Social, Governance) Performance; ESG Ratings; ESG Reporting; Investment Fund; Investment; Corporate Social Responsibility and Impact; Financial Services Industry
Serafeim, George. "ESG: From Process to Product." Harvard Business School Working Paper, No. 23-069, May 2023.
- 2015
- Working Paper
Implied Materiality and Material Disclosures of Credit Ratings
By: Robert G. Eccles and Tim Youmans
This first of three papers in our series on materiality in credit ratings will examine the materiality of credit ratings from an "implied materiality" and governance disclosure perspective. In the second paper, we will explore the materiality of environmental, social,... View Details
Eccles, Robert G., and Tim Youmans. "Implied Materiality and Material Disclosures of Credit Ratings." Harvard Business School Working Paper, No. 15-079, April 2015.
- 2022
- Working Paper
The Evolution of ESG Reports and the Role of Voluntary Standards
By: Ethan Rouen, Kunal Sachdeva and Aaron Yoon
We examine the evolution of ESG reports of S&P 500 firms from 2010 to 2021. The
percentage of firms releasing these voluntary disclosures increased from 35% to 86%
during this period, although the length of these documents experienced more modest
growth. Using a... View Details
Keywords: Voluntary Disclosure; Textual Analysis; Modeling And Analysis; Corporate Social Responsibility and Impact; AI and Machine Learning; Accounting
Rouen, Ethan, Kunal Sachdeva, and Aaron Yoon. "The Evolution of ESG Reports and the Role of Voluntary Standards." Harvard Business School Working Paper, No. 23-024, October 2022.
- 06 Jan 2012
- Op-Ed
Where Green Corporate Ratings Fail
News Corporation—a multinational media conglomerate that includes BSKYB, Dow Jones, Fox News, 20th Century Fox and Star, among other units—announced earlier this year that it has become climate neutral, meaning that its operations have no net impact on global climate... View Details
- 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.
- 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.
- 16 Feb 2023
- HBS Case
ESG Activists Met the Moment at ExxonMobil, But Did They Succeed?
The impact-investment hedge fund Engine No. 1 made a big splash in May 2021 when it managed to get three nominees elected to the ExxonMobil board of directors. It was an open effort to prod the oil giant toward renewable energy and test whether activist investing could... View Details