George Serafeim

Harvard University | Harvard · Harvard Business School

In our Decade Award-winning article from 2012, we theorized and provided evidence consistent with nation-level institutions having a significant impact on corporate social performance (CSP) variation across companies. By establishing a link between the macro (i.e., country level) and micro (i.e., firm level) levels of analysis and by synthesizing a...

Analyzing data from approximately 1.5 million employees across 1,108 established public and private U.S. companies, we find that the strength of employee beliefs related to purpose is weaker in public companies. Among public companies, those beliefs are stronger for firms with more committed owners. These patterns are most pronounced within the sal...

Using measures of physical risk from climate change, we develop a methodology to allocate currency pairs according to a country’s vulnerability and construct portfolios with decreasing vulnerability to physical risk. We show that non-G10 currencies are more vulnerable to physical risk, have become less vulnerable over time, and that the vulnerabili...

We investigate whether environmental, social, and governance (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. The relation between news and market reaction is moderated by the cons...

We analyze 109,014 firm–day observations for 3,109 companies and examine market reaction to different ESG news. We find that prices react only to financially material ESG news, and the reaction is larger for news that is positive, receive more news coverage, and related to social capital issues. Using a prediction model based on pre-existing ESG ra...

As part of the Securities and Exchange Commission’s revision of Regulation S–K, which lays out reporting requirements for publicly-listed companies, many investors proposed the mandatory disclosure of sustainability information in the form of environmental, social and governance data. However, progress is contingent on collecting evidence regarding...

The global COVID crisis provides a test case for the argument that public companies, by making significant and credible commitments to their stakeholder relationships, signal their resilience to investors and, by so doing, cushion their market values against a general collapse. As one example, by limiting layoffs, providing flexible work schedules,...

We analyze how the use of different climate risk measures leads to different portfolio carbon outcomes and risk-adjusted returns. Our findings are synthesized in a rules-based investment framework, which selects a different type of climate metric across industries and weighs industries in the portfolio based on the variability of carbon outcomes am...

We test the hypothesis that if poor accounting quality (AQ) is associated with poor investor understanding of firms’ revenue and cost structures then poor AQ stocks likely respond more slowly than good AQ stocks to new non‐idiosyncratic information that affects both sets of firms. Consistent with this, results indicate that stock returns of good AQ...

The public debate about how to tackle climate change has been overwhelmingly dominated by the assumption that it can be solved through the adoption of an appropriate pricing regime. This paper argues that while the development of such a regime will be critical to slowing climate change, it is a necessary, but not a sufficient, condition. We argue t...

Combining environmental, social, and governance (ESG) data with “big data” measuring public sentiment about corporate sustainability performance, I found that the valuation premium for strong sustainability performance increases as a function of positive momentum in public sentiment. An ESG factor long (short) on companies with superior (inferior)...

SYNOPSIS Concerns about high rates of government corruption in resource rich countries have led transparency advocates to urge oil and gas firms to disclose payments to host governments for natural resources. Transparency, they argue, can increase government accountability and mitigate corruption. However, we find a low frequency of voluntary discl...

As the ESG finance field and the use of ESG data in investment decision‐making continue to grow, the authors seek to shed light on several important aspects of ESG measurement and data. This article is intended to provide a useful guide for the rapidly rising number of people entering the field. The authors focus on the following: • The sheer vari...

The authors summarize the findings of their event study of the capital market reactions to an inaugural set of 17 CEO presentations of their ‘long‐term plans’ to institutional investors. The findings show that, although sell‐side analysts appear unresponsive to such plans, both trading volumes and stock prices exhibit significant abnormal reactions...

We construct a measure of corporate purpose within a sample of U.S. companies based on approximately 500,000 survey responses of worker perceptions about their employers. We find that this measure of purpose is not related to financial performance. However, high-purpose firms come in two forms: firms characterized by high camaraderie between worker...

We examine the equity market reaction to events associated with the passage of a directive in the European Union (EU) mandating increased nonfinancial disclosure. These disclosures relate to firms’ environmental, social, and governance (ESG) performance, and would be applicable to firms listed on EU exchanges or with significant operations in the E...

Using survey data from mainstream investment organizations, we provide insights into why and how investors use reported environmental, social, and governance (ESG) information. Relevance to investment performance is the most frequent motivation, followed by client demand, product strategy, and then, ethical considerations. An important impediment t...

The author makes the case that business generally, not just government, should assume responsibility for social and environmental problems. The Sustainable Development Goals (SDGs) formally recognize the role of the private sector in addressing some of the world's most pressing environmental and social challenges. What started as a corporate social...

We study how career concerns influence banking analysts’ forecasts. Banking analysts’ first (last) earnings forecast of the year is relatively more optimistic (pessimistic) for a bank that could be their future employer. This pattern is not observed when the same analysts forecast earnings of banks unlikely to be their future employer. We use the G...

Corporate environmental and social reporting lacks the comparability across companies that is a characteristic of financial information. To address this weakness, Norges Bank Investment Management (NBIM) created analytical frameworks to measure the quality and scope of reporting relating to three focus areas: climate change, water and children’s ri...

Using survey data from mainstream investment organizations, we provide insights into why and how investors use reported environmental, social, and governance (ESG) information. Relevance to investment performance is the most frequent motivation, followed by client demand, product strategy, and then, ethical considerations. An important impediment t...

We construct a measure of corporate purpose within a sample of US companies based on approximately 500,000 survey responses of worker perceptions about their employers. We find that this measure of purpose is not related to financial performance. However, high purpose firms come in two forms: firms that are characterized by high camaraderie between...

Using newly available materiality classifications of sustainability topics, we develop a novel dataset by hand-mapping sustainability investments classified as material for each industry into firm-specific sustainability ratings. This allows us to present new evidence on the value implications of sustainability investments. Using both calendar-time...

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 environmental and social issues as financially material or immaterial, and we ana...

: Targets are an integral component of management control systems and play a significant role in achieving desirable performance outcomes. We focus on a key environmental performance objective—reduction of carbon emissions—as a setting in which to examine how target difficulty affects the degree of target completion in long-term non-financial perfo...

This chapter discusses the performance of broker recommendations and the research on the information anomalies related to estimate revisions and changes in analyst recommendations. Additionally, some of the first anomalies discovered that contradicted the theory of an efficient market were related to the information provided by analysts. Analyst re...

We study conference calls as a voluntary disclosure channel and create a proxy for the time horizon that senior executives emphasize in their communications. We find that our measure of disclosure time horizon is associated with capital market pressures and executives’ short-term monetary incentives. Consistent with the language emphasized during c...

We use Transparency International's ratings of self-reported anticorruption efforts to analyze factors underlying the ratings. Our tests examine whether these disclosures reflect firms' real efforts to combat corruption or are cheap talk. We find that the ratings are related to enforcement and monitoring, country and industry corruption risk, and g...

Using newly-available materiality classifications of sustainability topics, we develop a novel dataset by hand-mapping sustainability investments classified as material for each industry into firm-specific sustainability ratings. This allows us to present new evidence on the value implications of sustainability investments. Using both calendar-time...

We study how career concerns influence banking analysts’ forecasts and how their forecasting behavior benefits both them and bank managers. We show that banking analysts issue early in the year relatively more optimistic and later in the year more pessimistic forecasts for banks that could be their future employers. This pattern is not observed whe...

We examine how cross-country differences in product, capital, and labor market competition, as well as earnings management affect mean reversion in accounting return on assets. Using a sample of 48,465 unique firms from 49 countries, we find that accounting returns mean revert faster in countries where there is more product and capital market compe...

We investigate the effect of corporate sustainability on organizational processes and performance. Using a matched sample of 180 U.S. companies, we find that corporations that voluntarily adopted sustainability policies by 1993—termed as high sustainability companies—exhibit by 2009 distinct organizational processes compared to a matched sample of...

Using a large sample of diversified firms from 38 countries we investigate the influence of several national-level institutional factors or ‘institutional voids’ on the value of corporate diversification. Specifically, we explore whether the presence of frictions in a country’s capital markets, labor markets, and product markets, affect the excess...

Faced with a large percentage of investors that chase short-term returns, companies could benefit by attracting investors with longer-term horizons and incentives that are more consistent with the long-term strategy of the company. The managers of most companies take their investor base as a “given” that cannot be changed through their actions or w...

We explore the impact of corporate social responsibility (CSR) ratings on sell-side analysts’ assessments of firms’ future financial performance. We suggest that when analysts perceive CSR as an agency cost they produce pessimistic recommendations for firms with high CSR ratings. Moreover, we theorize that over time, the emergence of a stakeholder...

While a number of studies document that organizations go through numerous stages as they increase their commitment to sustainability over time, we know little about the role of the Chief Sustainability Officer (CSO) in this process. Using survey and interview data we analyze how a CSO’s authority and responsibilities differ across organizations tha...

In this paper, we present the two primary functions of corporate reporting (information and transformation) and why currently isolated financial and sustainability reporting are not likely to perform effectively those functions. We describe the concept of integrated reporting and why integrated reporting could be a superior mechanism to perform the...

In this paper, I examine the relation between Integrated Reporting (IR) and the composition of a firm’s investor base. I hypothesize and find that firms that practice IR have a more long-term oriented investor base with more dedicated and fewer transient investors. This result is more pronounced for firms with high growth opportunities, not control...

One of the challenges companies claim to face in making sustainability a core part of their strategy and operations is that the market does not care about sustainability, either in general or because the time frames in which it matters are too long. The response of investors who say they care about sustainability—and their numbers are large and gro...

A long-standing ideology in business education has been that a corporation is run for the sole interest of its shareholders. I present an alternative view where increasing concentration of economic activity and power in the world’s largest corporations, the Global 1000, has opened the way for managers to consider the interests of a broader set of s...

A mishmash of sustainability tactics does not add up to a sustainable strategy. Too often, companies launch sustainability programs with the hope that they'll be financially rewarded for doing good, even when those programs aren't relevant to their strategy and operations. They fail to understand the trade-offs between financial performance and per...

Prior research on equity analysts focuses almost exclusively on those employed by sell-side investment banks and brokerage houses. Yet investment firms undertake their own buy-side research, and their analysts face different stock selection and recommendation incentives than their sell-side peers. We examine the selection and performance of stocks...

We argue that a shift in the prevailing institutional logic – from an agency perspective to a value perspective – impacts the evaluation of corporate social responsibility (CSR) by sell-side investment analysts. We use a large sample of publicly traded US firms over 15 years and find that under a powerful agency perspective, CSR is unfavorably eval...

Using survey data from firms around the world I analyze how detection of bribery has impacted a firm’s competitiveness over the past year. Managers report that the most significant impact was on employee morale, followed by business relations, and then reputation and regulatory relations. The impact on stock price has been much less significant and...

We use Transparency International’s ratings of self-reported anticorruption efforts for 480 corporations to examine factors underlying firms’ efforts and their consequences. We find that firms with high anticorruption efforts are domiciled in countries with low corruption ratings and strong anticorruption enforcement, operate in high corruption ris...

Corporations are increasingly under pressure to improve their environmental performance and to account for potential risks and opportunities associated with climate change. In this paper, we examine the effectiveness of monetary and nonmonetary incentives provided by companies to their employees in order to reduce carbon emissions. Specifically, we...

A new generation of corporate reporting - integrated reporting - is emerging that will help investors and other key stakeholders such as employees, customers, suppliers, and NGOs develop a deeper and more comprehensive appreciation of corporate performance than what is currently provided by GAAP financial reporting. The purpose of this paper is to...

Using conference call transcripts to measure the time horizon that senior executives emphasize when they communicate with investors, we explore the effect of managerial short-termism on firm’s investor clientele and risk. We find that our measure of short-termism is associated with various proxies for accruals and real earnings management, suggesti...

We use price pressure resulting from purchases by mutual funds with large capital inflows to identify overvalued equity. This is a relatively exogenous overvaluation indicator as it is associated with who is buying—buyers with excess liquidity—rather than what is being purchased. We document substantial stock price impact associated with purchases...

We study how the availability of domestic credit influences the contribution that financing activities make to a firm’s return on equity (ROE). Using a sample of 51,866 firms from 69 countries, we find that financing activities contribute more to a firm’s ROE in countries with higher domestic credit. The higher contribution of financing activities...