This paper proposes the concepts of ESG information flows and a predictable framework of ESG flows based on AR process, and studies how ESG information flows are incorporated into and affect a dynamic portfolio with transaction costs. Two methods, called the ESG factor model and the ESG preference model, are considered to embed ESG information flows into a dynamic mean-variance model. The dynamic optimal portfolio can be expressed as a traditional optimal portfolio without ESG information and a dynamic ESG preference portfolio, and the impact of ESG information on optimal trading is explicitly analyzed. The rich numerical results show that ESG information can improve the out-of-sample performance, and ESG preference portfolio has the best out-of-sample performance including the net returns, Sharpe ratio and cumulative return of portfolios, and contribute to reducing risk and transaction costs. Our dynamic trading strategy provides valuable insights for sustainable investment both in theory and practice.

摘 要：本文基于利益相关者理论、信号传递理论和委托代理理论分析了企业 ESG 表现对绿色创新绩效可能的影响及其机制，并以 2009—2021 年中国 A 股上市公司为样本，实证分析了企业 ESG 表现的绿色创新效应。从机制分析发现，ESG 表现主要通过缓解融资约束、提高人力资本水平促进企业绿色创新绩效。从拓展性研究发现，ESG 表现的三个子维度都有助于提升绿色创新绩效，且公司治理表现的提升效应最强；ESG 表现不仅提高企业策略性绿色创新绩效、独立绿色创新绩效，还可提升实质性绿色创新绩效、合作绿色创新绩效。

立足于当前民营企业“反向混改”积极推进和 ESG 实践蓬勃发展的大背景,文章以2010—2020 年存在国有资本参股的 A 股民营上市公司为样本,检验国有股东委派董事对民营企业善待员工的影响、机制及边界条件。结果发现,国有股东委派董事显著提升了民营企业的员工责任分数,有利于民营企业善待员工。机制分析表明,国有股东委派董事通过提供资源支持和增加社会关注促进民营企业履行善待员工的社会责任。异质性分析表明,上述结果在管理层短视程度较高、行业集中度较高以及劳动密集度较低的样本中更加显著。进一步考虑国有股东的异质性特征发现,当国有股东为战略型投资者以及与民营企业位于同一注册地时,其委派董事对民营企业善待员工的促进作用更加显著。文章从董事会层面混合治理的视角厘清了国资参股促进民营企业善待员工的机制和作用条件,为民营企业通过制度设计实现“高质量”混合以及借助“反向混改”的契机改善ESG 实践提供了一定的启示。

This paper investigates the effect of exchange-traded funds (ETFs) on the ESG performance of their underlying firms. Using data from China, we find that ETFs enhance the ESG performance of their underlying firms. This finding remains consistent after several robustness and endogeneity tests. Further, we show that the effect is more pronounced for non-SOEs, firms in low-polluting industries, and firms at growth and maturity stages. Studying the mechanisms behind these results, we find that ETFs mitigate the corporate agency problems, enhance the willingness of managers to invest in ESG, and improve the ESG performance.

Identifying and addressing the factors influencing the within-firm pay gaps has become a pressing issue amidst the widening global income inequality. This study investigates the impact of corporate ESG ratings on employee income and pay gaps using data from Chinese-listed companies between 2017 and 2021. The results suggest that ESG ratings significantly increase employee income. Further research indicates that ESG ratings exacerbate the within-firm pay gaps and income inequality due to the varying bargaining power among employees. This effect is particularly pronounced in non-state-owned and large-scale companies. This is also true for all kinds of companies in traditional and highly competitive industries. However, reducing agency costs and improving information transparency can help vulnerable employees with weaker bargaining power in income distribution to narrow their pay gaps. The research findings offer important insights to promote fair income distribution within companies and address global income inequality.

This paper examines the spillover effect of environmental regulations on firms’ green technological innovation, from the perspective of supply chain relationships. Analyzing data from Chinese listed companies, we find that the average environmental regulatory pressure faced by the client firms of a supplier firm enhances the green patent applications filed by the supplier firm, indicating that environmental regulatory pressure from clients spills over to suppliers. When the industries of suppliers are more competitive or the proportion of their sales from the largest client is higher, suppliers feel more pressured to engage in green innovation, resulting in more green patent applications. Thus, via their negotiation power, client firms can prompt supplier firms to innovate to meet their demand for green technologies. Finally, we show that this effect is particularly pronounced when supplier firms are located in highly marketized regions, receive low R&D government subsidies, or have high ESG ratings.

Based on institutions' general role and the specialty of motivated investors' relatively larger stake, we examine whether ownership by motivated investors is associated with the focal firm's ESG rating disagreement in China. Our results suggest that ownership by motivated investors can decrease the focal firm's ESG rating disagreement. That relationship is strengthened by a better internal or external information environment. What's more, ownership by motivated investors can increase the quality of ESG disclosure and the level of consensus ESG rating. ESG rating disagreement increases stock return volatility and price synchronicity, while motivated investors can mitigate those negative effects. Our results confirm that motivated investors have greater incentive and capability to discipline managers and influence corporate policies and actions even in an emerging market with weak investor protection and the popularity of exploration by ultimate controllers. That would shed valuable insights into the high-quality development of other emerging markets, especially those in south-east Asian.

We examine ESG pricing in the Chinese stock market. The results show that holding stocks with high ESG scores does not provide investors with higher future excess returns. On the contrary, stocks with low ESG scores perform better. However, this negative ESG premium feature is robust only in small-cap stocks. As size increases, the negative ESG premium fades away and is characterized by a positive premium in larger stock subgroups. We further examine the source of the negative ESG premium in small-cap stocks. The results show that this negative premium can not be explained by firm characteristics, short-term reversal effects, and lottery characteristics of stocks, but is associated with ESG investors. Specifically, the higher the ESG score with more ESG investors in small-cap stocks, the lower the expected excess return of the stock. This result implies that firms may benefit from ESG performance and disclosure, while investors may suffer from ESG strategies. Based on the results, we remind investors that they should be cautious in using ESG indicators to guide their investment decisions.

This study explores the proclivity of institutional investors in China towards highESG stocks amidst the growth of ESG investment funds. Using A-share data from 2015-2022 and a Tobit model analysis, it is found that these investors indeed favor such stocks, particularly under extensive analyst coverage and in non-state-owned firms. However, rating discrepancies can impact this preference. The attraction lies in reduced operational risks and improved net profits. Notably, independent investors show a stronger ESG preference, especially within high-pollution industries. Thus, fostering ESG investment among institutional investors can improve resource allocation in China's capital market, favoring eco-friendly companies.

The relationship between corporate Environmental, Social, and Governance (ESG) performance and its value has garnered increasing attention in recent times. However, the utilization of ESG scores by rating agencies, a critical intermediary in the linkage between ESG performance and value, presents challenges to ESG research and investment as a result of inherent subjectivity, hysteresis, and discrepant coverage. Fortunately, news can provide an objective, timely, and socially relevant perspective to augment prevailing rating frameworks and alleviate their shortcomings. This study endeavors to scrutinize the influence of ESG-related news on the Chinese stock market, to showcase its efficacy in supplementing the appraisal of ESG performance. The study's findings demonstrate that (1) the stock market is significantly impacted by ESGrelated news; (2) ESG-related news with different attributes (sentiments and sources) have notably diverse effects on the stock market; and (3) the heterogeneity among enterprises (industries and ownership structures) affects their ability to withstand ESGrelated news shocks. This study contributes novel insights to the comprehensive and objective assessment of corporate ESG performance and the management of its media image by providing a vantage point on ESG-related news.