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Exploiting an exogenous regulatory shock and a novel measure of asset redeployability, this paper aims to explore the effect of independent directors on asset redeployability. In particular, the authors use an innovative measure of asset redeployability recently developed by Kim and Kung (2016). This novel index has been rapidly adopted in recent literature.

Relying on a quasi-natural experiment, the authors execute a difference-in-difference analysis based on an exogenous regulatory shock to board independence. To mitigate endogeneity and demonstrate causation, the authors also perform propensity score matching, instrumental-variable analysis and Oster’s (2019) approach for testing coefficient stability.

The difference-in-difference estimates show that firms forced to raise board independence have significantly fewer redeployable assets after the shock than those not required to change board composition. This is consistent with the managerial myopia hypothesis. Subject to more intense monitoring, managers behave more myopically, focusing more on assets that are currently useful to the firm and less on redeployability in the future.

The study makes key contributions to the literature. First, the study is the first to examine the effect of board governance on asset redeployability. Second, the authors exploit an innovative index of asset redeployability that has been recently constructed in the literature. Third, by using a natural experiment, the results are much more likely to reflect causality than merely an association.

Exploiting a novel measure of innovation, the authors investigate whether independent directors improve innovation efficiency. This novel measure of innovation captures the extent to which the firm generates revenue from its research & development and is, therefore, more economically meaningful. The authors also use a text-based measure of innovation.

The authors rely on a quasi-natural experiment based on the passage of the Sarbanes-Oxley Act of 2002 that compelled certain firms to raise board independence. The difference-in-difference analysis is far less vulnerable to endogeneity and is more likely to show a causal influence, rather than a mere association.

The results show that more independent directors improve innovation efficiency significantly. Specifically, firms forced to raise board independence experienced a much higher increase in innovation than those not required to change their board composition. The authors also explore another novel measure of innovation, a text-based metric of innovation.

The research is original in several ways. First, the authors take advantage of an exogenous regulatory shock as a quasi-natural experiment. This approach is far less susceptible to endogeneity. Second, the authors use a novel measure of innovation efficiency, i.e. research quotient, which is more economically meaningful. Finally, the authors use a unique measure of innovation derived from powerful textual analysis.

Prior studies use two measures of firm-specific return variation (FSRV): idiosyncratic volatility in absolute and relative terms, the latter of which is also termed stock price nonsynchronicity. Whereas most research focuses on investigating the idiosyncratic volatility puzzle, the authors carry out comparison of these two measures and further investigate which of the two constituents of nonsynchronicity explain the association between FSRV and stock returns, emphasising the importance of assessing which component drives stock returns.

The authors use the US individual stock returns from 1925 to 2016 and define the two measures of FRSV based on the Fama and French (1993) model. Specifically, the authors decompose the relative measure into two components: (i) absolute idiosyncratic volatility and (ii) systematic volatility. The authors conduct various tests based on high-minus-low, zero-investment quintile portfolio sorts and perform the Fama–MacBeth analysis by singling out each component.

The authors find a positive return on the portfolio sorted on relative idiosyncratic volatility or on systematic volatility, but find a negative return sorted on absolute idiosyncratic volatility. The results are robust after controlling for size, BM and other risk characteristics using a double-sorting approach. The Fama–MacBeth regression results show that a positive association between the relative measure and stock returns is driven primarily by the low-systematic-volatility anomaly across firms. The findings are robust to controlling for return residual momentum, skewness, jumps and information discreteness.

Extant research posits the idiosyncratic volatility puzzle and the low-volatility anomaly. The authors emphasize the importance of integrating these two streams of research. This study enhances the understanding of the driving force underlying the relationship between FSRV and cross-sectional stock returns.

This paper aims to explore the effect of corporate social responsibility (CSR) on shareholder value using the stock market reactions to a terrorist attack. This paper exploits the September 11 terrorist attack as an unanticipated exogenous shock that reduced shareholder wealth suddenly and unexpectedly. Based on the risk-mitigation hypothesis, the argument is that more socially responsible firms should suffer less negative market reactions.

This paper uses the standard event study methodology to estimate the stock market reactions to the 9/11 terrorist attack. Then, the study executes a cross-section analysis to determine whether CSR offers any protection in the presence of a sudden negative shock. Additional analysis includes propensity score matching, instrumental-variable analysis and using Oster’s (2019) method for testing coefficient stability.

The results show that the negative stock market reactions to the shock are significantly alleviated for firms with strong social responsibility. A rise in CSR by one standard deviation improves the market reactions by 22.56% of the average decline. This is consistent with the prediction of the risk mitigation hypothesis, where CSR spawns moral capital or goodwill that functions as an insurance-like defense in case of an adverse event.

The study focuses on short-term market reactions because this method is more likely to show a causal effect. Future research may investigate long-term effects.

While prior research has investigated the effect of CSR on firm value, it has been challenging to establish causality. The approach is more likely to show causality as it is based on a sudden and unanticipated negative shock. This paper also uses several methods to reduce endogeneity, making it more likely that the results show causality, rather than merely an association.

This study aims to investigate the effects of ownership concentration and corporate governance on the extent of risk-taking in an important emerging economy – Thailand.

The results are corroborated by additional analysis, including an instrumental-variable analysis and propensity score matching.

Large owners are under-diversified and are thus more vulnerable to the firm’s idiosyncratic risk. Therefore, they tend to advocate less risky corporate policies and strategies. Consistent with this notion, the authors find that more concentrated ownership induces firms to take significantly less risk.

Ownership in Thai firms is substantially more concentrated than that in developed economies, providing a unique opportunity to study the effect of highly concentrated ownership on risk-taking.

This paper examines whether short sellers aggravate volatility in the Australian stock market by using five different realized volatility (RV) measures during a more stable period.

The authors develop a measure to capture the abnormal level of short selling for each stock and examine the bivariate and trivariate dynamic relationships between abnormal short selling and five volatility measures: the RV, continuous and jump components of RV, upside and downside volatilities.

Overall, the findings indicate a weak association between abnormal short selling and volatility. Where the relationships are significant, the authors generally find that lagged abnormal short selling is negatively associated with both upside and downside volatilities. In general, short selling does not drive or amplify the decline in stock prices.

This paper contributes to existing literature in various aspects. First, the authors offer evidence on the relationship between abnormal short selling and volatility in a general market condition while existing studies often found mixed results of the effects of short selling on volatility around extreme events. Second, the authors add to the literature on the volume-volatility relation by introducing abnormal short selling. Although abnormal short volume does not supplant the number of trades in the volume-volatility relation, it has some incremental, albeit negative, effect on volatility. Finally, the study provides further evidence for the debate on the desirability of short sellers in financial markets.

The paper aims to investigate the effect of uncertain times on LGBT-supportive corporate policies, exploiting a novel text-based measure of economic policy uncertainty (EPU) that was recently constructed by Baker et al. (2016). LGBT-supportive policies have attracted a great deal of attention in the media lately. There is also a rapidly growing area of the literature that addresses LGBT-supportive policies specifically.

The authors execute a regression analysis and several other robustness checks including propensity score matching (PSM) and an instrumental-variable analysis to mitigate endogeneity.

The authors' results show that companies significantly raise their investments in LGBT-supportive policies in times of greater uncertainty, reinforcing the risk mitigation view where LGBT-supportive policies create moral capital with an insurance-like effect that mitigates adverse consequences during uncertain times. The effect of EPU on LGBT-supportive policies is above and beyond its effect on corporate social responsibility (CSR) in general.

The authors' study is the first to explore the effect of uncertain times on LGBT-supportive corporate policies. The authors contribute to a crucial area of the literature that examines how firms respond to EPU. In addition, the authors enrich the literature on LGBT-friendly policies by showing that EPU is one of the significant determinants of LGBT-friendly policies.

The United Nations' sustainable development goals (SDGs) put together a global framework in an attempt to address environmental, social and governance (ESG) concerns. Measuring a company’s contribution to the SDGs relies heavily on ESG reporting. This paper aims to examine the impact of ESG reporting on the corporate profitability of listed companies in Thailand over the period of 2019–2021.

Using 147 listed firms in the ESG group, content analysis was used to quantify the ESG reporting (within 11 themes), while corporate profitability was measured by return on asset and return on equity. Descriptive analysis, correlation matrix and panel regression are used to analyze the data of this study.

Consistent with the legitimacy, stakeholder and signaling theories, the authors found a statistically significant and positive impact of ESG reporting on corporate profitability in Thailand.

The findings highlight the importance of incorporating ESG considerations into companies’ reporting and decision-making processes, as these can enhance firm profitability and performance, attract stakeholders, improve their competitive advantage and step toward sustainability.

The authors investigate whether firm-specific vulnerability to climate change influences foreign exchange hedging, using a novel text-based measure of firm-level climate change exposure generated by state-of-the-art machine-learning algorithms.

The authors' empirical analysis includes firm-fixed effects, random-effects regressions, propensity score matching (PSM), entropy balancing, an instrumental-variable analysis and using an exogenous shock as a quasi-natural experiment.

The authors' findings suggest that greater climate change exposure brings about a significant reduction in exchange rate hedging. Companies more exposed to climate change may invest significant resources to address climate change risk, such that they have fewer resources available for currency risk management. Additionally, firms seriously coping with climate change risk may view exchange rate risk as relatively less important in comparison to the risk posed by climate change. Notably, the authors also find that the negative effect of climate change exposure on currency hedging can be specifically attributed to the regulatory aspect of climate change risk rather than the physical dimension, suggesting that companies view the regulatory dimension of climate change as more critical.

Recent studies have demonstrated that climatic fluctuations represent one of the most recent sources of unpredictability, thereby impacting the economy and financial markets (Barnett et al., 2020; Bolton and Kacperczyk, 2020; Engle et al., 2020). The authors' study advances this field of research by revealing that company-specific exposure to climate change serves as a significant determinant of corporate currency hedging, thus expanding the existing knowledge base.

This paper aims to explore the effect of economic policy uncertainty (EPU) on board gender diversity. Prior research shows that female directors play a beneficial role. The advantage of board gender diversity should be particularly helpful when firms have to navigate an uncertain environment. So the authors hypothesize that firms adjust their board gender diversity in response to EPU.

The authors execute a regression analysis. To minimize endogeneity, the authors execute firm-fixed effects regressions, an instrumental variable (IV) analysis and propensity score matching.

Consistent with their hypothesis, the authors find that firms significantly raise board gender diversity in response to EPU. To draw a causal inference, the authors exploit the 9/11 terrorist attack as an exogenous shock that elevated EPU unexpectedly. The authors’ IV analysis corroborates the results. Finally, the authors show that board gender diversity substantially mitigates the adverse effect on shareholder wealth brought about by an unanticipated negative shock attributed to the 9/11 attack.

According to the authors’ knowledge, this study is the first to investigate the effect of EPU on board gender diversity. This research contributes to two important areas of the literature, i.e. board gender diversity and EPU. The authors show that board gender diversity is beneficial and firms act accordingly when facing more economic uncertainty.