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This study aims to examine the Taiwan setting, where audit partners’ names are presented in the audit report and where audit committee formation is voluntary in the initial stage of audit committee reform. This paper investigates the effects of the formation of voluntary audit committees on the selection of individual audit partners, and, in turn, the audit quality. This contrasts with previous studies investigating the relationship between audit committees and auditor selection at the audit firm level.

This paper samples all of Taiwan’s publicly listed firms for the period 2007–2012 and uses Heckman’s (1979) two-stage estimation model to achieve our objectives.

Using different characteristics of individual engagement partners as proxies for a higher quality auditor, the main empirical results show that voluntary audit committee formation is positively related to an industry specialist lead partner and a lead partner that has a larger number of clients. In addition, this paper also finds that voluntary audit committee formation has a positive impact on audit quality (proxied by discretionary accruals). The results suggest that the voluntary formation of an audit committee contributes positively to both auditor selection and audit quality. Furthermore, an additional test shows that the main empirical results are robust to a validity threat that firms that have good corporate governance prior to the formation of voluntary audit committees tend to select high-quality audit partners.

The paper contributes to the audit committee literature in the following ways: this paper takes advantage of Taiwan’s unique setting, where forming an audit committee is not compulsory in the initial stage of audit committee reform, to investigate the voluntary audit committee, auditor selection and audit quality; this paper expands on Abbott and Parker’s (2000) study of audit committee characteristics and auditor selection at the audit firm level by examining this relationship at the individual audit partner level; this paper responds to the call by Church et al. (2008) and DeFond and Francis (2005) who propose more studies on audit quality at the individual engagement partner level.

The purpose of this study is to explore the effect of managerial ability on voluntary environmental, social and governance (ESG) disclosure and assurance. By focusing on managerial ability, this study provides a more nuanced understanding of the factors influencing a firm’s ESG disclosure and assurance practices. This study contributes to a relatively unexplored area of study regarding the role of top management in promoting ESG reporting.

This study draws on a sample of publicly listed firms from 2014 to 2019 in Taiwan and applies the data envelopment analysis method to measure managerial ability. Heckman’s (1979) two-step model is used to estimate the primary models to prevent the results from being affected by possible bias because of self-selection.

The empirical evidence suggests that managerial ability is positively related to voluntary ESG disclosure and intention to seek third-party assurance of the report. Overall, managerial ability determines whether a firm will use voluntary ESG disclosure and assurance as a corporate strategy to respond effectively to stakeholders’ needs. The findings are robust after using alternative measures of managerial ability.

Investors and other stakeholders keen on seeking ESG information offered by companies could find the findings of this study valuable. By better comprehending how managerial competence impacts voluntary ESG disclosure and assurance, stakeholders may be better equipped to hold companies responsible for their ESG disclosure practices and make informed investment decisions.

In the ESG decision-making process, managers with better abilities have a higher tendency to use voluntary disclosure and assurance as a part of the company’s sustainable policy.

Unlike previous studies of the determinant factors of ESG disclosure, which mainly explore factors at the national or corporate level, this study focuses on factors at the individual level (i.e. managerial ability) to fill the gap in the literature. This study also presents empirical evidence that corroborates the idea that managerial competence can influence not only ESG disclosure but also the voluntary assurance of ESG information.