Can mandatory dual audit reduce the cost of equity? Evidence from China

Rui Zhang, Raymond M. K. Wong, Agnes W. Y. Lo and Gaoliang Tian

Accounting and Business Research, 2022, vol. 52, issue 3, 291-320

Abstract: In China, a mandatory dual audit system for domestic A-share firms cross-listed on the Hong Kong stock market (i.e. AH companies) was abolished in 2010. Since then, AH companies have been allowed to choose to have a dual audit or a single audit. We find that the mandatory dual audit regime before the deregulation is associated with a lower cost of equity than voluntary dual audit after the deregulation. Furthermore, the lower cost of equity under the mandatory dual audit regime is greater in companies exposed to stronger financial constraints and with higher agency costs, and is not attenuated by alternative voluntary audits. Our results are not affected by accounting standards convergence and audit quality, and are robust to various model specifications. Our results suggest that the role of mandatory dual audit in mitigating agency costs and information asymmetry is not replaceable by voluntary dual audit.

Date: 2022
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DOI: 10.1080/00014788.2020.1870432

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