This paper considers the anti-corruption disclosure reporting of the large UK-quoted extractive companies from 2003 to 2019. This period includes the introduction of the 2010 UK Bribery Act, which might be expected to influence corporate disclosure. It takes content analysis metrics from the environmental reporting literature, which is a more developed area of research, and considers an area with a higher volume of corporate disclosures. It applies these metrics to investigate the trends in corruption reporting over time and the impact of the introduction of the Act on reporting breadth and depth. We find that some of the metrics would appear to add more insight than others in this new context. We conclude that the volume of reporting has grown over time, but this would seem to be in breadth, more questions addressed rather than more depth to the answers given. There has been a step-change in reporting since the introduction of the Act, though concluding whether this has increased quality may depend on your perspective and interest as a user of the information.

Purpose Building upon institutional pressures on firms to deal with corruption, this study aims to investigate the association between a firm's engagement with anti-corruption disclosure quality (ACD_Q) and earnings management (EM). Also, this study examines the moderating role of audit quality in the association between ACD_Q and EM. Design/methodology/approach The authors constructed an ACD_Q index based on the 2010 UK Bribery Act and taking into account a wide range of rules on corruption and bribery, including those of the OECD, World Bank, UNCTAD, UNGC, UNCAC and GRI. Generalized method of moments and panel regression were used to examine the association between ACD_Q and EM. Findings Using a sample of 2,695 firm‐year observations of the UK’s FTSE-350 from 2008 to 2018, this study finds ACD_Q is negatively associated with EM. In addition, this negative relationship is contingent on audit committee independence and audit committee expertise. This finding is supported by additional robustness and sensitivity analysis. Practical implications The empirical evidence reiterates the crucial need for more concerted efforts to ensure corporate engagement in anti-corruption practices with a view to reducing earnings manipulations. Originality/value This study contributes to the limited evidence that investigates how ACD Q influences EM in the UK after the introduction of the UK Bribery Act in 2010. Furthermore, by considering the period from 2008 to 2019, this study investigates the potential moderating role of UK corporate governance reforms in EM reduction. In particular, to the best of the authors’ knowledge, this study assesses for the first time the moderating effect of audit committee mechanisms on the ACD Q and EM nexus.