Purpose – This study aims to investigate the potential threats to the independence of an auditor who provides both auditing and non-audit services (NAS), in terms of credibility of and confidence in audit quality. Design/methodology/approach – In this study, we first replicate the results of Campa and Donnelly (2016) using hand-collected publicly available data for a sample of 91 Italian manufacturing public companies audited by a Big 4 and non-Big 4 audit firm over a longer time horizon (2015˗2019) using the panel data approach, based on three interconnected regression models. Findings – Previous studies in this area did not find a unique interpretation of the association between auditor independence and provision of NAS. Our findings reveal that auditor independence, as measured by the magnitude of discretionary accruals, is compromised by the provision of NAS, especially when unexpected audit fees are lower than expected. Enhanced credibility can lead to greater confidence in audit value. This study’s results should be of interest to European and U.S. legislators, to improve financial reporting quality. Originality/value – In the wake of the global financial crisis and loss of confidence in the role of auditors, this study investigates the supposed threats, to to aim to enhance the credibility of and confidence in audit quality, especially in settings outside the Anglosphere. This study would contribute to the literature to support the more binding approach for audit firms.

The aim of this study is to analyse the behaviour of the book-to-market index, B/MV, on a sample of Italian listed companies that completed a M&A operation in the span 2008-2016, the decade of the economic-financial crisis. Moreover the authors' interest in investigating the relationship between the market index and the income and non-earnings performance index. The study has verified whether the listed Italian companies sampled have book-to-market indices in line with corporate performance in terms of profitability, and therefore of general economic, patrimonial and financial equilibrium. The intention is to consider if the market manages to "capitalise" corporate trends regularly and with what intensity. The hypothesis concerns the possibility that the B/MV may be more affected by financial market externalities than by the specific economic and financial outlook in terms of market capitalisation. The profound geopolitical and macroeconomic changes of the last few decades and the consequent multiple corporate crises, have undoubtedly called into question the validity and reliability of certain valuation assumptions.

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