Downside risks are ubiquitous and can profoundly impact firm operations and valuation. Failure to adequately assess and manage target firms' downside risks hinders acquirers' ability to integrate and manage these businesses. This article introduces a novel measure of firms' downside risk similarity (DRS) based on risk factor descriptions and examines its implications for mergers and acquisitions (M&A) outcomes. We first validate that the measure is distinct from existing similarity measures and that it captures similarity in firms' potential significant downside. Using the new measure, we find that the market reacts more positively to deals in which acquirers and targets share more downside risks. Additional analyses show that this beneficial effect of DRS is driven primarily by risks that are idiosyncratic or firm‐specific, consistent with these risks requiring acquirers' relevant expertise to manage. Last, we document that in deals with more similar downside risks, the acquirers experience fewer risk profile changes and are less likely to suffer from adverse outcomes, such as deal‐specific goodwill impairment, divestitures, and significant profitability declines. Overall, we conclude that DRS plays a significant role in the M&A process.

In this study, we examine whether audit committee accounting expertise helps to promote audit quality by motivating auditors to conduct diligent internal control audits and make appropriate internal control assessments because audit committee accounting expertise safeguards auditors from dismissal following adverse internal control opinions. Among clients with existing and likely internal control material weaknesses (as proxied by future restatements of audited financial statements), we find a greater likelihood of adverse internal control audit opinions when the audit committee has greater accounting expertise (measured by the proportion of accounting experts on the audit committee). Among all clients, we find a lower likelihood of subsequent auditor dismissal following an adverse internal control audit opinion when the audit committee has greater accounting expertise. In further analyses, we find that this lower likelihood of subsequent auditor dismissal occurs when at least two audit committee members possess accounting expertise. We also find some evidence that CFO influence (but not CEO influence) over the audit committee negates the increased likelihood of adverse internal control opinions when internal control material weaknesses likely exist, as well as the decreased likelihood of auditor dismissal following adverse internal control opinions. These findings have important implications for regulators and corporate nominating committees interested in promoting audit committee effectiveness.

Motivated by prior literature on organizational identification and 23 semistructured interviews with a variety of US audit partners and directors, we examine whether the gender and ethnic diversity of an office's audit partners influences the retention of the office's audit professionals and the quality of the audits conducted by the office. Using hand‐collected data on US audit partners, we find that greater levels of (or changes in) diversity in office audit partners' gender and ethnicity are associated with lower (reduced) turnover among office audit professionals and higher (increased) office‐level audit quality. We conduct a path analysis based on the most common mechanisms highlighted in our interviews to provide further insight into the audit quality results. The results indicate partial mediation through increased retention, greater gender and ethnic diversity among office audit personnel, client continuity, and increased efficiency. Further tests reveal that the association with audit quality is incremental to, and distinct from, the effect of individual engagement partner characteristics and does not reflect client screening. The findings underscore the importance of gender and ethnic diversity among office audit partners to organizational outcomes and provide important practical implications for audit firms.