This study examines the impact of cross‐firm financial statement comparability on regulatory oversight of accounting quality. Required to review each firm's periodic filings at least once every three years, the SEC learns about the degree to which a firm's accounting system is comparable to those of its peers. We posit that the SEC's ex ante knowledge about financial statement comparability, gleaned from prior‐year filing reviews, facilitates its evaluation of firms' accounting quality during the current‐year filing review. Consistent with the notion that comparable accounting systems enhance regulators' ability to identify discretionary accounting deviations, we find that the likelihood of the SEC issuing a comment letter for higher abnormal accruals increases with financial statement comparability. Further analysis reveals that the regulatory benefits from higher financial statement comparability are more salient when the SEC faces higher monitoring constraints in filing reviews. Moreover, our finding shows that comparable accounting numbers across firms help the SEC detect severe accounting violations that necessitate restatements. Overall, we provide novel evidence suggesting that higher financial statement comparability improves the efficacy of the SEC's oversight of accounting quality by reducing the information costs associated with cross‐firm comparisons.

This study examines the informational value of local news outlets and how they affect insider trading. We hypothesize that local news coverage is a critical channel through which outsiders acquire local information, which restricts insiders’ ability to profit from their information advantage. We argue that a loss of local news coverage increases information opacity faced by outsiders, while making it easier for insiders to seize profitable trading opportunities. Exploring the staggered shutdown of local newspapers, our difference-in-differences estimation presents novel evidence that insiders from closure counties trade more profitably after local newspaper closures, particularly in small firms that lack alternative news sources. Further analyses reaffirm that the post-closure increase in trading profits is unlikely to be wholly driven by regional economic conditions and is likely driven by increased information costs. Our results highlight that local newspapers play a meaningful role in mitigating information asymmetry between insiders and outsiders. Data Availability: Data used in this study are available from the sources identified in the paper.