and seminar participants at the 2015 CBS research seminar for helpful comments. Marie Herly gratefully acknowledges the financial support of FSR Danish Auditors. The data that support the findings of this study are available through public sources listed in the paper.

Financial restatements are costly, but frequent, events and many firms restate several times. We explore why rational managers engage in misreporting despite the costly consequences. To guide our analysis, we build a parsimonious model of reporting bias and the cost of restating. In our model, the observed cost of a restatement conveys information about the true cost of biasing financial statements, which the manager incorporates into the optimal choice of bias. A restatement hence offers managers an opportunity to learn about the true cost of reporting bias, which allows them to update their biasing strategy if the observed cost differs from the expected. We test the model's predictions by analyzing how firms' accruals quality changes after observing the costs attached to restating, which we measure as the market loss following a restatement scaled by the restatement's net income effect. We find that future accruals quality is increasing in the cost of restating and the change in the cost of restating. Consistent with our stylized model, our results indicate that rational managers use the insights from prior restatements to improve their future bias strategy.

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