We examine how the criteria for choosing estimation samples affect the ability to detect discretionary accruals, using several variants of the Jones (1991) model. Researchers commonly estimate accruals models in cross-section, and define the estimation sample as all firms in the same industry. We examine whether firm size performs at least as well as industry membership as the criterion for selecting estimation samples. For U.S. data, we find estimation samples based on similarity in lagged assets perform at least as well as estimation samples based on industry membership at detecting discretionary accruals, both in simulations with seeded accruals between 2% and 100% of total assets and in tests examining restatement data and AAER data. For non-U.S. data, we find industry-based estimation samples result in significant sample attrition and estimation samples based on lagged assets perform at least as well as estimation samples based on industry membership, both in simulations and in tests examining German restatement data, with substantially less sample attrition.

We provide evidence that disclosed items are not processed differently from recognized items when the disclosures are salient, not based on management estimates, and amenable to simple techniques for imputing as-if recognized amounts. For a sample of firms with both capital and operating leases, we find that as-if recognized amounts for leases are generally reliable and that both recognized lease obligations and disclosed lease obligations are associated with proxies for costs of debt and equity. The magnitudes of these associations are not statistically different across accounting treatments, suggesting that market participants impound as-if recognized operating lease obligations and recognized capital lease obligations similarly into costs of capital. Conditioning on the reliability of as-if recognized operating lease obligations, we find a difference in the association between recognized versus as-if recognized lease obligations and proxies for the costs of debt and equity when the operating lease disclosures are less reliable. Data Availability: Data used are available from public sources identified in the study.