Financial statement comparability and segment disclosure

Statement of Financial Accounting Standards (FAS) No. 131, Disclosures about Segments of an Enterprise and Related Information (FASB [1997]), reestablishes standards for how public business enterprises report segment information in financial statements. A prevailing criticism of FAS 131 is that it likely reduces financial statement comparability for firms with similar lines of business. This study estimates comparability of accounting disclosures surrounding the implementation of FAS 131 to examine potential variation in comparability associated with the segment reporting regime shift. Financial statement comparability is operationalized following the De Franco et al. (2011) accounting system comparability measure as the degree that firms have similar mappings for economic performance into financial statements. Results indicate decreased comparability for firms following FAS 131 adoption. Specifically, segment information reformulated according to how companies manage their businesses marginally limits this reduction in comparability, but greater segment information disaggregation through an increase in the number of reported segments attributed to FAS 131 application diminishes comparability overall. This study contributes to the standard setting process, as the FASB has assigned comparability to an important position in its conceptual framework and has made the goal of increasing comparability a vital component of its agenda that drives the need for accounting standards.