study of the potential information content of BTDs. She focuses on deferred tax timing differences and tests whether BTDs affect the persistence of earnings, cash flows and accruals. She hypothesizes that firms with the most extreme BTDs (whether positive or negative) will have less persistent book earnings and that the accrual portion of earnings will have less persistence for these firms.45 She finds that firms with the most extreme BTDs experience less persistence in earnings, accruals, and cash flows, thus indicating that extreme book-tax differences are associated with lower earnings quality.