The role of Big 6 auditors in the credible reporting of accruals

This study investigates if the use of a Big 6 auditor is increasing in the firm's endogenous propensity to generate accruals. High-accrual firms have greater scope for aggressive and/or opportunistic earnings management and therefore have an incentive to hire a Big 6 auditor to provide assurance that reported earnings are credible, For a large sample of NASDAQ firms over the period 1975-1994 we find that the likelihood of using a Big 6 auditor is increasing in firms' endogenous propensity for accruals. Even though Big-6-audited firms have higher levels of total accruals, we also find they have lower amounts of estimated discretionary accruals. This finding is consistent with Big 6 auditors constraining aggressive and potentially opportunistic reporting of accruals.