We argue that conflicting estimates of auditors' industry leadership premia documented in prior research reflect model misspecification. We show that leadership measures can be expected to identify different auditors as leaders depending on the basis (assets, fees or auditee counts) used to...

We use data from internal assessments of audit quality in a Big 4 firm to investigate the impact of audit firm tenure and auditor-provided non-audit services (NAS) on audit quality. We find that first-year audits receive lower assessments of audit quality and that quality improves shortly...