會計師產業簽證經驗與簽證工作量對財務報表重編之影響

The Impact of Auditors , Industrial Attestation Experience and Audit Workload on Financial Restatements

本研究利用財務報表雙簽制度之特殊審計環境，藉由衡量事務所組織層級與簽證會計師個人層級之產業簽證經驗與簽證工作量，探討其對財務報表重編之影響。實證結果顯示：(1)會計師事務所之產業簽證經驗較長與簽證工作量較多皆有助於降低企業財務報表之重編機率，傾向支持學習效果與專業聲譽假說。(2)僅有第二位簽證會計師之產業簽證經驗會顯著降低企業財務報 表之重編機率，可能係因查核案件主要係由第一位簽證會計師及其帶領之查核組別所負責查核，其效果已反映在事務所組織面效果，導致第一位簽證會計師之個人效果不顯著。此結果傾向支持學習效果，亦間接證實簽證會計師 並未因產業經驗資深而存在過度自信現象。(3)在控制事務所組織面效果後，兩位簽證會計師之簽證工作太高會提高企業財務報表之重編機率，傾向支持忙碌假說。本研究結果在額外考量查核任期、事務所規模、產業專家、財務報表品質、董事會結構後仍呈現穩健。

This study employs the special audit environment with dual attestation to explore the effects of the industrial attestation experience and audit workload on financial restatements from firm-level and partner-level. Empirical results show that the longer industrial attestation experience and larger audit workload of audit firm will reduce restatement likelihood, consistent with the learning effect and professional reputation hypothesis. Second, the industrial attestation experience is related significantly to restatement likelihood for the second signing partner, but not for the first signing partner, and this may be attributed to higher overlapping between the firm-level effect and the first partner-level effect. These results tend to not only support the learning effect, but also reject indirectly that auditors with longer industrial attestation experience are overconfident. Moreover, after controlling for firm-level, the restatement likelihood increases as the more audit workload for both the first and second partners. This evidence is consistent with the busyness hypothesis. Our findings are qualitatively similar even if taking into account the auditor tenure, auditor size, industry expertise, quality of financial reporting, and board structure.