- 學位論文
審計產業專家對銀行業盈餘品質的影響─2003年博達案前後比較分析
The Impact Of Audit Industry Specialization On Banks’ Earnings Quality ─ Before And After 2003 Procomp Scandal
摘要
2004年台灣內爆發博達弊案，針對此案金管會對相關簽證會計師實施前所未有的嚴厲懲處。杜榮瑞等人(2007)研究指出博達案發生後，會計師對於審計客戶同時提供非審計服務的審計決策影響會降低。這說明當訴訟風險增加時，會計師會較為著重其自身聲譽而非服務公費。但有關此弊案相關研究往往因金融業之行業特殊性而予以排除，為彌補過去研究之不足，本研究主要探討此一重大審計環境改變對銀行業所造成的影響。Hogan and Jeter(1999)指出產業專業化在管制產業中的影響會更為明顯，過去研究亦發現金融業常採裁決性壞帳作為盈餘管理的工具。本研究以McNichols and Wilson(1988)之壞帳估計式估計預期壞帳，以裁決性壞帳之絕對值為盈餘品質之替代變數，並採用Balsam et al. (2003)之五種衡量方法來做為產業專家之替代變數。先檢視產業專家與銀行業盈餘品質之關聯，再以2003年為審計環境變遷的分界點探討博達弊案所造成的環境變遷對銀行業產業專家與盈餘品質關係之影響。實證結果發現，五種產業專家與盈餘品質皆呈顯著負相關，亦即僱用產業專家的銀行其盈餘品質的確較高。加入年的影響後，五種產業專家衡量方法方向符合預期但皆不顯著，但以其中三項虛擬變數另行探討並將樣本分為2003年前後之後，發現部分符合本假說之預期，亦即，博達弊案發生所導致的重大審計環境變更的確會造成查核銀行業之會計師事務所更為保守，促使其能提升銀行客戶之盈餘品質。
關鍵字
產業專家；盈餘品質；博達案並列摘要
The famous Procomp scandal in 2004 in Taiwan aroused public awareness of the role of external auditors. Hogan and Jeter (1999) showed that the effects of audit industry specialization in regulatory industry will be more effective than other industries, so research samples in this research focused on banking industry. We use the absolute value of unexpected bad debt expenses, estimated by McNichols and Wilson (1988) model, as a proxy of earnings quality. On the other way, followed Balsam et al. (2003), five different measures of industry specialists were used to test our hypotheses. In short, the major purpose of this study is to examine whether there is a negative correlation between industry specialists and earnings quality in Taiwan banking industry, before and after 2003. The result showed a significant negative association between five different measures of industry specialists and the absolute value of discretionary bad debt expenses. In other words, audit industry specialists can improve banks’ earnings quality. As we test the interaction between industry specialists and Procomp scandal year dummy, all of the directions of the coefficients are negative, but not significantly. However, as we divide the sample into two parts, before and after 2003, our conjectures are supported partly. These findings implied that the relation between audit industry specialists and earnings quality are effected by the change of legal environment caused by Procomp scandal.