本篇論文沿用Ashbaugh et al. (ALM) (2003)的實證研究，並採用台灣2004年至2007年上市櫃公司及興櫃公司資料以檢驗非審計公費與財務報表品質之關聯性。本研究採用裁決性應計數作為財務報表品質之代理變數。本研究實證結果如下： 首先，我們發現非審計公費總金額與裁決性應計數間存在顯著正相關之關聯性。隨後，我們將樣本依照是否被沙賓法案禁止，區分為沙賓禁止非審計服務與沙賓部分禁止非審計服務，並提供證據顯示沙賓法案確實可以些微增強財務報表品質。最後，我們將樣本依照非審計公費細項揭露的分類分成四類(即系統設計、工商登記、人力資源與其他)，並發現各項分類非審計服務對於財務報表品質存在不同程度之個別影響。本篇研究清楚的指出台灣加強會計師獨立性與財務報表品質之重要性，並提供台灣金融監管機關修訂相關法規之政策意涵。本篇論文支持沙賓法案的實施，並呼籲台灣金融監管機構嚴格化現行相關法規。

This paper follows Ashbaugh et al. (ALM) (2003) empirical test and uses Taiwan data from year 2004 to 2017 to examine the relationship between nonaudit fees and financial reporting quality, adapting discretionary accruals as proxy. We provide strong evidence showing that total nonaudit fee is significantly positive associated with discretionary accruals. We then observe that the Sarbanes–Oxley Act (SOX) could marginally enhance financial reporting quality. Finally, providing different categories of nonaudit services to audit clients has varying degrees of impact on discretionary accruals. Our empirical results indicate the effectiveness of implementing the SOX and lend support for the financial supervisors in Taiwan to amend relevant regulations accordingly.

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