從審計風險與遵循成本檢視沙賓法案（SOX）對審計公費訂價之影響

The Impact of SOX on Audit Pricing: Audit Risk and Compliance Cost

林囿成(Yu-Chen Lin)

指導教授 ： 林嬋娟 ； 劉啟群

國立臺灣大學/管理學院/會計學研究所/博士(2007年)

https://doi.org/10.6342/NTU.2007.02245

摘要

2002年通過的沙賓法案（SOX）對財務報導與審計環境造成重大的改變，本研究利用美國2000至2005年強制揭露的審計公費資料進行實證研究，探討沙賓法案對審計公費訂價之影響。實證結果顯示：審計訂價因為沙賓法案而產生結構性改變，此種改變對大型事務所與非大型事務所的影響不同。沙賓法案後，委任風險因子對審計公費之影響程度變大，但是證實測試風險因子的影響變小；本研究發現會計師將遵循成本（包含SOX Section 404、408、及12月忙季）轉嫁給客戶。實證結果也發現，沙賓法案後大型事務所公費溢酬增加，會計師對於在資本市場籌募資金之客戶收取更高公費。值得注意的是，沙賓法案後對客戶委任風險公費貼水調高的情形，只發生在大型事務所，這顯示大型事務所對客戶的議價能力大於小型事務所，加上更擔心客戶之委任風險，所以在SOX後收取更高的委任風險貼水。

關鍵字

審計訂價 ； 沙賓法案 ； 審計風險 ； 遵循成本 ； 結構改變

並列摘要

The Sarbanes-Oxley Act of 2002 substantially changes the environment of financial reporting and auditing. Using the mandatory audit fees disclosure data from 2000 to 2005, this study examines the impact of SOX on audit pricing. The empirical results show that there is a structure change in audit pricing, and the change pattern differs between Big-N and Non-Big-N. Specifically, for the audit risk factors, the coefficient of engagement risk factor increases, but the coefficient of substantive testing risk decreases in the post-SOX period. As to the compliance costs, it is found that auditors pass their SOX compliance costs (including Section 404, 408, and the audit work concentration for fiscal year ended in December) to their clients. This study also documents an increase in Big-N premium, and more fees are charged to clients raising funds from the capital market. Finally, comparing the Big-N vs. Non-Big-N, the results show that only Big-N audit firms charge more engagement risk premium after SOX. This finding suggests that the Big-N firms are more care about clients’ engagement risk and they tend to charge more engagement risk premium after SOX since they have more bargaining power.

並列關鍵字

audit pricing ； Sarbanes-Oxley Act ； audit risk ； compliance cost ； structure change

參考文獻

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