本研究以台灣上市、上櫃及興櫃公司為研究對象，利用問卷發放的方式，探討我國企業公司治理特質與內部稽核對財務報導可靠性貢獻之關係，並調查我國內部稽核之現況，以及內部稽核人員與外部查核人員之互動情形。本研究之實證結果顯示：（1）「公開發行公司建立內部控制制度處理準則」於2005年修訂，規定內部稽核單位應直接隸屬於董事會之後，內部稽核人員普遍認為其地位與獨立性有明顯提升。但我國企業內部稽核規模仍偏低，以1~2人為主；（2）監察人（或審計委員會）複核內部稽核工作之範疇、內部稽核之規模、內部稽核人員與外部查核人員之互動情形等，與內部稽核對財務報導可靠性之貢獻度呈顯著正相關 ；以及（3）針對內部稽核人員與外部查核人員之互動情形（包含工作協調、溝通、外部查核使用內部稽核結果之程度），內部稽核人員的認知普遍優於外部查核人員的認知。 / This paper examines the relationship between corporate governance characteristics and internal auditors’ assessments of their contributions to financial reporting reliability. This study also investigates the current status of internal auditing in Taiwan and the interaction between internal auditors and external auditors. Our results show that (1) since the applicable laws require that the internal audit department must report directly to the board of directors, internal auditors’ independence and position in their companies have improved significantly. However, the number of internal auditors in most companies is still low; (2) the extent to which the supervisors (or audit committee members) review internal audit results, the total numbers of staff in an internal audit department, and the relationship between internal and external auditors are positively related to internal auditors’ contribution to a firm’s financial reporting reliability; and (3) in general, internal auditors’ perceptions of their interactions with external auditors is better than those of external auditors.

極端之租稅規避活動可能導致較高之受查、受罰與聲譽風險。又由一企業之經營策略，可觀察該企業決定如何於選定市場中競爭，且部分上展現了該企業承擔風險與不確定性之意願。因此企業願意承受之風險越高，可能亦較願意從事較激進之租稅規避活動。亦即研究一企業之策略決策，就某種程度而言應可反映企業之租稅規避程度。此外，企業之治理單位，例如：董事會，於企業策略選擇扮演重要角色，因此，分析組織之公司治理特性亦應有助於解釋其租稅規避程度之高低。 針對2001至2011年台灣上市櫃公司實證結果，本研究得到以下結論：(1) 相對於採攻擊者策略之企業，採防禦者策略之企業之有效稅率偏高，表示其從事較低程度之租稅規避活動。(2) 組織之帳面有效稅率顯著受到董監席次控制比例、董監持股比率及經理人持股等三項本研究所採董事會特性為主之公司治理變數所影響。 / A firm’s choice of business-level strategy are likely to determine the level of tax avoidance because the firm strategies are, in part, based on a firm’s willingness to deal with risk and uncertainty. In addition, a firm’s board of directors is influential toward a firm’s major business strategies. Since a firm’s strategies are based on its intent to deal with risks, the choice made by the firm may be able to represent its governance unit’s willingness to bear risks. Therefore, this paper examines to what extent a Taiwanese firm’s business-level strategy and corporate governance characteristics affect its level of tax avoidance. This paper finds that defender firms tend to engage in less tax avoidance than prospector firms, as demonstrated by higher book effective tax rates. This paper also finds that firms with higher voting power hold by the ultimate controlling owner within the board of directors and supervisors tend to have higher book effective tax rates, which suggests lower level of tax avoidance activities. On the contrast, those firms with directors, supervisors, and managers holding more share interests tend to have a lower book effective tax rate, which indicates the firm engages in more tax avoidance activities.