| Summary: | 碩士 === 中國文化大學 === 會計研究所 === 98 === Due to the changes in economic circumstances, nowadays CPA firms not only provide audit services, but also nonaudit services. Whether or not the purchase of nonaudit services will impair auditor independence has become the focus of a grow-ing body of accounting researches. Based on the researches of Frankel et al.(2002), Ashbaugh et al. (2003), and Gul et al. (2007), this study examines whether the im-pact of nonaudit services on auditor independence is contingent on auditor tenure. The results show that there is a positive association between nonaudit fees and posi-tive discretionary current accruals, a proxy for auditor independence, for firms with long auditor tenure of more than three years. These findings suggest that the high nonaudit fees have a negative impact on auditor independence when auditor tenure is long.
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