Internal auditors and the external audit: a transaction cost perspective

Abstract

Questions exist regarding the extent to which internal auditors should participate in the external audit, and wide variations are observed in practice. Many professional bodies increasingly advocate the view that increased coordination between the internal and external auditors, including increased use of the internal auditor for the external audit, provides more efficient and effective audit coverage. However, others maintain that internal auditors should not focus on areas that are the subject of external audit interest. This article attempts to shed light on this debate by using insights from transaction cost economics (TCE) to identify conditions under which organizations encourage internal audit participation in the external audit. An analysis of survey data collected from directors of Canadian internal audit departments indicate that some (TCE) variables, particularly transaction‐specific investment, are significantly associated with internal audit participation in the external audit.

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