SYNOPSIS
Audit transaction anomalies can be viewed as outliers. Unsupervised learning methods of outlier detection do not require outcome labels and enable auditors to discover possible problems based on observed transaction patterns. This study develops a framework for using outlier detection methods in audit selection and evaluates the proposed framework on real-world revenue subledger datasets. The results indicate that the proposed framework could facilitate the identification of relevant outlier detection algorithms and effectively select risky observations.
JEL Classification: M42; M40; C45.
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2024