運用機器學習探索事務所之市占率成長幅度與PCAOB檢查報告揭露之審計缺陷之關聯性

Using Machine Learning to Explore the Association Between the Audit Firms' Market Share Growth and Audit Deficiencies Revealed in the PCAOB Inspection Report

陳楹家(Chen Ying-Jia)

指導教授 ： 張祐慈

國立政治大學/商學院/會計學系/碩士(2022年)

https://doi.org/10.6814/NCCU202200556

摘要

本研究旨在探討事務所市占率成長幅度與公開發行公司之會計監督委員會(PCAOB)檢查報告揭露之審計缺陷之關聯。本研究以機器學習作為研究方式，分析大量PCAOB檢查報告中之審計缺陷類型。實證結果顯示，市占率成長幅度在該年排名第90百分位數以上之小型事務所，其發生審計缺陷之機率較排名第89百分位數以下之事務所高1.4251倍，換言之，市占率成長幅度過快，將導致「成長陣痛」，使審計缺陷發生之機率增加，研究結果符合預期。本研究亦發現，市占率成長幅度越高，越可能發生「與財務報表層級相關」以及「與GAAP相關」之二類型審計缺陷。本研究之貢獻在於運用新興機器學習演算提供PCAOB檢查報告之主題分析，研究結果或能闡明事務所市占率成長幅度對PCAOB檢查報告揭露之審計缺陷之影響。

關鍵字

PCAOB檢查報告 ； 機器學習 ； 成長陣痛

並列摘要

The purpose of this study is to explore the association between the growth rate of the audit firm's market share and the audit deficiencies revealed in the Public Company Accounting Oversight Board inspection reports. This study uses machine learning as a research method to analyze the audit defect types in a large number of PCAOB inspection reports. The empirical results show that small audit firms whose market share growth rate is above the 90th percentile in that year are 1.4251 times more likely to have audit deficiencies than those ranked below the 89th percentile. Excessive growth in market share will lead to "growing pains" and increase the probability of audit deficiencies. The research results are in line with expectations. This study also found that the higher the market share growth rate, the more likely two types of audit deficiencies, "related to the financial statement level" and "related to GAAP", will occur. The contribution of this study is to provide a thematic analysis of PCAOB inspection reports using emerging machine learning algorithms, and the findings may shed light on the impact of an audit firm’s market share growth on audit deficiencies revealed by the PCAOB.

並列關鍵字

PCAOB inspection report ； Machine learning ； Growing pain

參考文獻

一、中文文獻

徐佳揚，2021，利用深度學習預測審計失敗--以台灣為例，台灣大學會計研究所碩士論文。

二、英文文獻

Abbott, L. J., K. A. Gunny, and T. C. Zhang. 2013. When the PCAOB talks, who listens? Evidence from stakeholder reaction to GAAP-deficient PCAOB inspection reports of small auditors. Auditing: A Journal of Practice & Theory 32 (2): 1-31.

Acito, A. A., C. E. Hogan, and R. D. Mergenthaler. 2018. The effects of PCAOB inspections on auditor-client relationships. The Accounting Review 93 (2): 1-35.