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Hye-Jung Seon

Hanyang University · Business, Management and Accounting

About the Lab

Professor Hye-Jung Seon's research lab specializes in auditing, corporate governance, and financial reporting quality, with a strong focus on audit quality, earnings management, and the role of auditors in corporate transparency. Her work explores how audit partner expertise, client characteristics, and institutional environments influence audit outcomes and financial reporting conservatism. The lab investigates critical issues such as opinion shopping, audit fee pressures during crises, and the impact of ownership structures on accounting choices, particularly in emerging markets like South Korea. A recurring theme is the interplay between auditor behavior, firm governance, and information quality in capital markets.

audit qualityfinancial reporting conservatismauditor expertisecorporate governanceearnings management

Research Overview

Papers
35
Total Citations
271
Papers (5y)
14
Primary Field
Business, Management and Accounting

Research Output Trend

Figures are computed from collected data and may differ slightly.

Publications per year (5y)
14total
2020
2021
2022
2024
2025
Citations per year (5y)
54total
20202021202220242025

Selected Papers

15
1
Article|86 citations·2018
Opinion Shopping to Avoid a Going Concern Audit Opinion and Subsequent Audit Quality
Heesun Chung, Catherine Heyjung Sonu, Yoonseok Zang, Jong‐Hag Choi
SJR Q1Auditing A Journal of Practice & Theory

SUMMARY Despite regulatory concerns over opinion shopping (OS) behavior, there exists little systematic evidence on the prevalence and consequences of OS to avoid a going concern opinion (GCO). Using Lennox's (2000) framework to identify OS, we find that distressed firms successfully engage in OS to avoid a GCO. Moreover, clients engaging in OS exhibit a higher ex post Type II error rate in audit opinions than clients that do not, and the higher Type II error rate is salient for clients switchin

AccountingBusiness, Management and Accounting
2
Article|35 citations·2016
Audit fee pressure and audit risk: evidence from the financial crisis of 2008
Catherine Heyjung Sonu, Hyejin Ahn, Ahrum Choi
SJR Q3Asia-Pacific Journal of Accounting & Economics

This paper investigates whether the downward pressure on audit fees during crisis affects the audit fee structure. The empirical results reveal the following: First, audit fees dropped significantly during the financial crisis period. Second, auditors respond differently to small clients and risky clients when facing downward pressure on audit fees. Finally, the above mentioned findings are more pronounced when the client is under high pressure to reduce expenses. Collectively, the above results

AccountingBusiness, Management and Accounting
3
Article|28 citations·2016
Audit partner’s length of audit experience and audit quality: evidence from Korea
Catherine Heyjung Sonu, Ahrum Choi, Joonil Lee, Wonsuk Ha
SJR Q3Asia-Pacific Journal of Accounting & Economics

This paper investigates the relation between the length of an audit partner’s experience as a certified public accountant and audit quality. Audit quality is measured by the magnitude of discretionary accruals and tendency to meet or miss earnings benchmarks of the client firms. This paper documents that an audit partner’s experience is positively associated with audit quality and the association is more salient among non-Big 4 auditors. These findings suggest that auditors’ knowledge and expert

AccountingBusiness, Management and Accounting
4
Article|24 citations·2013
Determinants of human resource investment in internal controls
Jong‐Hag Choi, Joonil Lee, Catherine Heyjung Sonu
SJR Q2China Journal of Accounting ResearchOA

Using the unique reporting environment in Korea, this study investigates the determinants of human resource investment in internal controls for 1352 listed firms disclosing the number of personnel who are in charge of internal control-related tasks (IC personnel) from 2005 to 2008. We find that the number of IC personnel within a firm and several key departments increase with firm size, number of employees, complexity and for Chaebols, and decrease in rapidly growing firms. Additional analysis r

AccountingBusiness, Management and Accounting
5
Article|19 citations·2014
Separation of corporate ownership and control and accounting conservatism: evidence from Korea
Myung‐In Kim, Catherine Heyjung Sonu, Jong‐Hag Choi
SJR Q3Asia-Pacific Journal of Accounting & Economics

This study analyzes how the separation of corporate ownership and control affects financial reporting conservatism using unique data on Korean chaebol-affiliated firms. The presence of severe agency problems generated by the wedge between ownership and control may increase the demand for conservatism, while the greater managerial motivation and latitude in making accounting choices borne by the entrenchment problems can adversely affect the degree of financial reporting conservatism. We find tha

AccountingBusiness, Management and Accounting
6
Article|17 citations·2020
The effect of audit partner style on financial statement comparability
Hyejin Ahn, Catherine Heyjung Sonu
SJR Q3Asia-Pacific Journal of Accounting & Economics

Several studies provide evidence that auditors play an important role in the implementation of accounting comparability. We extend this line of research by examining whether comparability in accounting earnings between two firms is affected by auditor industry expertise measured at the partner level. Using 45,741 pairs of firms over the period 2003–2016, we find that the accounting comparability between two firms in a pair is higher when they are audited by the same expert partner than when they

AccountingBusiness, Management and Accounting
7
Article|15 citations·2022
Do business trainings for audit committees matter in organizations? Focusing on earnings management
Bomi Song, Heesun Chung, Bum‐Joon Kim, Catherine Heyjung Sonu
SJR Q1Finance research letters
AccountingBusiness, Management and Accounting
8
Article|12 citations·2022
Information quality and IPO underpricing: The role of underwriter pricing and allocation powers
Catherine Heyjung Sonu
SJR Q1Pacific-Basin Finance Journal
AccountingBusiness, Management and Accounting
9
Article|8 citations·2018
Opinion Shopping to Avoid a Going Concern Audit Opinion and Subsequent Audit Quality
Jong‐Hag Choi, Heesun Chung, Catherine Heyjung Sonu, Yoonseok Zang
SSRN Electronic JournalOA

Despite regulatory concerns over opinion shopping (OS) behavior, there exists little systematic evidence on the prevalence and consequences of OS to avoid a going concern opinion (GCO) in today’s audit environment. Using 11,628 distressed sample firms over the period 2004–2012 and Lennox’s (2000) framework to identify OS, we find that distressed firms successfully engage in OS to avoid a GCO. Moreover, clients engaging in OS exhibit a higher ex post Type II error rate in audit opinions than clie

AccountingBusiness, Management and Accounting
10
Article|5 citations·2016
The Impact of the Sarbanes-Oxley Act on Clients` Audit Opinion Shopping Behavior
Jong Hag Choi, Heesun Chung, Catherine Heyjung Sonu, Yoonseok Zang
Institutional Knowledge (InK) - Institutional Knowledge at Singapore Management University (Singapore Management University)

This study investigates whether the tendency for audit clients to engage in opinion shopping becomes weaker after the enforcement of the Sarbanes-Oxley Act (SOX). While Lennox (2000) provides evidence that U.K. firms successfully engage in opinion shopping, there is limited evidence on the mitigating effect of SOX on opinion shopping. Using observations collected from the period before and after the enforcement of SOX (year 2001, 2004 and 2005), we find that, for our sample period, firms are lik

AccountingBusiness, Management and Accounting
11
Article|4 citations·2010
The Effect of the Wedge between Voting Right and Cash Flow Right on Error in Analysts’ Earnings Forecasts
Catherine Heyjung Sonu, Jong‐Hag Choi, 이병희
SJR Q4Korean Accounting Review
AccountingBusiness, Management and Accounting
12
Article|4 citations·2024
The effect of dividend tax reform on earnings management: Evidence from a natural experiment in Korea
Catherine Heyjung Sonu
SJR Q1Finance research letters
AccountingBusiness, Management and Accounting
13
Article|3 citations·2020
The Effect of Accruals Quality on Split Bond Ratings
Catherine Heyjung Sonu
SJR Q4Korean Accounting Review

This study examines whether good accruals quality is associated with less disagreement among credit rating agencies. Distinct from prior studies that focus on equity analysts, I examine how the quality of financial information influences rating agencies in determining bond ratings. Precise accounting information reduces the information risk of the users of the financial statements such as the credit rating agencies, and thereby affects the frequency and magnitude of split bond ratings by credit

FinanceEconomics, Econometrics and Finance
14
Article|3 citations·2018
The Association between the Number of Auditors as a Proxy for Audit Market Competition and Audit Quality
Wonsuk Ha, Catherine Heyjung Sonu, Jong‐Hag Choi, Ahrum Choi
SJR Q4Korean Accounting Review
AccountingBusiness, Management and Accounting
15
Article|2 citations·2017
Audit Fee Structure, Financial Crisis and Corporate Governance
Catherine Heyjung Sonu, Ahrum Choi, Hyejin Ahn
Korean Accounting Journal

This study examines the effect of corporate governance on audit fees and audit hours during the financial crisis and pre-crisis periods. While the literature on the effect of corporate governance on audit fees is replete, the results are still mixed. By exploiting the crisis setting which represents exogenous shock unrelated to governance choices or auditing, we find that firms with strong corporate governance pay significantly higher audit fees and purchase additional audit hours. We also find

AccountingBusiness, Management and Accounting

Research Areas

AccountingManagement Science and Operations ResearchAerospace EngineeringFinanceStrategy and ManagementEconomics and Econometrics

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