审计师变更与盈余管理关系的实证研究--来自中国A股市场的经验证据

通过对2001～2003年A股上市公司的实证研究发现:审计师变更与公司可操纵应计利润的增长具有显著正相关关系,且两者关系在不同年度、不同前期审计意见的情况下有所不同.这表明,一方面审计师变更影响到后任审计师的独立性,即公司能够通过更换审计师实现盈余管理的目标;另一方面,对前期非标审计意见的公司,审计师采取了较为谨慎的做法,且伴随着监管政策的逐渐强化,后任审计师的独立性逐年提高.     

非标准审计意见足以保护审计师吗?——基于证券执法的证据

本文以2001—2012年93家因虚假陈述被证监会惩戒的公司和39家审计师被同时惩戒的公司为研究样本,采用Bivariate probit和两阶段最小二乘法模型对审计意见和审计师惩戒之间的关系进行了验证。研究结果表明,我国审计师出具非标意见反而越易受到惩戒,且惩戒程度也越高的悖论,这与我们的预期不符。而进一步研究发现,这是由于审计意见变通所导致。监管部门有效发现了审计意见变通行为,因此审计师仅出具非标意见不足以保护自身,只有有效披露公司的重大错报,出具正确恰当的审计意见才可以远离惩戒。本文的研究对于正确认识审计师惩戒有着重要的启示,同时为监管机构出台更加有效的审计监管政策提供一定的借鉴。     

审计师变更之管理层与审计师博弈：模型与抉策

审计师的变更具有经济后果。管理当局通过变更审计师，购买有利的审计意见或是通过提出变更审计师威胁审计师的独立性，都将有损审计质量。本文通过构建管理层与审计师的博弈模型，分析可能影响其行为决策的因素，以期对我国审计师变更监管政策的制定存所帮助。     

盈余管理 审计师变更与审计师独立性

盈余管理与审计师变更存在一定的相关性。本文检验了审计师变更公司在新任审计师的第一年、前任审计师最后一年、倒数第二年的可操控性应计利润及其在不同年份之间的变化。检验结果表明 ,虽然前任审计师在其最后一年聘期内采取了比其他审计师更为稳健的会计处理方法 ,以致被公司变更 ;但新任审计师在第一年并未完全配合公司。这在一定程度上表明 ,公司变更审计师并未达到预期的目的 ;前任审计师、后任审计师的独立性均很强。这可能要归功于事务所脱钩改制 ,以及有关部门有效的监管措施     

审计师性别和审计质量相关性实证研究

本文以2007-2009年沪市公司为研究对象,实证分析了这些上市公司的审计师性别差异与审计质量之间的关系。研究发现,签字注册会计师中女性审计师占的比例越大,所审计的公司操控性应计越低,两个审计师如果都是女性其操控性应计最低;签字注册会计师中女性审计师占的比例越大,越可能签署非标意见,两个审计师如果都是女性,最可能签署非标意见。进一步研究发现,女性审计师签署非标意见受上一期审计意见、本期操控性应计和自身学历的显著影响。     

本地审计师的合谋效应

本文结合公司的信息不对称程度,从审计收费与审计质量的角度来研究本地审计师的合谋效应问题。研究结果表明,异常审计收费降低了本地审计师对信息不对称程度高的盈余管理公司出具非标审计意见的概率,而并不会降低本地审计师对信息不对称程度低的盈余管理公司出具非标审计意见的概率,同时,异常审计收费也不影响外地审计师出具非标审计意见的概率,表明本地审计师与信息不对称程度高的盈余管理公司之间存在合谋行为;进一步研究表明,信息不对称程度高的盈余管理公司更可能选择本地审计师进行审计,从而为本地审计师的合谋效应提供了进一步的证据。     

会计事务所组织形式、法律责任与审计质量——基于签字审计师个体层面的研究

本文从签字审计师个体层面研究了会计事务所组织形式对审计质量的影响。与有限责任制相比,特殊普通合伙制将审计法律责任与风险落实到了签字审计师个人,增加了审计师的违规成本,因此审计师可能会变得更加独立和谨慎。研究表明,同一签字审计师同年在特殊普通合伙制身份下比在有限责任制身份下更容易出具非标审计意见,其审计公司的盈余管理水平更低,审计质量更高。同时,我们还发现,事务所从有限责任制转变为特殊普通合伙制以后,相同签字审计师转制后出具非标审计意见的可能性更高,而且被审计公司的盈余管理水平更低,审计质量也明显提高。这些结果为我们判断2010年以来我国推动事务所转制为特殊普通合伙制的政策提供了直接的经验证据,表明特殊普通合伙制对审计师的审计行为产生了预期的政策治理效果,有助于事务所做强。     

上市公司违规处罚与审计师更换——基于“一会两所”处罚案例的分析

本文以2002-2009年被中国证券监督委员会及上海和深圳证券交易所处罚且违规行为与审计师相关的上市公司为样本,研究上市公司被处罚后审计师更换的选择行为以及更换审计师对避免再次处罚的效果。结果表明,相对于未受处罚的公司,被处罚公司更倾向于更换审计师;相对于上一年被出具非标审计意见的被处罚公司,上一年被出具标准审计意见的被处罚公司更倾向于更换审计师;上一年被出具标准审计意见的被处罚公司,更换审计师的行为能够有效抑制再次被处罚事件的发生。     

审计收费、审计师变更与意见购买

实证研究表明,虽然变更审计师增加了上市公司年报被出具非标准审计意见和审计意见恶化的可能性,但是审计师变更更为显著地提高了审计意见改善的可能性;审计收费异常增加与被出具非标准审计意见和审计意见恶化的可能性负相关.公司管理层在一定程度上可以成功实现审计意见购买的动机.此外,异常审计收费、审计收费异常增加和异常降低与审计师变更之间不存在显著的交互效应.     

审计师变更的经济后果研究——来自中国证券市场的经验证据

本文运用2002—2008年我国上市公司数据研究了审计师变更的经济后果。以公司市场价值与其财务盈利的相关系数(简称为盈利可信度)作为审计师变更的经济后果的替代变量,通过研究我们发现:审计师变更总体上降低了上市公司的盈利可信度;变更前一年度财务报告被出具非标准审计意见或者处于财务困境的公司,发生审计师变更使其盈利可信度下降的程度更大;出于对审计服务级差需求的审计师变更,无论是升级变更还是降级变更公司的盈利可信度均显著高于同级变更的公司,而升级变更为声誉较好的国际四大会计师事务所带来的盈利可信度的提高程度最大;审计委员会的设立与否以及上市公司的盈余管理程度对于审计师变更的经济后果没有显著影响,这可能是由于我国上市公司审计委员会的独立性不强以及投资者对上市公司的盈余管理行为识别不足造成的。研究结论同时还说明审计意见分歧、上市公司财务困境以及对审计服务的级差需求是我国上市公司变更审计师的主要原因。本文的研究发现有助于包括上市公司、会计师事务所、投资者以及证券市场监管部门在内的信息使用者更好地理解和评价我国证券市场中的审计师变更现象,并为相关领域的研究提供了新的经验证据。     

Auditor Concentration: A Replication and Extension for the UK Audit Market 1991–1995

This paper examines the issue of auditor concentration in the UK during the period from 1991 to 1995. It shows that in 1995 the Big Six held 75% of the total number of audits and collectively earned 92% of the total audit fees. There was only a small increase in auditor concentration during the five year period, resulting from companies switching from small audit firms to Big Six and newly listed companies choosing a Big Six firm. The paper also examines auditor concentration within industries. Finally, the study assesses the measurement methods most commonly used in auditor concentration studies.     

审计师变更与审计质量:一个理论分析

本文通过建立股东、管理层和审计师三方参与的两委托人-单代理人博弈模型,研究了固定审计费用下不同审计师变更方式对审计质量的影响。研究结果表明,审计师强制性单期变更与审计师强制性定期变更下,审计师与管理层之间的合谋将导致严重的财务舞弊;而在审计师自愿性变更下,股东可以利用解聘现任审计师这一威胁来阻止审计师和管理层之间的合谋,使得审计师和管理层的最优策略均为真实披露公司的盈余信息,并发表标准无保留审计意见。     

Does Ethical Culture in Audit Firms Support Auditor Objectivity?

The suggested cause of constrained auditor objectivity has been centred on auditors' financial incentives and long audit tenure. Recent research has challenged those assumptions and questioned the effectiveness of auditor rotation to counteract short-tenure threats to auditor objectivity. Audit firms and regulators need to adopt methods for enhancing auditor objectivity that are effective in various auditor–client relationships. This study examines whether audit firm ethical culture is positively related to auditor objectivity. Based on the responses of 281 practising auditors, the findings indicate that auditors are more likely to make objective judgments in ethical cultures characterized by the rewarding of ethical behaviour and punishment of unethical behaviour, prevalence of ethical norms, visible ethical leadership, and low emphasis on obedience to authority. In conclusion, evidence indicates that auditors in audit firms with a strong ethical culture are more likely to maintain auditor objectivity than are auditors in less supportive cultures. This suggests that audit firms should promote a strong ethical culture to reduce the risk of constrained auditor judgment.     

监管风险、事务所规模与审计质量

我国会计师事务所规模与审计质量之间是否存在正相关关系,现有研究一直存在争议。本文从注册会计师的执业环境出发,对此进行了重新审视。用上市公司实际控制人的控制权与现金流权之差衡量事务所面临的监管风险,研究发现,大事务所只对监管风险较高的客户提供高质量的审计服务。进一步的研究表明,事务所面临的监管环境改善后,大事务所才对所有客户提供高质量的审计服务,审计质量与事务所规模之间的正相关关系不再依赖监管风险而存在。因此,在法律环境相对薄弱的情况下,加强监管是促使会计师事务所提供高质量审计服务的有效机制。     

Does Opinion Shopping Impair Auditor Independence and Audit Quality?

This study investigates how companies' threats to dismiss auditors and their engagement in opinion shopping influence auditor independence and audit quality, which in turn affect misstatements in financial statements. It also examines how outsiders' reactions to auditor switching influence opinion shopping. The results indicate that neither the predecessor auditor's nor the successor auditor's independence is compromised by dismissal threats and opinion shopping. Further, the successor auditor's audit quality exceeds the predecessor auditor's audit quality. In addition, auditor switching decreases potential understatements and increases potential overstatements in financial statements, and the capital market's and the successor auditor's reactions to auditor switching reduce the benefits of opinion shopping to companies. Additionally, the study sheds some light on the potential effects of both the Sarbanes‐Oxley's restriction on non‐audit services and mandatory auditor rotation or retention. The paper also derives a rich set of empirical implications.     

How Do Various Forms of Auditor Rotation Affect Audit Quality? Evidence from China

The Enron/Arthur Andersen scandal has raised concerns internationally about auditor independence, audit quality, and the need for regulatory action such as mandatory auditor rotation. China's unique institutional features provide a setting in which we can compare comprehensively the various forms of auditor rotation at different levels (partner vs. firm) and in different settings (voluntary vs. mandatory). In addition, institutional conditions vary dramatically across China, which provides us with an opportunity to test whether the development of market and legal institutions affects the impact of rotation on audit quality. We expect that auditors are less (more) constrained by market forces and less (more) self-disciplined to maintain audit quality in regions with less (more) developed market and legal institutions. Therefore, mandatory rotation may play a more (less) important role in less (more) developed regions. Using auditors' propensity to issue a modified audit opinion (MAO) as a proxy for audit quality, we find that firms with mandatory audit partner rotations are associated with a significantly higher likelihood of an MAO than are no-rotation firms. However, this effect is restricted to firms located in less developed regions. We find similar evidence for voluntary audit firm rotation although the significance level is much weaker than for mandatory partner rotation. Other forms of auditor rotations (i.e., mandatory audit firm rotation and voluntary audit partner rotation), have no effect on MAOs.     

Auditor Fees, Market Microstructure, and Firm Transparency

Abstract:  Auditors, as corporate insiders, have access to private information regarding the firm's financial and business opacity that is unavailable to outside investors. We test whether auditors price their knowledge of firm opacity in their audit fees by examining two competing hypotheses. The first states that higher audit fees may reflect the greater risk that the auditor faces in auditing an opaque firm. Under this hypothesis, market based measures of opacity will be positively correlated with higher fees. The second hypothesis states that firms buy reputational capital from their auditor by paying high fees in an attempt to improve the market's perception of the firm's transparency. In this case, higher audit fees are negatively correlated with market based measures of opacity. Our results are consistent with the first hypothesis, that auditors price opacity risk into their fees.     

The Simultaneous Relation Between Auditor Switching and Audit Opinion: An Empirical Analysis

Previous studies examining the relation between the audit opinion and auditor switching assume a one-way causation, with the issuance of a qualified opinion triggering a switch. However, analytical studies dealing with auditor independence issues (e.g., Magee and Tseng, 1990; Dye, 1991; Teoh, 1992) suggest an opposite causation, in which the auditor is less likely to qualify the opinion for a client who may switch auditors. Some evidence of an opposite causation is provided by Krishnan (1994), who finds that auditors treat switchers more conservatively (relative to non-switchers) in issuing the audit opinion. The causation between switching and the audit opinion is clearly important for policy decisions regarding both opinion shopping and auditor independence. In this paper, we test the two-way causation hypothesis and find evidence in support of a two-way causation. Our simultaneity-adjusted estimates confirm previous findings of a positive effect of a qualified opinion on switching (Chow and Rice, 1982; Craswell, 1988; Citron and Taffler, 1992). However, we find in addition that auditors are more likely to issue qualified opinions to switchers. This finding does not support the analytical studies cited earlier.     

审计委员会特征与会计师事务所变更的经验研究

本文以会计师事务所变更为视角,探讨具备怎样特征的审计委员会才能有效履行其职责。研究表明:审计委员会的独立性和专业性与会计师事务所变更显著负相关;审计委员会的开会次数与会计师事务所变更没有显著关系,说明审计委员会的存在有助于减少会计师事务所变更。但在对会计师事务所变更的进一步研究中,我们并没有发现会计师事务所变是为了追求更高审计质量的进一步证据,也说明审计委员会对会计师事务所变更的影响仍然有限。这些研究结论为完善我国审计委员会制度提供了经验证据。     

The Impact of Managing Director Changes and Financial Distress on Audit Qualification and Auditor Switching

Abstract:   This study examines the interactive effects of change in managing director/chief executive officer (MD) and financial distress together with five control variables (type of audit firm; audit fees; gearing; time; and company size) on first, audit opinion and secondly on auditor switching. Based on a sample of 297 UK listed companies between 1987 and 2001, we find that companies that are financially distressed and change their MD are most likely to receive a qualified audit report, ceteris paribus . In addition, we find evidence of both familiarity and intimidation threats and that the probability of a switch increases with the severity of qualification.