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Abstract(s)
A qualidade da auditoria (QA) desempenha um papel fundamental na garantia da veracidade das informações financeiras, bem como na prevenção de manipulações de resultados (MR) e fraudes por parte da administração das empresas. A literatura sustenta que a experiência do auditor surge como um fator crucial, pois, ao longo da sua carreira, o auditor enfrenta uma variedade de situações e desafios que contribuem para aprimorar a sua capacidade de identificar riscos, aprofundar o seu conhecimento, e tomar decisões mais apropriadas. Esta dissertação tem como objetivo (i) testar se a experiência do auditor tem um impacto positivo na QA e (ii) se não há diferenças no impacto da experiência na QA, para auditores integrados em empresas Big 4 e Não-Big 4. Para avaliar a QA, é utilizada a manipulação de resultados (MR) como proxy, medida através da estimação dos accruals discricionários das empresas auditadas, seguindo o Modelo de Jones Modificado, e é também efetuada uma regressão linear múltipla. A análise foi realizada em 36 empresas portuguesas cotadas na Euronext Lisbon, usando dados de 2018 a 2022, inclusive. Os resultados indicam que a experiência do auditor tem um efeito significativamente negativo na MR, confirmando a hipótese de que auditores mais experientes tendem a produzir auditorias de maior qualidade. Confirmam ainda que não há diferenças neste efeito, entre auditores pertencentes a empresas Big 4 e Não-Big 4.
Audit quality (AQ) plays a fundamental role in guaranteeing the transparency and truthfulness of financial information, as well as preventing manipulation of results and fraud on the part of company management. The literature argues that the auditor's experience is a crucial factor because, throughout their career, the auditor faces a variety of situations and challenges that contribute to improving their ability to identify risks, deepen their knowledge and make more appropriate decisions. This dissertation aims to (i) test the relationship between auditor experience and AQ, and (ii) if there are no differences in the impact of experience on AQ for Big 4 and non-Big 4 auditors. To assess AQ, earnings manipulation (EM) is used as a proxy, measured by estimating the discretionary accruals of audited companies, following the cross sectional Modified Jones Model, and a multiple linear regression is also carried out. The analysis was carried out on 36 Portuguese companies listed on Euronext Lisbon, using data from 2018 to 2022. The results indicate that auditor experience has a significantly negative effect on EM, confirming the hypothesis that more experienced auditors tend to produce higher quality audits. They also confirm that there are no differences in this effect between Big 4 and non-Big 4 auditors.
Audit quality (AQ) plays a fundamental role in guaranteeing the transparency and truthfulness of financial information, as well as preventing manipulation of results and fraud on the part of company management. The literature argues that the auditor's experience is a crucial factor because, throughout their career, the auditor faces a variety of situations and challenges that contribute to improving their ability to identify risks, deepen their knowledge and make more appropriate decisions. This dissertation aims to (i) test the relationship between auditor experience and AQ, and (ii) if there are no differences in the impact of experience on AQ for Big 4 and non-Big 4 auditors. To assess AQ, earnings manipulation (EM) is used as a proxy, measured by estimating the discretionary accruals of audited companies, following the cross sectional Modified Jones Model, and a multiple linear regression is also carried out. The analysis was carried out on 36 Portuguese companies listed on Euronext Lisbon, using data from 2018 to 2022. The results indicate that auditor experience has a significantly negative effect on EM, confirming the hypothesis that more experienced auditors tend to produce higher quality audits. They also confirm that there are no differences in this effect between Big 4 and non-Big 4 auditors.
Description
Keywords
Auditoria Qualidade da auditoria Manipulação de resultados Experiência do auditor Modelo de Jones modificado Accruals discricionários Auditing Audit quality Earnings manipulation Auditor experience Modified Jones model Discretionary accruals