Governmental customer concentration and audit pricing

Purpose - The purpose of this paper is to examine how the concentration of a specific customer type – governmental customer, affects the pricing of audit services in the USA. Design/methodology/approach - This paper applies a standard audit pricing model by regressing audit fees on governmental customer concentration and other common determinants of audit fees. This paper also adopts an instrumental variable approach and performs propensity-score matched sample analyzes to mitigate the potential endogeneity problem. Findings - Using data from major customer disclosures of US publicly listed firms from 2000 to 2014, this paper finds that governmental customer concentration is positively associated with audit fees, suggesting that a higher level of governmental customer concentration increases a firm’s audit risks and audit effort. In addition, this paper performs cross-sectional analyzes and show that the association between governmental customer concentration and audit fees is more pronounced for firms with weak internal governance, weak external monitoring and high financial risks. Originality/value - This paper furthers the understanding of the interactive relationships in supply chain systems and adds new evidence to the literature on customer concentration. Prior studies on customer concentration typically treat all customer types in a uniform manner. To the knowledge, this is the first study that separates governmental customers from other types of customers in an audit pricing setting. The findings highlight the importance of examining governmental customer concentration when assessing a firm’s audit risks and audit fees.