The Jointness of Audit Fees and Demand for MAS : A Self-Selection Analysis

This paper has two objectives: (1) providing a method to evaluate directly the costs (benefits) of knowledge spillovers arising from purchasing MAS from the incumbent auditor, and (2) examining the effect of estimates of the cost of auditor change on clients' ability to capture the resulting cost savings. The first is achieved by using self selection bias parameters estimated from switching regressions. The latter is based on data generated from clients' assessments of auditor change costs and the related economic conditions. For a sample of 84 companies, the results indicate that purchasing MAS from the incumbent auditor does not have a bearing on audit fees. The paper also provides an application of the Heckman-Lee method of correcting for self-selection bias