Audits of Complex Estimates as Verification of Management Numbers: How Institutional Pressures Shape Practice
73 Pages Posted: 4 Jun 2011 Last revised: 21 Nov 2013
Date Written: November 20, 2013
Abstract
We interview 24 very experienced auditors about how they audit complex accounting estimates such as fair values and impairments and what problems they experience in the process. We find that auditors overwhelmingly choose to audit the details of management’s estimate rather than use other allowable approaches. The steps auditors describe and the language they use to describe the steps indicate that they follow a process of verifying individual elements of management’s assertions on a piecemeal basis, resulting in over-reliance on management’s process, rather than engaging in a critical analysis of the overall estimate. The problems that auditors identify are consistent with this view, and include failures to notice inconsistencies among the estimate and other internal data or external conditions and over-reliance on specialists to identify, evaluate, and challenge critical assumptions. We interpret these processes and problems using institutional theory and identify two root causes: standards’ and firms’ emphasis on verifying management’s model and audit firms’ chosen division of knowledge between auditors and specialists. Institutional theory predicts these conventions arise from firms extending use of procedures that are legitimate in one area (i.e., auditing accounts without uncertainty) to a new area (i.e., auditing complex estimates), even though they are less effective in the new area. They are reinforced by regulators’ method of inspection and by firms’ reluctance to change methods without a prompt to change to a clearly better method. We argue that these conventions thwart auditors’ good-faith attempts to engage in skeptical analysis of estimates.
Keywords: accounting estimates, audit quality, fair value, impairment, interview
JEL Classification: M40, M41
Suggested Citation: Suggested Citation
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