Our results cover audit fee and financial and governance data from 2000 to 2006. The
period after the passage of SOX in July 2002 is especially interesting in that the legislation
may have created a “natural” experiment to study the impact of increased corporate
governance. SOX forced many companies to incur substantial resources on governance,
including increased fees for auditing and internal control that they might not otherwise
have incurred (Hartman, 2007). Such audit fee increases have been partly explained in
terms of increased effort and risk sharing by the auditor as a result of additional liability
under SOX (Dyck et al., 2007; Griffin and Lont, 2007). Yet, after controlling for differences
in effort and risk sharing, we document two further possible influential factors, namely,
that the audit fee increases following the passage of SOX vary positively with proxies for
corporate governance and negatively with the interaction of such governance proxies and
audit risk.
Our results cover audit fee and financial and governance data from 2000 to 2006. The
period after the passage of SOX in July 2002 is especially interesting in that the legislation
may have created a “natural” experiment to study the impact of increased corporate
governance. SOX forced many companies to incur substantial resources on governance,
including increased fees for auditing and internal control that they might not otherwise
have incurred (Hartman, 2007). Such audit fee increases have been partly explained in
terms of increased effort and risk sharing by the auditor as a result of additional liability
under SOX (Dyck et al., 2007; Griffin and Lont, 2007). Yet, after controlling for differences
in effort and risk sharing, we document two further possible influential factors, namely,
that the audit fee increases following the passage of SOX vary positively with proxies for
corporate governance and negatively with the interaction of such governance proxies and
audit risk.
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