Corporate governance, Sarbanes-Oxley, and small-cap firm performance

The recent debate on the onerous costs of compliance with the Sarbanes-Oxley Act has primarily focused on small firms. I study the effects of SOX compliance on such firms by comparing the performance of Canadian small-cap firms that are subject to SOX provisions with those that are not, while: (a) taking into account firms’ internal and external governance mechanisms, including the market for corporate control, and (b) accounting for the simultaneous interactions between alternative governance mechanisms and firm performance. Firms subject to Sarbanes-Oxley experienced an incremental increase in market valuation ranging between 15.7% and 34% depending on the measure of board independence used in the estimation. Some sub-optimal deployment of the endogenous governance mechanisms is observed, while the market for corporate control serves as a positive disciplining factor.