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Publications and Working Papers

Corporate Boards and Regulation: The Effect of the Sarbanes-Oxley Act and the Exchange Listing Requirements on Firm Value, forthcoming, Journal of Corporate Finance    

Abstract: The Sarbanes-Oxley Act of 2002 and recently modified exchange listing requirements impose uniformly high levels of outside director monitoring on all firms. However, recent research in finance suggests that corporate governance structures, including boards of directors, are chosen endogenously by firms in response to their unique operating and contracting environments. Using the relative costs and benefits of outside director monitoring as a benchmark, I find significant cross-sectional variation in the wealth effects around the announcement and passage of these regulations. I find that firms which have high monitoring costs and fewer benefits from outside monitoring benefited less from the regulations. In particular, I find that the wealth effects around the passage of these new regulations are positively related to firm size and age, and negatively related to growth opportunities and the uncertainty of the firm’s operating environment. The results suggest that a blanket “one size fits all” governance regulation may be detrimental to certain firms, particularly young, small, growth firms operating in uncertain business environments, that are costly for outsiders to monitor. [pdf (238 KB)] 

 

 

Institutional Investors and the Long-Run Performance of Private Placements (with Michael Hertzel and James Linck)

Abstract : Recent research has documented the long-run negative post-announcement stock price performance of equity issuers including that of firms that place equity privately. In this study, we document that this negative long-run stock underperformance is limited to firms that experience a decrease in institutional ownership around the private placement. Firms that increased their institutional ownership do not underperform their portfolio benchmarks in the three years following the private placement. We also find that operating performance declined significantly in the two years following the private placement, in firms that experienced a decrease in institutional ownership around the private placement. We find no such decline in the sample of firms that experienced an increase in institutional ownership. This difference in long term performance does not appear to be driven by activism on the part of the institutions. We do not find any significant difference in corporate governance changes between those firms that experienced an increase in institutional ownership and those that experienced a decrease. The results in this paper provide strong evidence for the “smart money” hypothesis. Institutions are better able to identify superior private placements, at the the time of the placement, and increase their holdings in these firms accordingly. [pdf (193 KB)] 

 

 

Endogeneity and the Dynamics of Corporate Governance

Abstract : There is growing evidence that corporate governance and firm performance are not strictly exogenous; both are jointly determined by (partially) unobservable variables and in addition, corporate governance adjusts to past firm performance. Ordinary least squares and fixed effects cross-sectional regression analyses of the relationship between corporate governance and firm performance do not adequately control for these sources of endogeneity and may be biased. I estimate the relationship between governance and performance using a generalized method of moments estimator that controls for unobserved heterogeneity, allows governance and performance to be jointly determined and also allows governance to adjust to changes in past firm performance. In a panel of over 6,000 firms between 1991 and 2003, I find no relationship between any aspect of board structure or inside ownership, and firm performance. The results stand in contrast with some of those from prior studies that suggest an inefficient exogenous relationship between certain aspects of corporate governance and firm performance. The results support the alternative hypothesis that corporate governance structures are, in general, efficiently determined by firms in response to their specific contracting and competitive environments. [pdf (363 KB)] 


Contact Info
Modupe 'Jide' Wintoki 
Ph.D. Student

288A Brooks Hall
Department of Banking and Finance 
Terry College of Business 
University of Georgia 
Athens, GA 30602

Office: 706-542-7175 
jwintoki@terry.uga.edu