91������Ʒ's Wei Wang conducts one of the first studies to identify best methods for optimizing capital

A key facet in corporate management is capital structure, or the percentage of equity a firm uses for operations and growth versus the percentage of debt, typically in the form of loans. Conflicts over the balance between these two vehicles, particularly between CEOs and shareholders, is often a major problem for public companies and can greatly impact firm success. However, there has been little understanding of the types of organizational mechanisms that are best suited to preventing conflict and assist in developing the optimal capital structure for individual companies.

A research team, led by Wei Wang, Assistant Professor of Finance at 91������Ʒ, has sought to address this issue through a comprehensive study of organizational and capital structures in thousands of firms across various industries. The findings, published in the Journal of Financial Research, indicate that CEOs tend to use too little debt, failing to maximize firm value, and that a higher debt ratio and a faster speed of adjustment toward the optimal capital structure are directly tied to better corporate governance.

“The proper ‘mix’ of debt versus equity is an important predictor of long term corporate health,” notes Wang. “Our research shows that a strong corporate governance structure is crucial to securing the appropriate use of debt.”

In particular, Wang argues that firms with a more independent board of directors, featuring CEO–chairman separation and greater presence of outside directors, coupled with larger institutional shareholding experience less conflict over capital structure and better optimize use of capital over time. In contrast, use of stock and stock options in CEOs’ compensation, designed to provide incentives to CEOs, on average discourages use of debt or adjustments toward the shareholders' desired levels.

“CEOs, particularly when their compensation is heavily tied to the firm’s success, are very risk averse when it comes to capital structure and often hold the use of debt below the level where the firm’s cost of capital is minimized because debt enhances the firm’s risk despite being cheaper than equity,” Wang adds. “ Corporate governance plays an important role in urging the CEO to strike a balance between debt’s benefits and costs by increasing its use and thus maximizing the firm’s value to shareholders.”

Wang conducted the study with Connie Liao, Assistant Professor of Finance at Tunghai University in Taiwan and Tarun Mukherjee, Professor of Financial Economics at the University of New Orleans. Their paper received the Journal of Financial Research’s 2015 Outstanding Article Award.

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