NBER Publications by Ayla Kayhan

Default probability plays a central role in the static tradeoff theory of capital structure. We directly test this theory by regressing the probability of default on proxies for costs and benefits of debt. Contrary to predictions of the theory, firms with higher bankruptcy costs, i.e., smaller firms and firms with lower asset tangibility, choose capital structures with higher bankruptcy risk. Further analysis suggests that the capital structures of smaller firms with lower asset tangibility, which tend to have less access to capital markets, are more sensitive to negative profitability and equity value shocks, making them more susceptible to bankruptcy risk.

This paper examines how cash flows, investment expenditures and stock price histories affect corporate debt ratios. Consistent with earlier work, we find that these variables have a substantial influence on changes in capital structure. Specifically, stock price changes and financial deficits (i.e., the amount of external capital raised) have strong influences on capital structure changes, but in contrast to previous conclusions, we find that their effects are subsequently at least partially reversed. These results indicate that although a firm's history strongly influence their capital structures, that over time, financing choices tend to move firms towards target debt ratios that are consistent with the tradeoff theories of capital structure.