Abstract This article incorporates well-documented managerial traits into a tradeoff model of capital structure to study their impact on corporate financial policy and firm value. Optimistic and/or overconfident managers choose higher debt levels and issue new debt more often but need not follow a pecking order. The model also surprisingly uncovers that these managerial traits can play a positive role. Biased managers' higher debt levels restrain them from diverting funds, which increases firm value by reducing this manager-shareholder conflict. Although higher debt levels delay investment, mildly biased managers' investment decisions can increase firm value by reducing this bondholder-shareholder conflict.

ABSTRACT This paper develops a real options framework to analyze the behavior of stock returns in mergers and acquisitions. In this framework, the timing and terms of takeovers are endogenous and result from value‐maximizing decisions. The implications of the model for abnormal announcement returns are consistent with the available empirical evidence. In addition, the model generates new predictions regarding the dynamics of firm‐level betas for the period surrounding control transactions. Using a sample of 1,086 takeovers of publicly traded U.S. firms between 1985 and 2002, we present new evidence on the dynamics of firm‐level betas, which is strongly supportive of the model's predictions.