I analyze market-order execution quality using order-based data reported in accordance with Securities and Exchange Commission Rule 11Ac1-5. These data facilitate a comprehensive investigation of multiple dimensions of execution quality, including measures of costs and speed, for large samples of common stocks on Nasdaq and the NYSE. The evidence is consistent with competitive equity markets. Overall execution costs on Nasdaq exceed those on the NYSE, but orders execute faster. This relationship reverses for larger orders exceeding 1,999 shares. The apparent trade-off between costs and speed suggests that inferring execution quality from costs alone could be problematical. It also illustrates the need for models of trader behavior that can accommodate multiple dimensions of execution quality.

We offer an explanation for why raiders do not acquire the maximum possible toehold prior to announcing a takeover bid. By endogenously modeling the target firm's value following an unsuccessful takeover we demonstrate that a raider may optimally acquire a small toehold even if the acquisition does not drive up the pre-tender target price. This occurs because although a larger toehold increases profits if the takeover succeeds it also conveys a higher level of managerial entrenchment and hence a lower firm value if the takeover fails. We derive new predictions regarding the optimal toehold and target value following a failed takeover. We also examine the impact of a rival bidder and dilution.