A simple model demonstrates that there is no theoretical connection between the extent of price discrimination and the extent of market power.

The antitrust laws are intended to permit procompetitive actions by firms and deter anticompetitive actions. We consider firms' incentives to use the antitrust lawsuits for strategic purposes, in particular to prevent procompetitive efficiency-improvement by rival firms. Our main result is that,...

We compare private and public enforcement of the antitrust laws in a simple strategic model of antitrust crime and lawsuit. The model highlights the tradeoff that private firms are ex ante more likely than the government to be informed about actual antitrust violations, but are also more likely...