Over the past forty years, there has been a remarkable transformation in horizontal merger enforcement in the United States. With no change in the underlying statute, the Clayton Act, there has been a dramatic decline in the weight given to market concentration by the federal courts and by the...

This article aims to help regulators and commentators incorporate both Chicago School and post-Chicago School arguments in assessing whether regulation should mandate open access to information platforms. The authors outline three alternative models that the FCC could adopt to guide its...

Merger simulation is growing in importance as a tool to evaluate the unilateral competitive effects of mergers. This paper offers a relatively non-technical description of the principles of merger simulation. In addition, it introduces PCAIDS, a new and highly flexible "calibrated-demand" merger...

Antitrust policy for the pooling of patents and other intellectual property rights has undergone a dramatic transformation since the first cases were decided at the beginning of the twentieth century. This transformation generally reflects developments in economics that provide a better...

There has been considerable debate concerning whether consumer surplus or total surplus should be the welfare standard for antitrust. This debate misses two critical issues. First, antitrust is not straightforwardly welfarist—it does not maximize but protects, and it does not forbid all...