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We study the effects of changes in the ownership or productive assets in a concentrated industry. Using a Cournot model, we analyze (1) investment by an oligopolist, (2) the sale of capital goods by one oligopolist to another, and (3) stock market purchases, whereby one firm acquires a partial...

We study the optimal pattern of outlays for a single firm pursuing an R&D program over time. In the deterministic case (a) the amount of progress required to complete the project is known and (b) the relationship between outlays and progress is known. In this case it is optimal to increase...

In providing rewards to innovators, there is a tradeoff between patent length and breadth. This article provides conditions under which the optimal patent policy involves infinitely-lived patents, with patent breadth adjusting to provide the required reward for innovation.

Patents, patent litigation, and patent settlements increasingly influence competition. Settlements of patent disputes come in many forms, including licensing and cross-licensing agreements, patent pools, mergers, and joint ventures. While frequently procompetitive, such settlements can stifle...

Three years ago, the Antitrust Division and the Federal Trade Commission revised their Horizontal Merger Guidelines to articulate in greater detail how they would treat claims of efficiencies associated with horizontal mergers: claims that are frequently made, as for instance in the recently...