This article presents the consumer surplus formula for constant elasticity of substitution (CES) demands. The formula is used to compare the monopoly and optimum provisions of product variety. It is shown that a monopolist under-provides variety. This result is contrasted with Lambertini�s analysis of the monopolist�s optimal R&D portfolio. I also contrast my approach with the indire…

The events and aftermath of September 11, 2001, profoundly changed the course of history of the nation. They also brought the phenomenon known as terrorism to the forefront of the nation?s consciousness. As it became thus focused, the limits of scientific understanding of terrorism and the capacity to develop policies to deal with it became even more evident. The objective of this report is to …