Software platforms are the invisible engines that have created, touched, or transformed nearly every major industry for the past quarter century. They power everything from mobile phones and automobile navigation systems to search engines and web portals. They have been the source of enormous...

This paper analyzes a model of oligopolistic competition with ongoing investment. It incorporates the following models as special cases: incremental investment, patent races, learning-by-doing, and network externalities. We investigate circumstances under which a firm with low costs or high...

The new economy hypothesis identifies the southern and western parts of the United States as important source points for industrial creativity that can rival the northeast. This study shows that this viewpoint, based on patent activity, is warranted. Regional technology production in the country...