linked fields. Our analysis uses 1.8 million U.S. patents and their citation properties to map the innovation network and its … strength. Past innovation network structures are calculated using citation patterns across technology classes during 1975 …-1994. The interaction of this pre-existing network structure with patent growth in upstream technology fields has strong …

Is there any evidence that innovation and technological progress are contained by competition and fostered by monopoly … that this is not the case.On the contrary, using both patent statistics and productivity growth as alternative measures of … innovation and technical change, we observe faster technological advances in more competitive markets. These results are robust …

This paper surveys the major changes in patent policy and practice that have occurred in the last two decades in the U … effects of changes in patent policy. Despite the significance of the policy changes and the wide availability of detailed data … relating to patenting, robust conclusions regarding the empirical consequences for technological innovation of changes in …

between imitation and innovation. Using US patent data for the period 1977-2005, we find that there are inverted U …-shaped relationships between the degree of industry-level technological imitation and industry-level innovation activities and between the … degree of industry-level technological imitation and the value of firm-level innovation. Our results suggest that positive …

estimation is over panel datasets of patent grants, and unpatented innovations that were submitted for prizes at the annual … hypothesize that the difference partly owes to the design of patent institutions, which explicitly incorporate mechanisms for …

patent-based innovations are from existing portfolios. Our results indicate that there are distinct life-cycle patterns to …

received over their careers, we highlight the impact of early U.S. patent institutions in providing broad access to economic … procedures for application, the United States deliberately created a patent system that allowed a much wider range, in … patent institutions. Moreover, by requiring that applications be examined for novelty by technical experts, and by enforcing …

While many studies have looked at innovation and adoption of technologies separately, the two processes are linked … combines plant-level data on U.S. coal-fired electric power plants with patent data pertaining to NOx pollution control …