‘ethnicity-innovation’ channels exist elsewhere? This paper investigates, using a new panel of UK patents microdata. In theory …Ethnic inventors play important roles in US innovation systems, especially in high-tech regions like Silicon Valley. Do …, ethnicity might affect positively innovation via ‘star’ migrants, network externalities from co-ethnic groups, or production …

This paper investigates the effect of the threat and occurrence of patent litigation on the private value of patent … protection. Potential challenges are introduced into a renewal model as a factor in patentee decisions as to whether a patent is … worth maintaining. The model yields testable predictions about renewal probabilities. Data for post WWII German patents …

cumulative innovation. This paper studies the effects of strategic patenting on R&D, patenting and market value in the computer … software industry. We focus on two key aspects: patent portfolio size which affects bargaining power in patent disputes, and … the fragmentation of patent rights (.patent thickets.) which increases the transaction costs of enforcement. We develop a …

panels of UK and US firms matched to patent data we show that UK firms who had established a high proportion of US …

particular countries to file for non-resident patents in specific foreign economies. Our major contribution is to show that, in … file for patent protection in focal foreign economies where their regional peers and, to a lesser extent, competitors from … economies with similar export product structures have filed for a larger number of patents. …

technological exhaustion. We first develop an index of patent ‘quality’ using detailed information on patents in the U.S. in seven …We analyse the determinants of the decline in measured research productivity (the patent/R&D ratio) using panel data on … manufacturing firms in the U.S. for the period 1980-93. We focus on three factors: the level of demand, the quality of patents, and …