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

innovation. Nevertheless, an aspect has been overlooked: the patentdistribution across inventors is extremely skewed, as many … empirical literature has not discussed the different kinds of local innovation fromwhich patents may originate. A first … from differentscales of innovation are located in different cities. A third contribution - which constitutes themain scope …

use both academic publications and patent data to trace the geographical distribution of related knowledge and innovation …