Using 4 years of data from 36 American cities and 6 high technology groupings we present thc first estimates of University R&D spillover effects on ctnployrnent at this level of disag-gregation, while controlling for wages, prior innovations, state fixed efrccts, and saniple selectivity hias. We...

This paper explores the patterns of citations among patents taken out by inventors in the U.S., the U.K., Francc. Germany and Japan. We find (I) patents assigned to the same firm are more likely to cite each other, and come sooncr than other citations; (2) patents in the same patent class are...

The paper examines the evolution of technological specialisation in a group of selected countries over the period between 1890 and 1990. Technological specialisation of each country is measured by the RTA (Revealed Technological Advantage) index, based on patent statistics, in four different...

This paper basically adopts a 'technology gap' approach for explaining international export specialisation. Within this broad label there has been one tradition which has applied cumulativeness in technological change as an explanation, while another tradition has emphasised the role of...

This paper aims to add evidence on the role played by firms' technological competencies in the determination of their intensity of cooperation with other firms. Using a database composed by patents jointly filcd by two or more firms in the European Patent Office, the paper confronts the...