International R&D spillovers: a survey

Abstract

This paper presents a critical survey on macro and micro levels studies that evaluate the impact of foreign R&D on domestic productivity growth in industrialized countries. Although the available studies converge towards the conclusion that significant international spillovers take place, we identify several issues that underline the need for further research. These issues are related to the structural models that are estimated, to the weighting scheme that is used 10 compute a foreign stock of R&D, and to the knowledge transmission mechanisms that are considered. It also clearly appears that there is a lack of analysis at the micro level.

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