We geocode a data set of patents and their citation counts, including citations from abroad. This allows us to examine both the quantity and quality of local inventions. We also refine our data on local academic R&D to explore effectsnfrom different fields of science and sources of R&D funding....

This paper reviews academic research on the connections between agglomeration and innovation. We first describe the conceptual distinctions between invention and innovation. We then discuss how these factors are frequently measured in the data and note some resulting empirical regularities....