Knowledge, once generated, spills only imperfectly among firms and nations. We posit that
since institutions and labor networks vary by region, there should be regional variations in …

This article illustrates the contribution of mobile inventors and networks of inventors to the
diffusion of knowledge across firms and within cities or states. It is based upon an original …

This paper examines whether interpersonal networks help explain two widely documented
patterns of knowledge diffusion:(1) geographic localization of knowledge flows, and (2) …

This paper studies geographic localization of academic and industrial knowledge spillovers.
Using data on US research and development laboratories that quantify spatial aspects of …

The purpose of this paper is to investigate the pattern of knowledge flows as indicated by the
patent citations in three areas: USA, Japan and Europe. In each economic area, we use …

The paper explores the role of inventors' mobility and social networks in generating
localized knowledge flows. Using a sample of Italian inventors, we replicate Jaffe's …

Adam B. Jaffe, Manuel Trajtenberg, and Rebecca Henderson (1993) developed a matching
method to study the geography of knowledge spillovers using patent citations, and found …

We develop a new distance-based test of localized knowledge spillovers that embeds the
concept of control patents. Using microgeographic data, we identify localization distance for …

We compare the geographic location of patent citations with that of the cited patents, as
evidence of the extent to which knowledge spillovers are geographically localized. We find …

Geographic localization of knowledge spillovers is a central tenet in multiple streams of
research. However, prior work has typically examined this phenomenon considering only …