The purpose of this paper is to explore the correlation between the technological proximity measures in three areas: USA, Japan and Europe. In each economic area, we use information from two international patent systems to construct the technological proximity for 240 international firms. In...

The aim of this paper is to investigate the correlation between the technological proximity measure based on patent citations in three economic areas: USA, Japan and the Europe. In each economic area, we use information from two international patent systems to construct the technological...