Griffith, Rachel; Lee, Sokbae; Van Reenen, John - 2011
boundaries than within them) as measured by the speed of patent citations. We present econometric evidence that the geographical … on over two million patent citations between 1975 and 1999. Home bias is exaggerated in models that do not control for … sectors where agglomeration externalities may remain strong. -- Fixed effects ; home bias ; patent citations ; knowledge …