Over the last fifteen years, patent citations to scientific articles have increased rapidly. Is this indicative of increasingly powerful knowledge spillovers from academic science to industrial innovation? This paper seeks to shed light on that question by conducting statistical analysis of the...

This paper reviews the recent empirical literature on international knowledge spillovers. I start by summarizing the theoretical models that have highlighted the potential importance of these spillovers. Then, drawing upon the older micro productivity research tradition, I lay out a simple...