We analyze 7.7 million patents via textual analysis to develop a novel patent-to-patent measure of innovation similarity among firms. With this measure, we investigate whether stock price movements reveal information about firms' technological connectedness. We find that investors impound...

We examine the causal effects of uncertainty on corporate innovation by exploiting terrorism events. During the five-year window after terrorist attacks, firms near the strikes experience meaningful declines in R&D spending, patenting, citations, patent originality, and innovation value. These...

We examine how firms react to their competitors' highly publicized technology breakthroughs measured by the renowned R&D 100 Award. These awards have been granted to top 100 technological inventions every year since 1965 and have come to be known as the “Oscar of Invention” (e.g., Verhoeven,...