As patent data become more available in machine-readable form, an increasing number of researchers have begun to use … the economic meaning of these citation-based patent measures using the financial market valuation of the firms that own … measures of Tobin's Q for the firms. We find that citation-weighted patent stocks are more highly correlated with market value …

We use textual analysis of high-dimensional data from patent documents to create new indicators of technological … innovation. We identify significant patents based on textual similarity of a given patent to previous and subsequent work: these … patents are distinct from previous work but are related to subsequent innovations. Our measure of patent significance is …

This paper looks more closely at the sources of patent growth in the United States since 1984. It confirms that the … surge), but not before, when patents were relatively unimportant in these industries. Also, the value of patent rights in …

. We identify research inputs based on a natural language analysis of 10 billion word and word sequence patent pairs in 6 …, we develop also a new measure of patent value. The measure distinguishes between citations that reflect the cumulative …

This paper assesses the validity and accuracy of firms' backward patent citations as a measure of knowledge flows from … associated with backward citations to both patent and nonpatent references. We find that patent citations reflect the codified …, as well as those used in firm basic research. We also find that firms' patenting and citing strategies affect patent …

The last two decades have witnessed a dramatic increase in the use of patent citation data in social science research …. Facilitated by digitization of the patent data and increasing computing power, a community of practice has grown up that has …. First, it takes stock of these main uses. Second, it discusses four pitfalls associated with patent citation data, related …

references in patent specifications. These references are common and algorithmically extractable. Critically, they are very … academic articles are in the patent text, and 31% of in-text citations are on the front page. We explain these differences by …

by a patent. The count of later patents that cite a patent as relevant prior art – so called forward citations – have …

entrepreneurs with business backgrounds, who are more likely to patent their intellectual capital. We also find that when …

This paper examines patterns of knowledge diffusion from US and Japan to Korea and Taiwan using patent citations as an … inventors tend to learn evenly from both US and Japanese inventors. The frequency of a Korean patent citing a Japanese patent is … almost twice that of the frequency of a Taiwanese patent citing a Japanese patent. We also find that a patent is much more …