other citations; (2) patents in the same patent class are approximately 100 times as likely to cite each other as patents … from different patent classes there is not a strong time pattern to this effect; (3) patents whose inventors reside in the …

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 …

segmentation) shaped the underlying incen- tives for innovation in the PC industry during the mid to late 1980s. …

detailed data on inventors contained in patents, and harness it for economic research. Patent data has long been used in … "John Smith" problem). Given that there are over 2 million patents with 2 inventors per patent on average, the "who is who …-inventors, etc. Forty percent of them have more than one patent, and 70,000 have more than 10 patents. We can trace those multiple …

This paper asks the question: Can we see evidence of General Purpose Technologies in patent data? Using data on three … measures of GPTs, including generality, number of citations, and patent class growth, for patents themselves and for the …