Hall, Bronwyn H.; Jaffee, Adam; Trajtenberg, Manuel - Institute of Business and Economic Research (IBER), … - 2000
As patent data become more available in machine-readable form, an increasing number of researchers have begun to use … measures based on patents and their citations as indicators of technological output and information flow. This paper explores … the economic meaning of these citation-based patent measures using the financial market valuation of the firms that own …