We propose a new patent-based measure of knowledge spillovers that calculates technological proximity based on firms … that were identified via patent backward citations links. We argue that this measure has a couple of advantages as compared … 'relevant' firms. Our empirical results indeed show that the measure performs better than the standard measure in an innovation …

This paper reports the results of an analysis of patent citation and patent renewal data, advancing a loglinear … relation between patent citations and patent value. A complementary analysis of firms' patent portfolios confirms that …