Lanjouw, Jean O.; Schankerman, Mark A. - 2021
latent variable common to a set of four indicators: the number of patent claims, forward citations, backward citations and … important. Our measure of quality is significantly related to subsequent decisions to renew a patent and to litigate … infringements. Using patent and R&D data for 100 U.S. manufacturing firms, we find that adjusting for quality removes much of the …