Hall, Bronwyn H.; Trajtenberg, Manuel - 2021
million US patents granted between 1967 and 1999, and their citations received between 1975 and 2002, we construct a number of … measures of GPTs, including generality, number of citations, and patent class growth, for patents themselves and for the … patents that cite the patents. A selection of the top twenty patents in the tails of the distribution of several of these …