This study utilizes neural network to explore the nonlinear relationships between corporate performance and the patent traits
measured from Herfindahl-Hirschman Index of patents (HHI of patents), patent citations, and relative patent position in the
most important technological field (RPPMIT) in the US pharmaceutical industry. The results show that HHI of patents and RPPMIT have nonlinearly and monotonically positive influences upon corporate performance, while the influence of patent citations
is nonlinearly U-shaped. Therefore, pharmaceutical companies should raise the degrees of the leading position in their most
important technological fields and the centralization of their technological capabilities to enhance corporate performance.
Authors:Ming-Chao Huang, Shih-Chieh Fang, and Shao-Chi Chang
. Further, we measure the HHIofpatent sources to demonstrate the distribution of patentees.
Before counting in-house patents and number of patentees identically, we must first define the boundary of the applicants. Based on the concept of