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Patent portfolio analysis can be a useful approach to understand technological capabilities. However, little attention has been given to elaborate the mechanism of patent portfolio to firm performance. This paper does an empirical study about how patent portfolio size, patent portfolio diversity and technical scope contribute to firm performance based on panel data of 99 Chinese companies from 2013 to 2017. We incorporate technological opportunity as moderator. Our result indicates that patent portfolio with larger size and broader technical scope can have a positive effect on firm performance, but a more diverse patent portfolio can have a negative effect on firm performance. Technological opportunity has a positive effect on the relationship between technical scope and firm performance; however technological opportunity has a negative effect on the relationship between patent portfolio size, patent portfolio diversity and firm

Using Patent Portfolio to Effectively Manage Technical Assets: The Mechanism of Patent Portfolio to Influence Firm Performance