Mapping the structural evolution of intercity patent transfer constrained by space: a case study of China

The patent transfer (PT) has been an essential means of technological catch-up and control for countries and regions. The development and diffusion of PT is influenced by space and network. Analyzing China’s patent transfer network (PTN) from 2001 to 2020 through spatial and complex network analysis, we found that the PTN became denser with significant Matthew effect, hierarchical and small-world properties. Beijing, Shanghai, and Shenzhen remained as national hubs, while new hubs like Suzhou, Guangzhou, Foshan, and Hangzhou, acting as intermediates, emerged. Network communities become more homogenised and geographically clustered due to the resonance effect. There was a shift from disperse hubs to spatial agglomerations, with the construction of long-distance shortcuts breaking spatial constraints on intercity patent transfer.