LU Yanjin, NI Qingshan, WU Di - Economic geography, 2024 - jjdl.com.cn
Based on the data of urban R&D expenditure, urban patent and urban statistical yearbook, and using the methods of perpetual inventory and fixed effect model, this paper measures …
T Liu, Z Su, Y Luo, L Yin, Y Mou, C Sichuan - 2020 - pdf.hanspub.org
In order to explore the regional innovation efficiency of collaborated five major economic zones in Sichuan Province, as well as the inner gaps in development, this paper collected …