关键词: 绿色创新效率, 分异趋势, 驱动机制, StoNED, SPDM, 长江中游城市群

Abstract: The article constructs the StoNED model to measure the green innovation efficiency of the middle reaches of the Yangtze River from 2005 to 2019, the dynamic SPDM model is introduced to explore the driving mechanism of the spatial-temporal differentiation of green innovation efficiency from the perspective of convergence speed, and its purpose is to solve the problem that the traditional efficiency measurement model cannot take into account the multi-output and slack of input-output, and cannot reasonably quantify the differentiation of green innovation efficiency. The findings are as follows: (1)the green innovation efficiency of the urban agglomeration in the middle reaches of the Yangtze River has formed a multi-center spatial pattern dominated by Wuhan, Changsha, Nanchang, Yichang, Xiangyang, etc, and the absolute difference within the province is basically solidified and the relative difference in the efficiency of green innovation within the province has been greatly reduced, the degree of differentiation of green innovation efficiency between the east and west regions and the north and south regions shows a shrinking trend. (2)the difference in the differentiation trend of green innovation efficiency is manifested by the different convergence speeds, Jiangxi province has the fastest convergence speed, followed by Hunan province, and Hubei province is the slowest. This difference is mainly due to the level of economic development and the government, science and technology expenditure, environmental regulations, education level, industrial structure, financial support level and other factors and influencing mechanisms act together to drive. Finally, corresponding countermeasures and suggestions are put forward.

Key words: green innovation efficiency, differentiation trend, driving mechanism, StoNED, SPDM, urban agglomeration in the middle reaches of Yangtze River