关键词: 产业集聚, 绿色经济效率, 双边随机前沿模型, 门槛模型

Abstract: This paper improves the bilateral stochastic frontier model by including spatial effects to estimate the bilateral impact of manufacturing agglomeration on green economic efficiency. Based on the panel data of prefecturelevel and above cities in China from 2006 to 2016, the agglomeration effect, congestion effect and the combined net effect of manufacturing agglomeration on green economic efficiency are estimated. The research results show that: (1) The agglomeration effect of China's manufacturing agglomeration on green economy efficiency is 19.51%, the congestion effect is 8.96%, and the net effect is 10.55%, that is, manufacturing agglomeration is conducive to the improvement of green economy efficiency. (2) The panel threshold model analysis finds that in the highlevel stage, with the increase in manufacturing agglomeration and specialization, the marginal effect of the net effect on green economy efficiency changes in a Ushape, and as the spatial level of manufacturing agglomeration increases, the marginal effect of the net effect on green economy efficiency shows an increasing trend. (3) The analysis of heterogeneous combination shows that, in different stages of economic development, changes in manufacturing agglomeration specialization levels and spatial hierarchies have an increasing effect on the bilateral green economy efficiency of different sample cities. The impacts are not the same, indicating that cities in China have sizable heterogeneity and challenges in choosing the route of manufacturing agglomeration.

Key words: industrial agglomeration, green economy efficiency, bilateral stochastic frontier model, threshold model