Based on the perspective of"new infrastruc-ture",this paper analyzes the influence mechanism of knowledge flow on urban green innovation efficiency by using the super-ef-ficiency SBM model and panel fixed effect model.The results show that knowledge flow has a significant positive impact on the efficiency of urban green innovation,and in this process,"new infrastructure"plays a significant positive moderating role,which is as follows:Information infrastructure and integration in-frastructure play a significant positive moderating role in the process of knowledge flow affecting urban green innovation effi-ciency,while innovation infrastructure shows no significant role.The positive impact of knowledge flow on urban green innovation efficiency is more significant in cities with superior geographical location,larger population and higher economic development level.The moderating effect of"new infrastructure"on the in-fluence of knowledge flow on the efficiency of urban green inno-vation also presents heterogeneity due to the difference of urban characteristics.
new infrastructureknowledge floweffi-ciency of urban green innovationheterogeneity
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