Urban eco-efficiency, as an indicator to evaluate urban sustainability, has attracted increased attention, and green technology innovation has been proved to be an effective method to promote eco-efficiency. However, due to regional inequality, the level of eco-efficiency and green technology...

This study considers spatial and nonlinear perspectives to examine the heterogeneous role of green technology innovation in the economic development and air quality of Chinese cities. We find that green inventive technology innovation benefits economic development and air quality improvement,...

We examine the impact of an optimal emissions tax on research and development of emission reducing green technology (E-R&D) in the presence of R&D spillovers. We show that the size and effectiveness of the optimal emissions tax depends on the type of the R&D spillover: input or output spillover....