ABSTRACT
With the tightening of resource constraints and the proposal of the Chinese High-quality Development strategy, innovation-driven has emerged as a new option to balance economic progress with environmental protection. The paper takes Chinese inter-provincial panel data from 2007 to 2017 as a research sample and is based on a spatial Durbin model, investigating the association among green technology innovation (GTI), "green technology-institution" collaborative innovation, and ecological efficiency (EE), while fiscal decentralization is discussed as a moderating factor. According to the results, "green technology-institution" collaborative innovation is positively promoting ecological efficiency and causing spatial spillovers if the economic distance is taken into account. Compared with the single role of green technology innovation, collaborative innovation has a greater role in improving ecological efficiency. Among them, to improve ecological efficiency, it is best to develop green technology innovation and encourage production institutions in a coordinated manner. According to the moderating effect, fiscal decentralization moderates the impact of innovation collaboration on ecological efficiency in a negative way. Therefore, balancing the decentralization of local fiscal expenditures is important to promoting China's ecological efficiency. In addition, China should purposefully promote the degree of synergy between green technology innovation and related institutions for enhancing eco-efficiency.
