Research on the Efficiency of Green Innovation in Cities in the Yellow River Basin

This paper constructs an evaluation system of urban green innovation efficiency, and based on SBM-Undesirable model, calculates the green innovation efficiency of 56 cities in the Yellow River basin from 2013 to 2017, with a view to evaluating the green innovation efficiency of cities in the Yellow River basin. The study finds that, between 2013 and 2017, the overall green innovation efficiency of cities in the Yellow River basin is at a low level, with a mean value of only 0.535. The inner differences of green innovation efficiency between cities in the Yellow River basin are large. At the same time, cities in the lower reaches of the Yellow River basin have the highest average green innovation efficiency, followed by cities in the upper reaches. Cities in the middle reaches of the Yellow River basin are relatively low, so there is still much room for improvement.