Based on super-efficiency BCC model, measure the innovation efficiency of each city and the overall innovation efficiency within China's three eastern urban agglomerations from 2010 to 2018, investigate the innovation efficiency gap within urban agglomerations by using the coefficient of variation, so as to explore the relationship between the internal gap and the overall innovation efficiency of urban agglomerations, and use the panel Tobit model to analyze the specific factors affecting the innovation efficiency.The results showed that the innovation efficiency of the three urban agglomerations has been generally improved; the innovation efficiency of innovation core cities in the Yangtze River Delta urban agglomeration is relatively insufficient, the number and efficiency of innovation node cities in the Beijing-Tianjin-Hebei urban agglomeration are both insufficient, and the innovation investment in the innovation hinterland of the three urban agglomerations is insufficient;the innovation efficiency gap of the three urban agglomerations goes through a changing process from expanding to narrowing, the innovation efficiency of urban agglomerations is affected by the innovation efficiency gap among cities within urban agglomerations, the innovation efficiency gap among cities in urban agglomerations should be kept moderate, which is not conducive to the improvement of the overall innovation efficiency of urban agglomerations if the gap is too large or too small; the factors affecting the innovation efficiency of the three urban agglomerations had regional differences.
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