Measurement of Digital Economy Development Level in Yangtze River Delta and Its Influence on Ecological Efficiency

Based on the panel data of 41 cities in the Yangtze River Delta from 2007 to 2018, this paper empirically tests the impact of digital economy development on urban ecological efficiency in the Yangtze River Delta. The results show that the development level of digital economy in Yangtze River Delta urban agglomeration is fluctuating and rising; the development of digital economy has a significant positive role in promoting the improvement of urban ecological efficiency; there is significant regional heterogeneity in the promotion of ecological efficiency by digital economy, especially in central cities.