Does the Development of the Digital Economy Promote Common Prosperity?—Analysis Based on 284 Cities in China

Common prosperity is the essential requirement of socialism and an important feature Chinese-style modernization. Data from 284 cities in China 2011 to 2020 were collected construct evaluation system digital economy common establish relevant econometric models explore their impact, spatial spillover, mechanism. It found that: (1) has obvious role promoting prosperity, this promotion dynamic nonlinear, economy’s more low-level regions; (2) externalities, there a spillover effect process prosperity; (3) resource allocation efficiency plays mediating development economy. Finally, countermeasures suggestions are proposed four aspects: strengthening economy, increasing investment infrastructure, enhancing governance capacity government, building demonstration zone. The research results deepen understanding provide some insights for ultimate realization prosperity.