数字产业集群政策对城市绿色发展的影响OA

As a crucial strategic tool for China's digital economy,the impact of the digital industry cluster policy on urban green develop-ment and its underlying mechanisms remains underexplored.This study used green total factor productivity(GTFP)calculated by the SBM-GML model as the indicator for measuring urban green development levels,treated the national digital industry cluster policy as a quasi-natural experiment,and employed a multi-period difference-in-differences(DID)method to systematically evaluate the policy's impact on urban green development and its underlying mechanisms based on panel data from 284 prefecture-level and above cities in China from 2007 to 2023.The findings were as follows:① The digital industry cluster policy significantly enhanced urban green development.Base-line regression showed that the policy could increase urban GTFP by 0.042 units on average.This result remained valid after conducting a series of robustness tests.② Heterogeneity analysis showed that the policy's promotional effects were more pronounced in non-resource-based cities,non-old industrial base cities,and cities with higher levels of digital economy development,while they remained statistically insignificant in resource-based cities,old industrial base cities,and cities with lower levels of digital economy development.③ Mechanism tests indicated that the policy fostered urban green development primarily through green technology innovation,digital enterprise and tal-ent agglomeration,and industrial structure rationalization.This study offers the following insights for policy optimization:First,strengthen the strategic positioning of the digital industry cluster and gradually expand the scope of policy implementation based on pilot experiences to form a new pattern of cluster development at the national level.Second,implement differentiated support strategies and formulate target-ed policies for cities with varying resource endowments,industrial foundations,and digital economy development conditions to enhance re-source allocation efficiency.Finally,focus on key mechanisms such as green technology innovation,digital factor agglomeration,and indus-trial structure rationalization,and strengthen policy support for promoting technology transformation,talent environment optimization,and industrial synergy.