【摘要】 在数字经济发展与构建全国统一大市场的战略背景下，政府数字化转型如何有效遏制市场中的地方保护主义，是当下中国式现代化治理体系建设面临的重要课题。然而，数字政府治理对地方保护行为的影响与机制尚未得到充分解释。为此，研究基于2015—2023年中国政府采购合同数据，以数字政府治理政策的实施为准自然实验，在PSM-DID框架下利用固定效应面板数据模型开展实证检验。研究发现，数字政府治理能够显著遏制政府采购中的地方保护行为，且该结论在通过平行趋势检验与安慰剂检验后依然稳健。机制检验进一步揭示，其作用主要通过降低信息不对称和推动市场一体化来实现。异质性分析还表明，该抑制效应在人口更密集、开放度更高以及空间结构更集中的城市中更为突出。研究为全国统一大市场构建以及“有为政府”+“有效市场”的中国式现代化治理体系建设提供了理论支撑和实证依据。更多还原

【Abstract】 Against the strategic background of digital economic development and the construction of a unified national market,howgovernment digital transformation can effectively curb local protectionism within the market represents a critical challenge forbuilding China’s modern governance system.However,the impact and mechanisms of digital government governance on local protectionist behaviors have yet to be fully elucidated.To address this gap,this study employs a natural experiment based on the implementation of digital government governance policies,utilizing China’s government procurement contract data from 2015 to 2023.Within a PSM-DID framework,an fixed-effects panel data model is applied for empirical testing.Findings reveal that digital government governance significantly curbs local protectionist behavior in government procurement,with this conclusion remaining robust after parallel trend and placebo tests.Mechanism analysis further reveals that this effect primarily operates by reducing information asymmetry and promoting market integration.Heterogeneity analysis also indicates that the suppression effect is more pronounced in cities with higher population density,greater openness,and more concentrated spatial structures.This research provides theoretical support and empirical evidence for building a unified national market and establishing a Chinese modernization governance system characterized by “an active government” and “an effective market”.更多还原