Accelerating the development of e-government and optimizing government services are new tools to promote government innovation. Based on the quasi-natural experiment that county-level government affairs disclosure and government service pilot, this paper constructs a spatial double-difference model (SDID) to investigate the direct effect and spillover effect of e-government on the efficiency of "local-neighbor" government governance. Furthermore, this paper explains the internal mechanism from the dual dimensions of control, accountability and service improvement. The results show that the e-government can significantly improve the efficiency of "local-neighbor" government governance. The effect of e-government on governance efficiency has typical heterogeneity in the dimension of institutional environment, administrative hierarchy and geographical division. Government affairs disclosure, interactive response and online services are the key paths for e-government to improve the efficiency of ocal governance. The peer effect of inter-regional e-government development is an important spillover mechanism for the simultaneous improvement of the governance efficiency of neighboring governments. The research conclusions of this paper are helpful to deeply understand the influence mechanism of e-government on my country's government governance efficiency, and provide policy suggestions for the improvement of governance efficiency.

加快发展电子政务,持续优化政务服务是助力政府治理创新的新工具。基于 “县级政府政务公开和政务服务试点”这一 “准自然实验”,本文构建空间双重差分模型 (SDID)实证考察电子政务对政府治理效率的提升效应及其在空间维度的溢出效应,并就控权问责和服务提升双重维度阐释电子政务影响政府治理效率的内在机理。研究结果表明:电子政务能够显著提升本地政府治理效率,同时对于邻地政府治理效率亦存在显著的正向空间溢出效应;电子政务对于政府治理效率的影响在制度环境维度、行政等级维度以及地理区划维度存在典型的异质特征;政务公开、互动回应和在线服务是电子政务改善本地政府治理效率的关键路径,邻地间的同侪效应则是邻地政府治理效率同步提升的重要溢出机制。本文的研究结论有助于深入理解电子政务对我国政府治理效率的影响机理,并为实现政府治理效率的提升提供政策建议。