【摘要】 空铁联运作为一种全新高效的交通运输方式，对数字经济高速发展的潜在影响亟待深入探讨。本文将城市间空铁联运的开通视为一项准自然试验，基于2011—2023年长三角地区41个地级及以上城市的面板数据，通过构建双重差分模型，系统评估城市间空铁联运对数字经济发展的作用效果与机制路径。研究发现，城市间空铁联运的开通能够显著促进地区数字经济发展，并且该结论在经过一系列稳健性检验后依然成立。机制检验发现，实体经济发展、劳动力流动是空铁联运影响数字经济发展的重要机制；异质性分析发现，空铁联运的开通对非省会城市、人均GDP不足10万元的城市的影响更为显著。为此，应完善空铁联运的全方位交通网络，兼顾长三角地区均衡发展，筑牢数字经济“实体”基础，强化劳动力流动的积极效应，全面赋能数字经济发展。更多还原

【Abstract】 As a new and efficient mode of transportation,the potential impact of air-rail intermodality on the rapid development of the digital economy urgently needs to be further explored.Treating the opening of inter-city air-rail intermodality(ARI)as a quasi-natural experiment,this study constructs a Differencein-Differences(DID)model based on panel data from 41 cities at prefecture level and above in the long triangle city group from 2011 to 2023,so as to examine the effect and mechanism path of the opening of intercity ARI on the development of the digital economy.Research has found that the establishment of intercity ARI can significantly promote regional digital economic development,and this conclusion remains valid after a series of robustness tests.Mechanism testing found that the development of the real economy and labor mobility are important mechanisms for the impact of ARI on the development of the digital economy;heterogeneity analysis found that the opening of ARI has a more significant impact on non-provincial capital cities and cities with a per capita GDP of less than 100,000 yuan.Therefore,it is necessary to improve the comprehensive ARI network,balance regional development,consolidate the “real economy” foundation of the digital economy,strengthen the positive effects of labor mobility,and fully empower the growth of the digital economy.更多还原