{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,28]],"date-time":"2026-05-28T01:38:34Z","timestamp":1779932314691,"version":"3.53.1"},"reference-count":65,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2025,9,1]],"date-time":"2025-09-01T00:00:00Z","timestamp":1756684800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the National Natural Science Foundation of China","award":["52172311"],"award-info":[{"award-number":["52172311"]}]},{"name":"the National Natural Science Foundation of China","award":["2024JBZX042"],"award-info":[{"award-number":["2024JBZX042"]}]},{"name":"the National Natural Science Foundation of China","award":["2024QN001"],"award-info":[{"award-number":["2024QN001"]}]},{"name":"the Fundamental Research Funds for the Central Universities","award":["52172311"],"award-info":[{"award-number":["52172311"]}]},{"name":"the Fundamental Research Funds for the Central Universities","award":["2024JBZX042"],"award-info":[{"award-number":["2024JBZX042"]}]},{"name":"the Fundamental Research Funds for the Central Universities","award":["2024QN001"],"award-info":[{"award-number":["2024QN001"]}]},{"name":"Major Humanities and Social Sciences Research Projects in Zhejiang Higher Education Institutions","award":["52172311"],"award-info":[{"award-number":["52172311"]}]},{"name":"Major Humanities and Social Sciences Research Projects in Zhejiang Higher Education Institutions","award":["2024JBZX042"],"award-info":[{"award-number":["2024JBZX042"]}]},{"name":"Major Humanities and Social Sciences Research Projects in Zhejiang Higher Education Institutions","award":["2024QN001"],"award-info":[{"award-number":["2024QN001"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Systems"],"abstract":"<jats:p>Sea\u2013rail intermodal transport offers high efficiency and environmental benefits, yet its development in China remains limited. Existing studies have mainly assessed the macro-level benefits of sea\u2013rail intermodal transport policies, but rigorous evidence on whether incentive policies work and how their effects differ across policy types remains scarce, which limits evidence-based policy design and efficient allocation between subsidies and capacity expansion. To address this gap, a dual-policy identification framework was established that combines a multi-period difference-in-differences model with event study analysis and used station\u2013month data from China to assess the independent effects, underlying mechanisms, and spatiotemporal heterogeneity of railway freight price subsidies and freight train expansion on container throughput. The results indicate that both policies significantly increased container throughput. Railway freight price subsidies exhibited stronger and more persistent effects with a certain lag, whereas freight train expansion produced rapid but short-lived responses. The impacts of both policies were more pronounced in short-distance transport, but weakened or even turned negative over longer distances. Moreover, the number of participating entities served as a key mediating pathway, while information sharing positively moderates policy impacts. This study makes theoretical contributions to the identification of heterogeneity, mechanism analysis, and spatiotemporal characterization of SRIT incentive policy effects, while offering refined and actionable guidance for SRIT policy optimization.<\/jats:p>","DOI":"10.3390\/systems13090764","type":"journal-article","created":{"date-parts":[[2025,9,2]],"date-time":"2025-09-02T14:16:55Z","timestamp":1756822615000},"page":"764","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Unpacking the Effects of Heterogeneous Incentive Policies on Sea\u2013Rail Intermodal Transport: Evidence from China"],"prefix":"10.3390","volume":"13","author":[{"given":"Weiguang","family":"Ma","sequence":"first","affiliation":[{"name":"Department of Information Management, School of Economics and Management, Beijing Jiaotong University, Beijing 100044, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lei","family":"Huang","sequence":"additional","affiliation":[{"name":"Department of Information Management, School of Economics and Management, Beijing Jiaotong University, Beijing 100044, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8594-5641","authenticated-orcid":false,"given":"Rongjia","family":"Song","sequence":"additional","affiliation":[{"name":"Experimental Center of Data Science and Intelligent Decision Making, Department of Information Management, School of Management, Hangzhou Dianzi University, Hangzhou 310018, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiong","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Information Management, School of Economics and Management, Beijing Jiaotong University, Beijing 100044, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ying","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Information Management, School of Economics and Management, Beijing Jiaotong University, Beijing 100044, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qianyao","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Information Management, School of Economics and Management, Beijing Jiaotong University, Beijing 100044, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,9,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"207","DOI":"10.1016\/j.tranpol.2024.05.026","article-title":"Sustainable Pathways for Mitigating Externalities in Long-Distance Terrestrial Transport","volume":"154","author":"Cavallaro","year":"2024","journal-title":"Transp. 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