Geopolitical risks and port-related carbon emissions: Evidence and policy implications

IF 6.3 2区 工程技术 Q1 ECONOMICS
Chengkun Li , Pierre Cariou , Dong Yang
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引用次数: 0

Abstract

Geopolitical risks (GPR) have emerged as a critical source of disruption in global trade and transportation systems, yet their environmental consequences on port-related emissions remain underexplored. This study examines the impact of geopolitical tensions on port-level carbon emissions using a monthly panel dataset covering 269 container ports across 40 countries and regions from 2016 to 2023. Employing a system generalized method of moments (SYS-GMM) estimator, we find that heightened geopolitical risks significantly increase carbon emissions at ports. A key mechanism underlying this relationship is that geopolitical tensions disrupt the vessel arrival schedules, which reduces port efficiency, and consequently increases emissions from ships at berth. Further heterogeneity analyses reveal that the environmental impact of GPR is more pronounced at ports serving larger container vessels, as these ports are typically involved in long-haul routes that are more exposed to geopolitical disruptions. In contrast, the impact is less significant at ports with fewer calling carriers, likely because dominant shipping lines tend to internalize the costs of inefficient berthing by smoothing vessel arrival times. This study provides novel empirical evidence on the environmental consequences of geopolitical shocks in the maritime sector, offering actionable policy insights for risk-sensitive and sustainable port governance.
地缘政治风险和港口相关碳排放:证据和政策影响
地缘政治风险(GPR)已成为全球贸易和运输系统中断的一个重要来源,但其对港口相关排放的环境影响仍未得到充分探讨。本研究使用涵盖2016年至2023年40个国家和地区269个集装箱港口的月度面板数据集,考察了地缘政治紧张局势对港口碳排放的影响。利用系统广义矩量法(SYS-GMM)估计,我们发现地缘政治风险的增加显著增加了港口的碳排放。这种关系背后的一个关键机制是,地缘政治紧张局势扰乱了船舶到达时间表,从而降低了港口效率,从而增加了停泊船舶的排放。进一步的异质性分析表明,在服务大型集装箱船的港口,探地雷达的环境影响更为明显,因为这些港口通常涉及长途航线,更容易受到地缘政治干扰。相比之下,在停靠承运人较少的港口,这种影响就不那么显著了,这可能是因为占主导地位的航运公司倾向于通过缩短船舶到达时间来将低效靠泊的成本内部化。本研究为海事部门地缘政治冲击的环境后果提供了新的经验证据,为风险敏感和可持续的港口治理提供了可操作的政策见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Transport Policy
Transport Policy Multiple-
CiteScore
12.10
自引率
10.30%
发文量
282
期刊介绍: Transport Policy is an international journal aimed at bridging the gap between theory and practice in transport. Its subject areas reflect the concerns of policymakers in government, industry, voluntary organisations and the public at large, providing independent, original and rigorous analysis to understand how policy decisions have been taken, monitor their effects, and suggest how they may be improved. The journal treats the transport sector comprehensively, and in the context of other sectors including energy, housing, industry and planning. All modes are covered: land, sea and air; road and rail; public and private; motorised and non-motorised; passenger and freight.
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