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Climate Variability and International Trade

Authors: Dunbar, Geoffrey; Steingress, Walter; Tomlin, Ben;

Climate Variability and International Trade

Abstract

Cette étude quantifie l’incidence des ouragans sur le commerce maritime international vers les États-Unis. En mettant en correspondance des données géocodées sur les ouragans et des données de suivi par satellite de navires commerciaux, nous repérons les intersections entre la trajectoire des ouragans et les routes maritimes commerciales qui relient les ports américains et étrangers. En comparant le moment où les ouragans croisent ces routes avec des données mensuelles sur le commerce des ports américains, nous isolons les effets imprévus d’un ouragan frappant une route commerciale à l’aide de deux méthodes d’identification distinctes : une étude de l’événement et une projection locale. Nos estimations impliquent qu’un ouragan réduit les flux mensuels d’importations américaines propres à une route de 5,4 à 16,0 %, ce qui représente une diminution globale de 1,15 à 3,42 % des importations annuelles de la côte ouest des États-Unis pour une saison des tempêtes moyenne. Nous ne trouvons aucune preuve de rattrapage du commerce dans les mois suivant un ouragan, ni aucune indication que les produits sont réacheminés vers d’autres ports ou par d’autres modes de transport (p. ex., l’avion). À l’aide de nos estimations combinées aux scénarios climatiques du Groupe d’experts intergouvernemental sur l’évolution du climat (GIEC), nous quantifions un éventail de coûts qui pourraient découler des ouragans futurs si les routes commerciales restent inchangées

This paper quantifies the impact of hurricanes on seaborne international trade to the United States. Using geocoded hurricane data mapped to satellite tracking data for commercial ships, we identify hurricane intersections on sea-trade routes between U.S. and foreign ports. Matching the timing of hurricane-trade route intersections with monthly U.S. port-level trade data, we isolate the unanticipated effects of a hurricane hitting a trade route using two separate identification schemes: an event study and a local projection. Our estimates imply that a hurricane reduces route-specific monthly U.S. import flows by 5.4% to 16.0%, leading to an aggregate loss of 1.15% to 3.42% of annual U.S. west coast imports for an average storm season. We find no evidence of trade catching up in the months following a hurricane nor any evidence of rerouting to other ports or other transportation modes (e.g., air). Using our estimates in combination with climate scenarios from the Intergovernmental Panel on Climate Change, we quantify a range of costs of future hurricane disruptions that could occur if trade routes remain fixed.

Related Organizations
Keywords

F18, Q54, ddc:330, F14, International topics, Climate change, C22, C5

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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