Full border closures reduced bilateral trade by roughly 19% for a typical country pair, implying a 23% hit to global trade in Q2 2020. Road and air were hit hardest.
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Travel restrictions during the pandemic acted like classic border frictions, raising the cost of moving goods across borders by a wide margin, according to a working paper that uses a gravity-model framework with internal trade flows.
A full border closure reduced bilateral trade by roughly 19% for a typical country pair, the study found. That implied a hit to global trade of about 23% in the second quarter of 2020.
The effects were not uniform. Geographically close trading partners saw larger trade losses. Road and air shipments were significantly disrupted. Seaborne and rail trade, by contrast, were not.
That interaction between distance and transport mode created wide cross-country variation in the overall trade impact. Some countries were able to close borders at a much lower cost to trade flows than others, the paper said.
The study found no evidence of long-run scarring from the restrictions. Trade rebounded strongly once restrictions were eased, with a temporary overshooting pattern.
The paper adds a specific mechanism to the broader debate about pandemic-era supply-chain disruption. Travel restrictions did not just slow people movement. They functioned as a measurable, economically meaningful barrier to goods trade, with the size of the effect depending on how a country's trade was structured by distance and transport mode.
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