CNB paper questions strength of ‘border effect’

National borders may not reduce trade as much as previously thought

cnb
The Czech National Bank

National borders reduce trade, but not by as much as many studies suggest, according to research published by the Czech National Bank (CNB).

In Do borders really slash trade? A meta-analysis, authors Tomáš Havránek and Zuzana Iršová combine 1,271 estimates of the 'border effect' from 61 studies, controlling for study quality and examining the sources of heterogeneity in the literature.

They find recent innovations in estimating the border effect "systematically affect" the results, including the

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