Closing borders has always been a typical reaction to pandemics in the history of humanity, and the responses to Covid-19 mark no difference. Initiatives to limit the diffusion of the virus has put the closure of national borders under the spotlight worldwide. However, national scale offers a...

Gino Gancia, Giacomo Ponzetto and Jaume Ventura have written an extremely interesting paper on a topic that is very timely for the global economy. In this article, I will first argue that GPV have succeeded in formalizing their hypothesis, and that while providing very suggestive analytical...