Countries try to beat COVID-19 by limiting exports of medical supplies and cutting tariffs. Germany, France, South Korea and many more countries limit the exports of masks and protective gear for health workers, while the Trump administration quietly announces the exclusion of some medical products from its tariffs on China. Nadia Rocha (The World Bank) joins to discuss historical evidence on the “multiplier effect” of one country’s export restriction leading to another, and another…

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