Before revision: Governments require regional or national lockdowns in order to prevent the spread of COVID-19, which causes large economic stagnation in wide areas because the declines of the lockdowns diffuse to other regions through supply chains.
After revision: Governments require regional or national lockdowns in order to prevent the spread of COVID-19, which causes large economic stagnation in wide areas because the declines of the lockdowns has diffused to other regions through supply chains.