In this EconPol Policy Brief Daniel Gros cautions countries with high debt ratios not to simply rely on low interest rates to make their (Covid-19) debt sustainable. Now that the health emergency is subsiding, governments have to chart a new course for public finance. The starting point is a...

In a federation of sovereign states, common debt can provide insurance against idiosyncratic shocks even without any intended, ex ante transfers. This insurance property arises automatically when the common debt service is financed by a levy on members that is proportional to national income....