The main result of the quick reactions of the Federal Reserve (the Fed) and the European Central Bank (ECB) to the Covid-19 crisis are that more than 20% of their public debt is now held by these central banks and that the balance sheet of the ECB is now near 50% of GDP (33% for the Fed). Two...

The 2007-2008 financial crisis demonstrated both the responsibilities that central bankers, alongside other actors, bear for turbulences of this kind as well as how economics can be used to provide central bankers and governments with the understanding and tools that they need to prevent the...