Bubbles are usually viewed as a threat to financial stability. This paper takes a more nuanced view. The world economy is going through an episode of Secular Stagnation, where the equilibrium rate of return on capital r is below the growth rate of the economy g. As is well-known, rational...

Debt-to-GDP ratios have grown to unprecedented levels in many industrialised economies. To combat this threat, the authors call for a global debt brake following the Swiss or German example. The debt brakes should be incorporated into national constitutions and monitored by independent...