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...

Countries have pledged to stabilize global warming at a 1.5 to 2°C increase. Either target requires reaching net zero emissions before the end of the century, which implies a major transformation of the economic system. This paper reviews the literature on how policymakers can design climate...