We review two nonstandard uses of the policy rate tool, which provide additional stimulus when interest rates are close to or at the effective lower bound—forward guidance and negative interest rate policy. In particular, we survey the use of these tools since the star otf the Great Recession,...

Economic uncertainty is a powerful force in the modern economy. Research shows that surges in uncertainty can trigger business cycles, bank runs and asset price fluctuations. But where do sudden surges in uncertainty come from? This paper provides a data-disciplined theory of belief formation...