Galí (2014) showed that a monetary policy rule that raises interest rates in response to bubbles can paradoxically lead to larger bubbles. This comment shows that a central bank that wants to dampen bubbles can always do so by raising interest rates aggressively enough. This result is different...

In a provocative paper, Galí (2014) showed that a policymaker who raises interest rates to rein in a potential bubble will only make a bubble bigger if one exists. This poses a challenge to advocates of lean-against-the-wind policies that call for raising interest rates to mitigate potential...

We develop a simple model of the interbank market where banks trade a long term, safe asset. We show that when there is a lack of opportunities for banks to hedge aggregate and idiosyncratic liquidity shocks, the interbank market is characterized by excessive price volatility. In such a...

Economists have believed for a long time that financial systems are fragile in the sense that small shocks can cause serious disruption. Research has focused on phenomena, such as bank runs, which affect the stability of individual institutions. Only recently has there been interest in the...

Positive and negative asset price bubbles and their relationship to monetary policy are considered. Positive bubbles occur when there is an agency problem between banks and the people they lend money to because the banks cannot observe how the funds are invested. This causes a risk shifting...

Empirical evidence suggests that banking panics are a natural outgrowth of the business cycle. In other words panics are not simply the result of "sunspots" or self-fulfilling prophecies. Panics occur when depositors perceive that the returns on the bank's assets are going to be unusually low....

Flawed government policies have been offered as an explanation for currency crises in most of the previous literature. With few exceptions, the role of the banking system is ignored. Empirical evidence suggests that in recent decades banking crises and currency crises have been linked. A model...