"This paper provides an overview, using extensive documentary material, of developments in U.K. macroeconomic policy in the last half-century. Rather than focusing on well-known recent changes in policy arrangements (such as the introduction of inflation targeting in 1992 or central bank...

Actual policy decisions are made in real time and are not irrevocable. These observations are mundane, but most policy modeling has neglected them. We show that when policy is made in an environment of uncertainty, costs of switching policies give the option to wait positive value. This insight...

We document that monetary policy inertia can help alleviate problems of indeterminacy and non-existence of stationary equilibrium observed for some commonly-studied monetary policy rules. We also find that inertia promotes learnability of equilibrium. The context is a simple, forward-looking...

"Death of a Theory," presented in St. Louis. January 13, 2012.

"SNEAK PREVIEW: Death of a Theory." Presented at the Korea-America Economic Association, Chicago, Illinois. January 7, 2012.

There exist sticky price models in which the output response to a government spending change can be large if the central bank is nonresponsive to inflation. According to this “expected inflation channel," government spending drives up expected inflation, which in turn, reduces the real...

A model is constructed in which consumers and banks have incentives to fake the quality of collateral. Conventional monetary easing can exacerbate these problems, in that the mispresentation of collateral becomes more profitable, thus increasing haircuts and interest rate differentials. Central...