Inflation targeting in an open economy insolves a number of complexities that do not arise with inflation targeting in a clises economy. One of these is that central banks in open economies have to decide how to repond to changes in the exchange rate.

In most industrial countries, official interest rate changes tend to be 'smooth'. That is, rates are adjusted relatively infrequently and is small steps. Yet the path of interest rates that emerges as optimal from macroeconomic models is, in general, considerably more volatile. So are the paths of ...