There's no perfect forecaster, no perfect indicator of inflation...Exchange rates reflect inflation pressures. They may also reflect the balance of trade and other factors. So there's no single optimal indicator of inflation. My personal strategy, therefore, is to be very eclectic and to look at a wide range of indicators. And among those is commodities, gold, exchange rates, the whole list. I think interest rates, real- side indicators, surveys, expectations, there's a whole list of variables which can be useful in forecasting inflation. And I think one has to be very open minded about using whatever information one has.