In other words we are trying to maintain overall, macroeconomic, stability in a much broader sense, in the medium- and longer- term and not just the shortterm; and the Government's inflation target is the criterion against which our success, or otherwise, in achieving that broader macro-economic stability is to be measured. Our problem is that we don't know with any great precision or confidence exactly what is happening on the supply-side:- we don't know that's to say precisely what rate of growth we can hope to sustain. We don't know precisely either what is currently happening, or what is likely to happen looking forward over the next couple of years or so, to overall, aggregate, demand. And nor do we know precisely what the full impact of a change in interest rates will be on aggregate demand, or how long it will take before the full impact is felt. Ours is not a precise science. In fact it's more of an art than a science. And, although we bring as much economic and statistical science to bear as we can, we know that our forecasts, and indeed our policy judgements, are subject to a range of error. They can't be accurate to every last digit. So, we can't expect to hit the inflation target all the time, but by consistently aiming to do so we can hope to get reasonably close to the target on average over time.
The frustrating thing is that, with the best will in the world, there was not much that either we at the Bank or the UK Government could have done to ward off the pressures on UK manufacturing, which had their origins abroad. It's fairly obvious where we are talking about the global slowdown - with negative growth last year of about ½ % in Japan and very slow growth of just 1¼ % in the US and 1½% in the Eurozone. We can go to international meetings and encourage the respective authorities there to stimulate their economies, but there is nothing that we can do about it directly ourselves. It's perhaps less obvious that we cannot influence the exchange rate. Many people think that we could weaken sterling against the euro quite simply by cutting our interest rate relative to the interest rate in the eurozone. But it's not as simple as that. The US has reduced its interest rate far more aggressively than the ECB over the past year or so, but the dollar is actually stronger against the euro than it was to begin with; and the same is true, to a lesser degree, of ourselves, here in the UK, with sterling also stronger against the euro (though weaker against the dollar) than it was a year ago. So there was nothing much - as I say - that we could have done directly to affect these depressing effects coming from the global economy and the resulting weakness of external demand on the UK.