But, because it takes some time before changes in Bank Rate affect inflation, it is important that the Monetary Policy Committee look through this short-run volatility and try to understand where inflation might be heading in the medium term. That poses a real challenge. None of us can foresee the future. To assess the likelihood of different possible outcomes for inflation, we examine all the available information – official statistics, business surveys, and reports from around the country, including those from our team in Wales. Then we make a judgement about the outlook for inflation. That judgement cannot be made on the basis that just because certain developments seem to have forecast inflation in the past they will do so again. Such correlations are not stable over time. We have to try to discover the driving forces behind the mosaic comprising all the different pieces of information that we examine each month. To understand what is likely to happen in the economy, we have to behave like the child who cannot stop asking “why?” Why is output growing so steadily? Why did recorded employment fall last quarter? Why are money and credit rising so rapidly? Why have oil prices picked up? And each answer inevitably provokes another question “why?” So setting interest rates is not straightforward. Our job, in fact, is rather like taking part in a “spot the ball” competition.
There is no simple or self-evident answer to the question of what path of interest rates will be necessary to bring inflation back to the 2% target and keep it there. By now you must be asking your own “why?” question – why is he keeping us from such a splendid dinner? So I will not detain you. I have tried to explain this evening why interest rates have gone up. Each month we try to spot the shocks, evaluate their implications for inflation, and set interest rates to meet the 2% target. We do that to provide a backdrop of macroeconomic stability so that you can focus on the really important questions for your businesses. Why is that product selling better than this one? Why is my competitor changing his prices? And, most important, why did the Wallabies run the Welsh defence ragged in Brisbane, where Wales lost by almost as big a margin as England did to South Africa? I don’t have the answers to those questions. But, of one thing I can assure you, in terms of the economy we will never stop asking “why?”  BIS Review 63/2007  3