The first three months she was not well
Back in October 2008, just after the investment bank Lehman Brothers collapsed, the International Monetary Fund unveiled its forecasts for growth in 2009. The IMF is the global lender to national governments; its economic pronouncements are highly respected. So what did it predict? The US would grow 0.1% in 2009, countries in the euro zone 0.2% and the world as a whole 2.6%. The actual outturns were declines of 3.5%, 4.2% and 2.6% respectively.
This lamentable short-sightedness was not unique. […]
To be fair to economists, there are two reasons why their forecasts are often likely to be wrong. The first is that humans are not inanimate objects; we change our behaviour and we watch the news. If every economist forecast a recession for 2013 and the predictions were widely publicised, businesses would cancel their investment programmes and consumers would start saving, not spending, for fear of losing their jobs. The recession would occur now, not next year.
Second, the economy is a complex mechanism with many working parts. Economists cannot run real-time experiments in the same way as scientists; operating one version of the economy with high interest rates and another with low rates, as a pharmacologist can offer one patient a new drug and another a placebo. There is no way of isolating the various factors that affect growth.
But there are more fundamental questions about the nature of the subject beyond the failure of economists to make accurate forecasts.
photo { Mathew Scott }
