It seems everyone is talking about swine flu and the financial crisis, but they seem to be most persistently interested in what has gone wrong with the economy. After I explained the key points of this Nobel Prize Lecture by F A Hayek to my hairdresser this morning, she had confirmed in her mind what she always knew: that economists cannot discover all they need to make accurate predictions.
This is something we all need to understand.
What follows is a precis of that 1974 lecture (sometimes quoted verbatim). It explains why and how the economic policies of the time contributed to inflation and unemployment and it points the way out of our present and coming difficulties.
This is its message:
- Physical scientists can observe and measure the things that drive the sytems they are studying.
- Society, and therefore the economy, is not like a physical system: many of the most important factors cannot be seen or measured. Consider the thoughts and intended actions of millions of people at different times, for example.
- Economists and other social scientists, in their attempt to be scientific, ignore what they cannot measure.
- Therefore, many of the most important factors affecting the economy are not considered, while some of those factors which can be measured are deliberately controlled.
- The results are incorrect predictions and actions which positively harm society.
In a sentence: society is not a machine to be controlled, but a garden to be cultivated.
By the way, the remark about making astrologers look good is attributable to the Keynesian economist J K Galbraith:
The only function of economic forecasting is to make astrology look respectable.
The precis:
A Precis of “The Pretence of Knowledge”
The topic of this lecture is the chief practical problem of economists, who must now explain how to stop the accelerating inflation they have caused. In imitating the techniques of the physical sciences, economists have made grave errors of economic policy.
The assertion guided policy that there exists a positive correlation between total employment and the aggregate demand for goods and services. It implies we can permanently ensure full employment by maintaining total expenditure. This is fundamentally false and very harmful.
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