My latest in The Conversation
There’s more to good policy than increasing GDP
By John Quiggin, University of Queensland
Economists are regularly criticized for worrying about Gross Domestic Product (GDP), and similar measures. The classic statement of the case was by Robert F Kennedy:
“Too much and too long, we seem to have surrendered community excellence and community values in the mere accumulation of material things. Our gross national product … if we should judge America by that – counts air pollution and cigarette advertising, and ambulances to clear our highways of carnage. It counts special locks for our doors and the jails for those who break them. It counts the destruction of our redwoods and the loss of our natural wonder in chaotic sprawl. It counts napalm and the cost of a nuclear warhead, and armoured cars for police who fight riots in our streets. It counts Whitman’s rifle and Speck’s knife, and the television programs which glorify violence in order to sell toys to our children.
“Yet the gross national product does not allow for the health of our children, the quality of their education, or the joy of their play. It does not include the beauty of our poetry or the strength of our marriages; the intelligence of our public debate or the integrity of our public officials. It measures neither our wit nor our courage; neither our wisdom nor our learning; neither our compassion nor our devotion to our country; it measures everything, in short, except that which makes life worthwhile. And it tells us everything about America except why we are proud that we are Americans.”
Much of the time, this criticism is misplaced. For the purposes of medium-term macroeconomic management, that is, trying to maintain full employment and low inflation, it is important to measure how much economic activity is going in aggregate. If aggregate demand is weak, for example, it is sensible to stimulate the economy by cutting interest rates or increasing public spending. GDP is the best single measure of economic activity, precisely because it captures all output, taking existing market prices as the measure of value.
In the longer term though, the problems with GDP start to matter, even in relatively narrow issues of economic policy. In measuring economic performance, as opposed to activity, GDP suffers from three major drawbacks in this respect
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It’s Gross – that is, depreciation of physical and natural capital is not deducted
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It’s Domestic – that is, it measures output produced in Australia, even though the resulting income may flow overseas[1]
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It’s a Product – the ultimate aim of economic activity is not production in itself but the income it generates, which should be taken to include the economic value of leisure, household work and so on
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