As the economist Francesco Saraceno has noted, the International Monetary Fund’s research department, which was always excellent, has become an extraordinary source of information and ideas in the Age of Blanchard. In particular, these days you can pretty much count on the semiannual World Economic Outlook to offer some dramatic new insights into how the world works.
And the latest edition is no exception.
The big intellectual news here is Chapter 4, which focuses on private investment. As the report notes, weak business investment has been a major reason for global economic weakness. But why is business investment so weak?
Broadly speaking, there are two views out there. One is that we have a lack of business confidence, driven by fiscal worries, a failure to make needed structural reforms and maybe even careless rhetoric. Conservatives in the United States in particular are fond of the “Ma! He’s looking at me funny!” hypothesis: the claim that President Obama, by occasionally suggesting that some businessmen have behaved badly in the past, has hurt their feelings and perpetuated the economic slump.
The other view is that business investment is weak because the economy is weak. Specifically, the argument is that the effects of household deleveraging and fiscal consolidation have produced slow growth, which has reduced the incentive to add capacity – the “accelerator” effect – and led to low investment that has further reduced growth.
The IMF comes down strongly for the second view. In fact, it finds that investment, if anything, has held up a bit better than one might have expected in the face of economic weakness. This is, interestingly, something I concluded a while back after looking at data in the United States during the height of the he’s-looking-at-me-funny era in 2010.
But wait, there’s more.
In order to deal with the problem of reverse causation – less investment can cause weak growth, and vice versa – the IMF adopts an “instrumental variables” approach. Loosely speaking, the IMF looks for episodes of weak growth that are clearly caused by other factors, so that it can be sure that falling investment is an effect rather than a cause. And the instrument the fund uses is fiscal consolidation: That is, it finds cases where spending cuts or tax hikes, or both, depress demand and, hence, investment.
What the IMF doesn’t say explicitly is that in using this procedure, it manages in passing both to refute a very widely held, but false, belief about deficits, and to confirm a highly controversial Keynesian proposition.
The false belief is that government deficits necessarily “crowd out” investment, so that reducing deficits should free up funds that lead to higher investment. Not so, says the IMF: When governments introduce deficit-reduction measures, investment falls instead of rising. This suggests that deficits crowd investment in, not out.
And there’s another way to look at it: When governments introduce austerity measures, they are trying to reduce their net borrowing – in effect, they are raising their savings rate.
What the IMF tells us is that such attempts to increase saving actually lead to lower, not higher, investment – and since saving equals investment, actual savings fall. So what we have here is an empirical confirmation of the existence of the paradox of thrift!
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