FTAlphaville reports that some people believe that surging commodity prices might be good for Japan, because they will make deflation go away.OK, this is a failure to understand the principle.
Why does deflation have a depressing effect on the economy? Two reasons. First, it reduces money incomes while debt stays the same, so it worsens balance sheet problems, reducing spending. Second, expectations of future deflation mean that any borrowing now will have to be repaid out of smaller wages (if the borrower is a household) or smaller profits (if the borrower is a firm.) So expected future deflation also reduces spending.
So, does a rise in food and energy prices do anything to alleviate these problems? No. In fact, it makes them worse, by reducing purchasing power. So while the commodity surge may temporarily lead to rising headline prices in Japan, the underlying deflation problem won’t be affected at all.
In a way, this is another illustration of the need to differentiate among inflation measures. It’s not exactly the same as the usual case for focusing on core inflation, but it’s related. And once again, the point is that looking at “the” inflation rate is a bad guide for policy.
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