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This is a very complicated issue that is far beyond what Zhang has described.
His solution is to use anchor for monetary supply.
That may or may not work. It may work in some time and in some situations but may not in others.
Whether it is constant supply, or controlling interest rate to target inflation, or to using an anchor, there doesn't appear to have a universally agreed the "best" method.
The main difference lies in whether the monetary authority should be more active or less active to intervene.
Further, I am not sure there is a big difference between targeting inflation and using an anchor of the index of a basket of goods.
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