from Paul Krugman's blog,
Nobody would care about the size of the monetary base except for the belief that increasing the base leads to a rise in prices.
The underlying belief of all the people accusing Ben Bernanke of doing something dastardly is that "printing money" has caused or will cause high inflation in the ordinary sense.
A couple of notes: for the commodity prices it matters which month you start, because they dropped sharply between August and September 2008.
When you triple the monetary base, the resulting inflation shouldn't be something that depends on the fine details — unless the model is completely wrong.
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