So, to summarize: Mankiw is wrong that the stimulus consists mostly of Keynesian-type investments. So far, it has been closer to the tax cut end of the spectrum. But he's also wrong that the stimulus is not working. By the benchmark that he implicitly endorses -- GDP -- it's done very well. Mankiw is so wrong, in other words, that he may actually be right: the stimulus looks a lot like one he might have designed, and it's helping the economy.
HT Paul Kedrosky
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