A beast of a burden

Megan McArdle writing in The Atlantic

It seems to me that the burden of proof ought naturally to be on the stimulus proponents to satisfy the public that their highly theoretical models are basically sound, especially for the parts of the bill that aren’t tax cuts or transfer payments. Let’s recall that the evidence for this kind of stimulus working in this kind of situation basically rests on a single instance (World War II)–the other two times it was tried (Japan in the 1990s and America in the 1930s) the economy basically rolled along in the doldrums for the rest of the decade.

Proponents say that that’s because there wasn’t enough stimulus, which is possibly true, but not really satisfying, because first, how do we know this package is enough, and second, that leaves us with a belief in the virtues of stimulus that is essentially non-falsifiable. We might as well move macroeconomic policy to the Office of Faith-Based Initiatives.

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