How to make the numbers pencil
Josh Barro, "The Final Word on Mitt Romney's Tax Plan", Bloomberg 10/12/2012:
Rosen also depends on aggressive assumptions about macro-level dynamic effects, where taxes rise not because individual taxpayers report more taxable income but because the economy grows as a whole. In other words, he is depending on rosy — and not necessarily warranted — economic assumptions to make the numbers pencil. [emphasis added]
"To make the numbers pencil"? Economists can certainly make numbers do almost anything, but can they also make numbers crayon, or chalk, or dry-erase marker? And what would it mean if they did?
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