But all of this is just old-timey price theory, the stuff that used to be taught in graduate economics departments. Today, even stimulus spending advocates have their Ph.D. defenders. But there’s no arguing with the data in the nearby table, and the fact that greater stimulus spending was followed by lower growth rates. Stimulus advocates have a lot of explaining to do. Their massive spending programs have hurt the economy and left us with huge bills to pay. Not a very nice combination.

Sorry, Keynesians. There was no discernible two or three dollar multiplier effect from every dollar the government spent and borrowed. In reality, every dollar of public-sector spending on stimulus simply wiped out a dollar of private investment and output, resulting in an overall decline in GDP. This is an even more astonishing result because government spending is counted in official GDP numbers. In other words, the spending was more like a valium for lethargic economies than a stimulant…

The evidence here is extremely damaging to the case made by Mr. Obama and others that there is economic value to spending more money on infrastructure, education, unemployment insurance, food stamps, windmills and bailouts. Mr. Obama keeps saying that if only Congress would pass his second stimulus plan, unemployment would finally start to fall. That’s an expensive leap of faith with no evidence to confirm it.