And the Republicans are lying about it:
The Congressional Budget Office said Wednesday that President Obama’s 2009 stimulus package continues to have a significant effect.
The bill raised fourth-quarter 2011 gross domestic product by as much as 1.5 percent, it states, and lowered the unemployment rate by as much as 1.1 percentage points.
Here's a prediction of the Republican response: But the stimulus didn't work and the numbers are a conspiracy by the Obama administration.
This is fact, they'll say. And the very carefully calculated mathematical numbers are a lie.