The massive US stimulus package aimed at blunting the worst recession there in 70 years, created up to 2.1 million jobs in the final three months of 2009.
A report from the US Congressional Budget Office claims the $787bn package boosted the American economy by 3.5% and lowered the unemployment rate by up to 2.1% in the final quarter of last year.
The report comes as President Barack Obama pushes for further measures to bring down the US jobless rate before November's congressional elections.