It appears fair to say that an increase in total government size of ten percentage points in tax revenue or expenditure as a share of GDP is on average associated with an annual lower growth rate of between one-half and one percentage point.

FORBES: Study From Swedish Economists Allows Us To Quantify Cost Of Bush-Obama Spending Binge

The next biggest expenditure, I believe, in the composition of the total is the payroll tax cut.

WHITEHOUSE: Press Briefing