Fiscal Stimulus or Fiscal Depressant?

The “fiscal multiplier” is one of the basic building blocks of Keynesian economics and the centerpiece of modern macroeconomic analysis of the effects of fiscal policy. Contrary to the impression given by Paul Krugman and other proponents of fiscal stimulus, however, there is no clear consensus among economists regarding the size of the multipliers that are used to estimate the amount of additional income created by an additional dollar of government spending (or tax cuts).