Fiscal policy has a stabilizing effect on an economy if the budget balance—the difference between expenditure and revenue—increases when output rises and decreases when it falls. For instance, if output suddenly contracts, policymakers can let tax revenues fall along with income (or even deliberately cut tax rates) and let unemployment benefits increase with the number of unemployed. This maintains income and purchasing power for individuals, and supports demand. Policymakers can also raise demand directly by deliberately spending more. Either way, higher deficit (or a lower surplus) effectively cushions the blow on output.

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