Fiscal Policy to Reduce a Deflationary Gap Quiz

Discretionary fiscal policy faces significant timing challenges. Policymakers must first recognize the gap through economic data, which takes time. Legislation for new spending or tax cuts must then be debated and passed, creating further delays. Once enacted, the spending must be implemented, contracts awarded, and projects begun before money actually flows into the economy. These recognition, decision, and implementation lags mean fiscal stimulus may not reach the economy until the deflationary gap is already partially closed by the self-correction mechanism.

When the government borrows to finance fiscal stimulus, it increases the demand for loanable funds in financial markets. This can push interest rates higher, making borrowing more expensive for private businesses considering capital investment. The resulting reduction in private investment offsets some of the stimulative effect of government spending. However, crowding out is generally less severe during a deflationary gap because spare capacity keeps private investment demand weak and interest rate increases tend to be modest.

Fiscal stimulus closes the deflationary gap by raising aggregate demand through government spending or tax cuts, both of which shift the AD curve rightward. The multiplier amplifies the initial injection into a larger income effect. The LRAS does not shift in response to demand-side fiscal stimulus; it only changes when the economy's productive capacity grows through supply-side improvements. Confusing demand-side and supply-side effects is a common error in analyzing fiscal policy.

When the economy has spare capacity, unemployed workers and idle factories can be put to work to meet rising demand. Government spending or tax cuts increase aggregate demand, and businesses respond by hiring the unemployed and expanding production without needing to bid up wages or prices significantly. The stimulus translates primarily into higher real output and employment rather than inflation. Near full employment, the same stimulus would mainly raise prices with little real output gain.

Classical economists argue that flexible wages and prices allow the economy to self-correct relatively quickly from a deflationary gap without government intervention. They also argue that fiscal stimulus may be poorly timed due to implementation lags, arriving after the economy has already begun recovering and potentially overstimulating it into an inflationary gap. Additionally, government borrowing required to fund stimulus may crowd out private investment in the long run, reducing future growth.

The CARES Act of 2020 was one of the largest fiscal stimulus packages in US history, involving direct payments to households, expanded unemployment insurance, and support for businesses. It was passed in response to the severe economic contraction caused by the pandemic, which created a massive deflationary gap as consumer spending collapsed and unemployment surged. The CARES Act represents a textbook application of expansionary fiscal policy to counter a severe recessionary shock.

With MPC of 0.8, MPS equals 0.2, and the spending multiplier equals 1 divided by 0.2, which equals 5. To close a gap of 500 billion dollars using a multiplier of 5, the required spending is 500 divided by 5, which equals 100 billion dollars. The multiplier amplifies the 100 billion dollar spending increase into a 500 billion dollar rise in national income, precisely closing the deflationary gap. This calculation demonstrates why the multiplier is essential for sizing fiscal stimulus appropriately.

The MPC directly determines the spending multiplier through the formula 1 divided by MPS, where MPS equals 1 minus MPC. A higher MPC means households spend more of each additional dollar of income, creating larger rounds of subsequent spending. This produces a bigger multiplier. With a larger multiplier, each dollar of government spending generates more national income, meaning less initial spending is needed to close a given deflationary gap. The MPC is therefore a critical parameter in fiscal policy design.

Expansionary fiscal policy during a deflationary gap typically involves either increased government spending or tax cuts, both of which widen the gap between government expenditures and revenues. When expenditures exceed revenues, the government runs a budget deficit that must be financed through borrowing. This borrowing adds to the national debt. While this is a recognized cost of fiscal stimulus, policymakers typically judge it acceptable if the economic benefits of closing the deflationary gap and reducing unemployment outweigh the costs of higher debt.

The transmission mechanism of fiscal stimulus in the AD-AS framework is direct and clear. Government spending or tax cuts increase aggregate demand, shifting the AD curve rightward. As AD increases, the AD-SRAS intersection moves closer to or reaches the vertical LRAS at potential GDP. Real output rises toward potential, firms hire more workers to meet the growing demand, cyclical unemployment falls back toward the natural rate, and the deflationary gap narrows and eventually closes.

Keynes argued that allowing the self-correction mechanism to operate during a severe recessionary gap imposes enormous costs in terms of prolonged unemployment and wasted output. Wages are sticky downward due to contracts and social norms, slowing the adjustment. Active fiscal stimulus can shift aggregate demand more quickly than the labor market can self-correct, accelerating the return to potential output and reducing the human and economic costs of the deflationary gap.

The spending multiplier amplifies an initial fiscal injection into a larger total change in national income. When the government spends 100 billion dollars, workers and businesses receive income that they partly spend, creating new income for others who also spend a portion. This chain of spending continues across multiple rounds, with the total effect exceeding the original 100 billion dollar injection. The multiplier equals 1 divided by MPS, so a higher marginal propensity to consume produces a larger multiplier.

The fiscal multiplier equals 1 divided by MPS. With MPS of 0.25, the multiplier is 1 divided by 0.25, which equals 4. Total income change equals 200 billion dollars multiplied by 4, giving 800 billion dollars. This means each dollar of government spending generates 4 dollars of additional national income through successive rounds of spending and re-spending. Understanding this calculation is essential for policymakers sizing fiscal stimulus to close a deflationary gap.

A tax cut increases household disposable income, stimulating consumer spending. However, households save a portion of the additional income based on their MPS rather than spending it all immediately. This means the initial injection into aggregate demand from a tax cut is MPC times the tax change, not the full tax amount. A direct government spending increase injects the full amount in the first round, giving it a larger multiplier effect on national income than an equivalent tax reduction.

Automatic stabilizers work without explicit policy decisions. When unemployment rises during a recessionary downturn, unemployed workers receive unemployment insurance benefits that replace some of their income, supporting consumer spending. Progressive income taxes collect less from falling incomes, leaving households with relatively more disposable income. Both effects partially offset the decline in aggregate demand, reducing the size of the deflationary gap that discretionary fiscal stimulus needs to close.