Government Budget and the Economy | Class 12 Economics Notes

Box 5.1: Fiscal Policy

Fiscal policy refers to the use of government expenditure and taxation to influence the level of economic activity, output, and employment. Keynes emphasized fiscal policy as a tool to stabilize the economy by managing aggregate demand.

The government affects equilibrium income through two main channels:

1. Government Purchases (G): Directly increase aggregate demand.

2. Taxes (T) and Transfers (TR): Affect disposable income (YD = Y – T + TR), which influences consumption (C).

The consumption function with lump-sum taxes and transfers is:

C = C̄ + c × (Y – T + TR̄)

where C̄ is autonomous consumption and c is the marginal propensity to consume (MPC).

Aggregate demand (AD) is:

AD = C̄ + c × (Y – T + TR̄) + I + G

Equilibrium income (Y) satisfies:

Y = AD = C̄ + c × (Y – T + TR̄) + I + G

Solving for Y gives the equilibrium level of income.

Increasing government expenditure (G) shifts AD upward, increasing equilibrium income by a multiplier effect:

ΔY = (1 / (1 – c)) × ΔG

Reducing taxes (T) increases disposable income and consumption, but the tax multiplier is smaller in absolute value than the government expenditure multiplier:

Tax multiplier = – c / (1 – c)

The balanced budget multiplier (increase in G financed by equal increase in T) equals 1, meaning income increases by the amount of government spending increase.

With proportional taxes (T = tY), the multiplier decreases because taxes reduce the MPC out of income to c(1 – t). This acts as an automatic stabilizer, dampening fluctuations in consumption and income.

Transfers (TR) also affect income, but the multiplier is smaller than that of government spending:

ΔY = (c / (1 – c)) × ΔTR

Fiscal policy can be discretionary (deliberate changes in G or T) or automatic (built-in stabilizers like proportional taxes and welfare transfers). These mechanisms help stabilize the economy during booms and recessions.

📊 Diagram: Fig. 5.1 How does the Fiscal Policy try to achieve its basic objectives?; Fig. 5.2 Effect of a Reduction in Taxes; Fig. 5.3 Government and Aggregate Demand (proportional taxes make the AD schedule flatter); Fig. 5.4 Increase in Government Expenditure (with proportional taxes); Fig. 5.5 Effects of a Reduction in the Proportional Tax Rate; Fig. 5.1 Effect of Higher Government Expenditure; Fig. 5.2 Effect of a Reduction in Taxes; Why is the poor man crying? Suggest measures to wipe off his tears.

🔗 Connection: Leads to discussion on government debt and deficit implications.