3.6 Demand management - fiscal policy

Fiscal policy changes government spending, taxation and transfers to influence demand, output, employment, distribution and debt.

The budget affects aggregate demand directly and incentives indirectly; financing and implementation determine the net effect.

Name the instrument, target and likely transmission.

Higher public investment can raise demand now and productive capacity later.

A budget deficit is a flow in a period; debt is the accumulated stock.

Government revenue includes direct taxes, indirect taxes, sales of goods and services by state-owned enterprises, and proceeds from selling government assets. Expenditure includes current spending on recurring operations and wages, capital spending on long-lived assets such as infrastructure, and transfer payments that redistribute income without buying current output. Classify the item before predicting AD, capacity, equity or budget effects: an asset sale is revenue but not recurring tax income, while a transfer supports household income but is not direct government purchase of output.

Fiscal policy may pursue growth, employment, price stability, equity, external balance and sustainability.

Goals can conflict across time and groups; a policy should state its priority and constraint.

Identify objective, time horizon and affected stakeholders.

A transfer may reduce poverty but increase spending unless financed elsewhere.

There is no single “good” fiscal stance without context.

Expansionary fiscal policy raises spending or cuts net taxes to support demand; contractionary policy does the reverse to reduce demand or debt pressure.

The effect depends on multiplier, interest rates, imports, confidence and spare capacity.

Match policy direction to the macro problem and state a trade-off.

During a recession, temporary infrastructure spending may raise output; near full capacity it may add inflation.

Policy direction does not guarantee the intended outcome.

Expansionary fiscal policy raises government spending or lowers taxes, shifting AD right to close a recessionary gap; contractionary policy lowers spending or raises taxes, shifting AD left to close an inflationary gap. In the monetarist/new-classical diagram, compare equilibrium with vertical LRAS at potential output. In the Keynesian diagram, the output-price mix depends on whether equilibrium lies on the flat, upward-sloping or vertical AS section. Label the initial gap, policy-induced AD shift and new equilibrium rather than assuming identical effects in both models.

The multiplier is the ratio of the final change in national income to an initial autonomous spending change; leakages reduce its size.

Consumption propensity, taxes, saving and imports determine repeated spending rounds.

Apply the multiplier consistently and state assumptions.

If MPC is 0.75 in a simple model, multiplier is 1/(1−0.75)=4; a $10m injection could raise income by$40m in the model.

The calculated result is not a guaranteed real-world effect.

Use $k=1/(1-MPC)$ in the simple two-sector model, or $k=1/(MPS+MPT+MPM)$ when saving, taxation and imports are leakages. The final modelled income change is $\Delta Y=k\times\Delta J$, where $\Delta J$ is an autonomous change in investment, government spending or exports. Example: if $MPS=0.2$, $MPT=0.1$ and $MPM=0.2$, then $k=1/0.5=2$. A $30 million rise in government spending gives a modelled$60 million rise in GDP. Keep propensities and monetary units consistent.

Fiscal policy effectiveness depends on timing, multiplier, implementation capacity, financing, confidence, exchange rates and the state of the economy.

Long lags or supply constraints can weaken a well-designed policy; targeted spending may work better than broad demand stimulus.

Identify the binding constraint and evidence before judging.

A stimulus arrives after a downturn has ended, so it may intensify inflation rather than stabilise output.

A policy can be appropriate yet ineffective.

Constraints include political pressure over taxes and spending, recognition/decision/implementation time lags, sustainable-debt limits and—at HL—crowding out. Strengths include targeting particular sectors or groups and the potency of direct government spending in a deep recession when private demand is weak. Evaluate growth, unemployment and price stability separately: stimulus is likelier to raise real output with spare capacity and a large multiplier, but near capacity, with import leakages or delayed delivery, it may mainly raise prices or debt.

Automatic stabilizers change the budget and demand without a new discretionary decision as income changes, such as progressive taxes and unemployment benefits.

They cushion shocks quickly but may weaken incentives or create deficits during prolonged downturns.

Trace how income changes tax/benefit flows and aggregate demand.

When unemployment rises, benefit payments increase and tax receipts fall, supporting household spending.

Automatic does not mean costless or perfectly targeted.

Crowding out occurs when government borrowing raises interest rates or competes for resources, reducing private investment or consumption.

The effect is stronger near capacity or when money supply does not accommodate borrowing; in a slump, unused resources may make it small.

State the financing condition and compare private response with public spending.

A deficit-funded expansion raises rates and delays business investment when banks face limited funds.

Crowding out is conditional, not inevitable.

In the loanable-funds version, plot the real interest rate vertically and quantity of funds horizontally. Deficit-financed government borrowing shifts demand for funds right, raising the equilibrium rate and reducing interest-sensitive private investment—the crowding-out effect. Alternatively, show fiscal expansion raising AD and money demand, with higher rates weakening private spending. Crowding out is stronger near full capacity or with a fixed money supply, and weaker in a deep recession with idle resources or accommodating monetary policy.