4.3 Fiscal Policy, Monetary Policy, and Central Banks

Policy Tools and Central Bank Transmission

Fiscal policy is the use of government spending, taxation, and transfers to influence economic activity. Expansionary fiscal policy raises aggregate demand through higher spending, lower taxes, or higher transfers. Contractionary fiscal policy reduces demand through lower spending or higher taxes.

Automatic stabilizers work without new legislation. Progressive income taxes collect less when income falls, and unemployment benefits rise when job losses increase. These mechanisms soften recessions and restrain booms. Discretionary policy requires active decisions, so recognition, action, and implementation lags can be substantial.

The fiscal multiplier measures the change in output from a change in spending or taxes. A spending increase usually has a more direct effect than a tax cut because households may save part of a tax cut. The multiplier is larger when there is unused capacity and smaller when imports, savings, or crowding out absorb demand.

Crowding out occurs when government borrowing pushes interest rates higher and reduces private investment. The risk is greater when the economy is near full capacity and capital markets expect persistent deficits. In a recession with idle resources, crowding out may be limited.

Monetary policy is conducted by a central bank. Common tools include policy rate targets, open market operations, reserve requirements, standing lending facilities, forward guidance, and asset purchases. Expansionary monetary policy lowers rates or increases reserves to ease financial conditions. Contractionary policy raises rates or reduces liquidity to slow demand and inflation.

The policy rate influences short-term interest rates, bank lending, asset prices, exchange rates, and expectations. Lower policy rates tend to reduce borrowing costs, support investment and consumption, raise asset values, and weaken the currency. Higher policy rates tend to do the opposite. The effect depends on expectations and financial system health.

Money creation often appears through the banking system. When banks receive reserves and make loans, deposits can expand. The money multiplier is limited by reserve requirements, currency leakage, excess reserves, and loan demand. In stressed periods, reserves may rise without rapid loan growth if banks or borrowers are cautious.

Central bank mandates vary. Price stability is common, often through explicit or implicit inflation targeting. Some central banks also emphasize employment or output stability. Financial stability can become important when credit markets are impaired. Independence can improve inflation credibility, but elected officials still control fiscal policy.

Real interest rates equal nominal rates minus expected inflation. A central bank can raise nominal rates but still have loose policy if expected inflation rises more. Exam questions often ask whether policy is stimulative or restrictive in real terms, not just whether the nominal policy rate changed.

Unconventional policy includes quantitative easing, credit easing, negative policy rates, and targeted lending programs. Quantitative easing usually purchases longer-term securities to lower long-term yields and support liquidity. It expands the central bank balance sheet, but its effect on inflation depends on transmission to spending and credit.

Structured Aid: Policy Comparison

A practical exam sequence is to identify the policy tool, decide whether it is expansionary or contractionary, trace the primary transmission channel, then consider constraints. Do not assume a tax cut, rate cut, or bond purchase has identical effects across countries. Openness, debt level, inflation credibility, and banking conditions all matter.