Inflation & Deflation
→ Inflation → A sustained increase in the general price level of goods and services in an economy over a period of time
→ Deflation → A sustained decrease in the general price level of goods and services, leading to an increase in the purchasing power of money
→ Disinflation → A fall in the rate of inflation (prices are still rising, but at a slower pace)
→ Consumer Prices Index (CPI) → A measure that examines the weighted average of prices of a basket of consumer goods and services
→ Steps to Calculate CPI → Select a base year, conduct a household expenditure survey to identify the basket of goods, assign weights based on proportion of income spent, record price changes, and construct a weighted price index
Example:
→ If spending on food makes up 30% of average household expenditure, it receives a higher weight in the CPI basket than entertainment at 10%
Analysis:
→ Weighted Price Index Formula → CPI = (Price of Basket in Current Year ÷ Price of Basket in Base Year) × 100
→ Purchasing Power Impact → As inflation rises, the real purchasing power of money falls, meaning fewer goods can be bought with the same nominal amount
Evaluation:
→ CPI reflects an average household’s spending and may not represent individual spending patterns (e.g., non-car owners affected by petrol prices)
→ CPI changes may take time to account for modern technology improvements and new consumer substitute goods
Causes of Inflation:
1. Demand-Pull Inflation:
→ Definition → Inflation caused by an increase in total (aggregate) demand that exceeds the economy’s productive capacity
→ Triggers → Lower interest rates, increased consumer confidence, tax cuts, or higher government spending
→ Mechanism → Excess demand pulls up price levels when firms operate near full capacity and cannot expand supply immediately
2. Cost-Push Inflation:
→ Definition → Inflation caused by an increase in the costs of production for firms
→ Triggers → Higher raw material costs, wage increases exceeding productivity gains, higher indirect taxes, or currency depreciation increasing import costs
→ Mechanism → Higher production costs push firms to increase selling prices to maintain profit margins
Example:
→ An increase in global crude oil prices raises transport costs for businesses, causing cost-push inflation across retail sectors
Analysis:
→ Wage-Price Spiral → Rising prices cause workers to demand higher wages → firms raise prices further to cover wage costs → fuels cost-push inflation
→ Imported Inflation → A weaker domestic currency increases the price of foreign raw materials, raising domestic production costs
Evaluation:
→ Demand-pull inflation is often accompanied by economic growth and expanding employment, whereas cost-push inflation causes stagflation
→ Deflation caused by technological breakthroughs (supply-side deflation) can be beneficial, whereas demand-deficient deflation triggers recessions
Consequences of Inflation & Deflation:
Effects on Financial Groups:
→ Savers → Lose out if real interest rates are negative (inflation rate exceeds the nominal interest rate on savings)
→ Lenders → Lose out because the money repaid in the future has reduced purchasing power
→ Borrowers → Gain because the real value of their debt decreases over time
Consequences on Key Economic Agents:
→ Consumers → Real income falls if wages do not keep pace with inflation; lower purchasing power
→ Workers → Demand higher nominal wages to maintain real living standards, risking industrial disputes
→ Producers / Firms → Face shoe-leather costs, menu costs (frequent price update costs), and difficulty in long-term planning
→ The Economy → Reduced international competitiveness as exports become expensive; potential loss of foreign investment
Analysis:
→ Uncertainty & Investment → High inflation causes business uncertainty → firms delay capital investment → reduces long-run productive potential
→ Deflation Spiral → Falling prices → consumers delay spending → falling sales → redundancies → further demand drops
Evaluation:
→ Low and stable inflation (around 2%) is considered positive as it encourages consumption and business expansion
→ High or unpredictable inflation distorts price signals and reallocates wealth unfairly from lenders to borrowers
Policies to Control Inflation & Their Effectiveness:
1. Monetary Policy:
→ Measures → Contractionary monetary policy (raising central bank interest rates and restricting credit availability)
→ Mechanism → Higher interest rates increase borrowing costs and reward saving, reducing consumer spending and investment demand
→ Effectiveness → Highly effective against demand-pull inflation, but can slow down economic growth and increase unemployment
2. Fiscal Policy:
→ Measures → Contractionary fiscal policy (increasing direct taxes such as income tax and cutting public spending)
→ Mechanism → Reduces disposable income and government demand, dampening overall price levels
→ Effectiveness → Directly reduces total spending, but high taxes may reduce worker incentives and prove politically unpopular
3. Supply-Side Policies:
→ Measures → Deregulation, labor market reforms, subsidies for research, and measures to promote competition
→ Mechanism → Reduces cost of production and increases efficiency, helping to counter cost-push inflation
→ Effectiveness → Sustainable long-term solution that lowers inflation without reducing GDP, but takes significant time to show results
Example:
→ The central bank raises official interest rates from 2% to 5% to curb rapid credit growth and lower inflation
Analysis:
→ Policy-Cause Alignment → Monetary contraction directly tackles demand-pull inflation; supply-side policies address cost-push pressures
→ Exchange Rate Channel → Higher domestic interest rates attract foreign capital inflows → strengthens exchange rate → lowers import prices
Evaluation:
→ Using demand-side policies to combat cost-push inflation can trigger higher unemployment and economic stagnation
→ External supply-side shocks (such as global commodity price spikes) are difficult for domestic policy instruments to control completely