In-Depth Notes on Inflation

INFLATION DEFINITION

  • Inflation: Increase in the overall price level across a basket of goods and services over time (usually annually).
  • Leads to decline in the purchasing power of money.

CONSUMER PRICE INFLATION

  • Consumer Price Index (CPI): Measures the rate of change in prices for a basket of goods and services purchased by households.
  • A shopping basket metaphor: Represents total cost influenced by price changes of items.
  • CPI indices reflect changing costs of this basket, ideally including all consumer goods and services from various outlets.

COMPONENTS OF CPI BASKET (2014 ALLOCATION)

  • Allocation of items and their respective weight percentages in total CPI:
    • Food & Non-Alcoholic Beverages: 11.2% - High price variation (23%)
    • Alcohol & Tobacco: 4.5% - Low price variation (4%)
    • Clothing & Footwear: 7.2% - Medium price variation (11%)
    • Housing & Household Services: 12.9% - Medium price variation (5%)
    • Furniture & Household Goods: 6.0% - Medium price variation (10%)
    • Health: 2.4% - Medium price variation (3%)
    • Transport: 15.2% - Medium price variation (6%)
    • Communication: 3.2% - High price variation (1%)
    • Recreation & Culture: 14.4% - High price variation (17%)
    • Education: 2.2% - High price variation (1%)
    • Restaurants & Hotels: 12.0% - Low price variation (8%)
    • Miscellaneous Goods & Services: 8.8% - High price variation (11%)

CHARACTERISTICS OF INFLATION

  • Accompanied by a rise in price level.
  • Generally caused by excessive money supply.
  • Occurs post full employment.
  • Can be classified as either demand-pull or cost-push inflation.
  • Essence of inflation is excessive demand relative to supply.

TYPES OF INFLATION

Demand-Pull Inflation
  • Caused by a rise in aggregate demand, shifting the aggregate demand curve (AD) to the right.
  • Graphical Representation:
    • Initial Aggregate Demand (AD₀) moves to AD₁, resulting in higher average price levels (P).
Cost-Push Inflation
  • Result of rising production costs (e.g. raw materials, wages).
  • As production costs increase, aggregate supply (AS) shifts to the left.
  • Graphical Representation:
    • From AS₀ to AS₁; causes a rise in average price levels with falling real output.

STAGFLATION

  • Occurs when output declines while prices rise, often due to rising costs.
  • Cost shocks create difficult circumstances for policymakers, requiring measures that often lead to even higher prices.

INFLATIONARY SPIRAL

  • Self-reinforcing trend with demand-pull and cost-push inflation interplaying.
  • Cycle includes:
    1. Increased aggregate demand.
    2. Rising product prices.
    3. Higher wages.
    4. Increased production costs.
    5. Further price rises.

CAUSES OF INFLATION

Demand-Pull Inflation
  • Stems from increased consumption (C), investment (I), government spending (G), or net exports (X-M).
  • Formula: Y < C + I + G + X - M
Cost-Push Inflation
  • Driven by:
    • Wage increases.
    • Rising costs of raw materials.
    • Higher costs for imported components.
INFLATIONARY SPIRAL
  • High living costs press for wage hikes, raising production costs and trigger price increases, leading to further wage demands.

MONETARIST VIEW OF INFLATION

  • Monetarists attribute inflation to excessive money supply, suggesting that increased money supply correlates with higher aggregate demand, leading to inflation at full employment.
  • Graphical Representation:
    • Increased money supply results in higher price levels (AD shifts right).

POLICIES TO CONTROL INFLATION

Fiscal Policy
  • Options include:
    • Increasing taxes (income tax, VAT).
    • Cutting government spending to reduce aggregate demand.
  • Effective in a growing economy; more challenging in a recession.
Monetary Policy
  • Focus on controlling money supply and interest rates:
    • Higher interest rates to decrease spending.
    • Managing the required reserve ratio (RRR).
Other Approaches
  • Wage Control: Limiting wage growth to reduce cost-push inflation.
  • Supply-Side Policies: Improving competitiveness to manage inflationary pressure.
  • Hyperinflation: Might require redenomination of currency to restore confidence.

REDUCING COST-PUSH INFLATION

  • Addressing cost push due to price shocks (e.g. oil prices) is complex as it can simultaneously lower growth while raising prices.