Deflation and Money Supply

  • Deflation

  • Price levels in macroeconomics are determined by a weighted average of goods.

  • Inflation is the rate of change of prices.

  • Inflation is not constant and can be influenced.

  • Changes in government behavior, such as the Reserve Bank Act, can reduce the rate of inflation.

  • The Reserve Bank's KPI targets an inflation rate of 0-3%.

Money's Role

  • Money facilitates trade but doesn't create economic growth; technology does.

  • Increasing the money supply doesn't increase real goods and services.

  • If the money supply doubles without an increase in goods, prices will rise.

  • Increasing money supply leads to higher prices, not more products.

Money Market Model

  • Demand and supply in the money market determine the equilibrium price level.

  • Diagram: two y-axes (value of money and price level) and x-axis (quantity of money).

  • Price level (P) is the aggregate price level (measured by CPI).

  • Value of money is the reciprocal of P and influences the demand for money.

  • When the price level is low, the value of money is high, and the demand for money is high because money isn't losing value.

  • When the price level is high, the value of money is low, and the demand for money declines because money is losing value.

  • P = aggregate price level

Equilibrium

  • The intersection of money supply and money demand determines the equilibrium value of money and price level.

  • Increasing the money supply raises the price level; reducing it lowers the price level.

  • Demand for money depends on the utility derived from it; the value of money changes along the demand curve, but preferences don't.

  • Money supply changes result in price level changes.

Key Concepts

  • Inflation: An increase in the general price level (CPI).

  • Zero Inflation: A constant price level from year to year.

  • Deflation: A decrease in the general price level.

  • Disinflation: A decrease in the rate of inflation.

  • Real Interest Rate: Nominal interest rate minus inflation.

Classical Theory of Inflation

  • Money supply determines the long-run price level and inflation rate.

  • When the price level rises, the value of money falls.

  • Real interest rate (Fisher equation): real = nominal - inflation

  • Nominal rates are usually positive, but real rates can be negative if inflation exceeds the nominal rate.

Costs of Inflation

  • Reduces purchasing power of money.

  • Shoe Leather Costs: Increased search costs due to price uncertainty.

  • Menu Costs: Costs of changing prices (e.g., printing new menus).

  • Affects taxes: Inflation can push people into higher tax brackets.

  • Confusion and inconvenience due to price uncertainty.

  • Arbitrary redistribution of wealth, affecting those on fixed incomes more.

Deflation Effects

  • Deflation can lead consumers to delay purchases, hurting businesses.

  • Money is neutral: It only affects the price level and has no impact on the output of real goods/services.

  • Getting more money doesn't increase well-being if wages don't keep up with the price level.