Inflation and Deflation

Inflation is the pervasive and sustained rise in the aggregate level of prices measured by an index of the cost of various goods and services. Repetitive price increases erode the purchasing power of money and other financial assets with fixed values, creating serious economic distortions and uncertainty.


Inflation results when actual economic pressures and anticipation of future developments cause the demand for goods and services to exceed the supply available at existing prices or when available output is restricted by faltering productivity and marketplace constraints. Sustained price increases were historically directly linked to wars, poor harvests, political upheavals, or other unique events.

Deflation involves a sustained decline in the aggregate level of prices, such as occurred during the Great Depression of the 1930s; it is usually associated with a prolonged erosion of economic activity and high unemployment. Widespread price declines have become rare, however, and inflation is now the dominant variable affecting public and private economic planning.