Inflation refers to a general increase in the prices of goods and services in an economy over time. When inflation occurs, each unit of currency buys fewer goods and services. Repetitive price increases erode the purchasing power of money. Inflation is caused by factors such as increases in the money supply, rising production costs, and expectations of future price increases. Methods for controlling inflation include monetary policies that restrict money supply growth, fixed exchange rates, wage and price controls, and cost of living adjustments.