Inflation is a term used by economists to define broad increases in prices. Inflation is the rate at which the price of goods and services in an economy increases. Inflation also can be defined as the rate at which purchasing power declines. For example, if inflation is at 5% and you currently spend $100 per week on groceries, the following year you would need to spend $105 for the same amount of food.

Economic policymakers like the Federal Reserve maintain constant vigilance for signs of inflation. Policy makers do not want inflation psychology to settle into the minds of consumers. In other words, policymakers do not want consumers to assume that prices always will go. Such beliefs lead to things like employees asking employers for higher wages to cover the increased costs of living, which strains employers and, therefore, the general economy.

Stagflation is a term used by economists to define an economy that has inflation, a slow or stagnant economic growth rate, and a relatively high unemployment rate. Economic policymakers across the globe try to avoid stagflation at all costs. With stagflation, a country's citizens are affected by high rates of inflation and unemployment. High unemployment rates further contribute to the slowdown of a country's economy, causing the economic growth rate to fluctuate no more than a single percentage point above or below a zero growth rate.

Stagflation was experienced globally by many countries during the 1970s when world oil prices rose sharply, leading to the birth of the Misery Index. The Misery Index, or the total of the inflation rate and the unemployment rate combined, functions as a rough gauge of how badly people feel during times of stagflation. The term was used often during the 1980 U.S. presidential race.