Depression (economic)

In economics, a depression is a sustained, long-term downturn in economic activity in one or more economies. It is a more severe economic downturn than a recession, which is a slowdown in economic activity over the course of a normal business cycle.

A depression is an unusual and extreme form of recession. Depressions are characterized by their length, by abnormally large increases in unemployment, falls in the availability of credit (often due to some form of banking or financial crisis), shrinking output as buyers dry up and suppliers cut back on production and investment, large number of bankruptcies including sovereign debt defaults, significantly reduced amounts of trade and commerce (especially international trade), as well as highly volatile relative currency value fluctuations (often due to currency devaluations). Price deflation, financial crises and bank failures are also common elements of a depression that do not normally occur during a recession.

In the United States the National Bureau of Economic Research determines contractions and expansions in the business cycle, but does not declare depressions. Generally, periods labeled depressions are marked by a substantial and sustained shortfall of the ability to purchase goods relative to the amount that could be produced using current resources and technology (potential output). Another proposed definition of depression includes two general rules:

There are also differences in the duration of depression across definitions. Some economists refer only to the period when economic activity is declining. The more common use, however, also encompasses the time until economic activity has returned close to normal levels.

A recession is briefly defined as a period of declining economic activity spread across the economy (according to NBER). Under the first definition, each depression will always coincide with a recession, since the difference between a depression and a recession is the severity of the fall in economic activity. In other words, each depression is always a recession, sharing the same starting and ending dates and having the same duration.

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