The ups may be marked by indicators like high growth and low unemployment while the downs are generally defined by low or stagnant growth and high unemployment. Given its relationship to the phases of the business cycle, unemployment is but one of the various economic indicators used to measure economic activity. For most detailed information about how various economic indicators and their relationship to the business cycle, check out A Beginner’s Guide to Economic Indicators.
Parkin and Bade go on to explain that despite the name, the business cycle is not a regular, predictable, or repeating the cycle. Though its phases can be defined, its timing is random and, to a large degree, unpredictable.
The Phases of the Business Cycle
While no two business cycles are exactly the same, they can be identified as a sequence of four phases that were classified and studied in their most modern sense by American economists Arthur Burns and Wesley Mitchell in their text “Measuring Business Cycles.” The four primary phases of the business cycle include:
These four phases also make up what is known as the “boom-and-bust” cycles, which are characterized as business cycles in which the periods of expansion are swift and the subsequent contraction is steep and severe.
Hei! What About Recessions?
A recession occurs if a contraction is severe enough. The National Bureau of Economic Research (NBER) identifies a recession as a contraction or significant decline in economic activity “lasting more than a few months, normally visible in real GDP, real income, employment, industrial production.”
Along the same vein, a deep trough is called a slump or a depression.