Periodicity Definition

- Apr 27, 2020-

periodicity definition

Cyclicity (cyclical fluctuation), also known as cyclical fluctuation, is a wave-shaped or oscillating change around a long-term trend presented in a time series. Periodicity is usually caused by business and economic activities. It is different from trend changes, not continuous movements in a single direction, but alternating fluctuations between fluctuations; it is also different from seasonal changes, which have a relatively fixed law , And the change cycle is mostly one year, and the cyclical fluctuations have no fixed law, the change cycle is more than one year, and the cycle length is different. Cyclicity is usually caused by changes in the economic environment.