exogenous cycle

ex·og·e·nous cy·cle

the portion of a parasitic life cycle occurring outside the host.
References in periodicals archive ?
735-79), who cite Hayek in a footnote to the following paragraph that explains the difference between endogenous and exogenous cycle theories:
Endogenous and exogenous cycle theorists disagree and consider MC respectively as an endogenous and stochastic element.
Exogenous cycles are either temporary, heavily damped random deviations from a stable long-run growth path or permanent stochastic fluctuations in the growth path which both require repeated stochastic impulses to generate typically observed recurrent and irregular fluctuations.