secular equilibrium


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sec·u·lar e·qui·lib·ri·um

a type of radioactive equilibrium in which the half-life of the precursor (parent) radioisotope is so much longer than that of the product (daughter) that the radioactivity of the daughter becomes equal to that of the parent with time.
References in periodicals archive ?
Moreover, because actual economic conditions are far from being stationary, Lange might have rightly argued that a characterisation of a secular equilibrium would give no indication of the actual trend of real economies.
In a nutshell, Lange's aim, on the one hand, is to characterise a persistent position of rest by determining relative normal prices and, on the other hand, his awareness that a secular equilibrium would be achieved, if at all, only in the very long run, forcibly led him to place interest rate theory in the realm of the traditional, static or long-period notion of equilibrium.