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Cairns-Blake-Dowd (or CBD) model

\kɛrnz\-\bleɪk\-\daʊd\ \ˈmɑdəl\

A mathematical model for projecting historical trends in mortality improvements into the future.

It allows both the average level of mortality and the rate at which mortality increases with age to vary year-by-year. It can also be readily-extended to allow for cohort effects to be captured. 

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