The third issue of the Longevity Bulletin sets some basic actuarial relationships between average lifespan and the variation of lifespan within a population in the context of some emerging theories from recent studies in demography.

Discussion of longevity or mortality often focuses on an average measure. Usually the measure is life expectancy, which is the average remaining lifespan of a population. Life expectancy is often used as a proxy measure for the overall health of a population. But for a full profile of population longevity or health the extent of variation needs to be investigated.

  • Describes how and why length of life varies
  • Shows how variation in length of life generally has reduced as populations live longer
  • Considers what this may mean for the variation of longevity in future.

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For more information about the Longevity Bulletin please contact the Research and Knowledge Team.

research@actuaries.org.uk