Description: It is believed that exponential growth of mortality with age (Gompertz law) is followed by a period of deceleration, with slower rates of mortality increase at older ages. We compared the performance (goodness-of-fit) of two competing models-the Gompertz model and the logistic (Kannisto) model using data for 22 birth cohorts of U.S. men and women in the age interval 80-105 years. In all cases the Gompertz model fits mortality data significantly better than the Kannisto model. Another approach to study mortality patterns at advanced ages is based on Life table Aging Rate (LAR). It was found that for all studied 24 single-year birth cohorts LAR does not change significantly with age in the age interval 80-100 years suggesting the validity of Gompertz law. These results suggest that mortality deceleration at advanced ages is not a universal phenomenon, and human survival follows the Gompertz law up to very old ages.

Description: Abstract: It is believed that exponential growth of mortality with age (Gompertz law) is followed by a period of deceleration, with slower rates of mortality increase at older ages. We compared the performance (goodness-of-fit) of two competing models-the Gompertz model and the logistic (Kannisto) model using data for 22 birth cohorts of U.S. men and women in the age interval 80-105 years. In all cases the Gompertz model fits mortality data significantly better than the Kannisto model. Another approach to study mortality patterns at advanced ages is based on Life table Aging Rate (LAR). It was found that for all studied 24 single-year birth cohorts LAR does not change significantly with age in the age interval 80-100 years suggesting the validity of Gompertz law. These results suggest that mortality deceleration at advanced ages is not a universal phenomenon, and human survival follows the Gompertz law up to very old ages

Description: A glossary of terms.

Description: A call for essays issued by the SOA Health and Long Term Care Sections on the visions for the future of the U.S. health care system.

Description: A call for essays issued by the SOA Health and Long Term Care Sections on the visions for the future of the U.S. health care system.

Description: The table of contents for the Winter 2000 issue of the Conversations newsletter.

Description: Informal discussion 2017 LT100 transcript for Session 1C: Impact of Aging: Biggest Current Policy Challenges from the U.K./U.S./Canada as a Result of Aging?

Description: Table of Contents for the Expanding Horizons Issue 26, April 2003.

Description: Odd patterns in mortality curves can be caused by bad data. The author hypothesizes that the negatively sloped mortality rates at the highest ages for U.S. males are caused by overstating age at death, and the low mortality rates for Japanese females by failure to report deaths. The paper upholds the first hypothesis but soundly defeats the second. The paper also demonstrates the impact of mishandling incurred but unreported deaths.

Description: Abstract: Odd patterns in mortality curves can be caused by bad data. The author hypothesizes that the negatively sloped mortality rates at the highest ages for U.S. males are caused by overstating age at death, and the low mortality rates for Japanese females by failure to report deaths. The paper upholds the first hypothesis but soundly defeats the second. The paper also demonstrates the impact of mishandling incurred but unreported deaths.