Download or read book The Force of Mortality at Ages 80 to 120 written by A. Roger Thatcher and published by . This book was released on 1998 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph employs new data to re-assess the relative merits of various contending models that address the change in the probability of dying between the ages of 80 and 120 years of age. The book analyses the population data of thirteen countries, all of which have the sufficiently long data histories necessary to draw solid conclusions.