Accuracy of Nearly Extinct Cohort Methods for Estimating Very Elderly Subnational Populations

Figure 3

Das Gupta’s death ratios. Source: Andreev [17]. Note: numbers in shaded parallelograms are period-cohort deaths. A death ratio for a single cohort is calculated as the ratio of deaths in year to deaths in year . Shown above are deaths for three cohorts ( to ) used to estimate deaths for cohort .