An assessment of the accuracy of official population estimates of those aged 90 and over in England and Wales.
Methodology
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Accuracy of official high-age population estimates, in England and Wales: an evaluation
Assesses the quality of the component input data for official mid-year population estimates for ages 80 and over (deaths registrations; census estimates; and migration estimates). The method used to distribute the official age 90 and over mid-year estimate to single years of age above age 90 (the Kannisto-Thatcher method) is also assessed.