Assuming we have an external estimate of age 0, this method refits to the ordinary Beers single age results, remaining constrained to the original 5-year age groups and smoothly blending into ages greater than 10.
graduate_beers_johnson(Age0, pop5, pop1)
numeric. An estimate of age 0.
numeric. Matrix of age-period population counts in 5-year age groups.
numeric. Matrix of age-period population using Beers ordinary (or some other) method.
A matrix of single age population estimates.
This has not been tested using
pop1 as generated from other methods, such as
the Beers modified, Sprague, or Grabill methods. Called internally by
Stover J, Johnson P, Zaba B, Zwahlen M, Dabis F, Ekpini RE (2008). “The Spectrum projection package: improvements in estimating mortality, ART needs, PMTCT impact and uncertainty bounds.” Sexually Transmitted Infections, 84(Suppl 1), i24--i30.