9 Estimate birth years

The estimated the distribution of age differences among relatives (i.e. ageprior matrix) can be used to estimate the birth year of individuals for which this is unknown. A requirement is that these focal individuals have one or more parents, offspring, or siblings with known birth year or BY.min + BY.max; the more relatives and the more exact their birth years, the better the birth year estimate of the focal individual. This can be done with function CalcBYprobs(), with any pedigree.