d'Albis, Hippolyte; Collard, Fabrice - In: Demographic Research 29 (2013) 23, pp. 617-640
This paper proposes the use of optimal grouping methods for determining the various age groups within a population. The cutoff ages for these groups, such as the age from which an individual is considered to be an older person, are then endogenous variables that depend on the entire population...