ABSTRACT
Age Differences, Twenty Years of Aging, Generation-Separated Cohorts of Like Age, and Mental Health Continuity
Among all of the ways in which people may differ from each other, some have been identified by the behavioral sciences as “demographic variables.” Such variables have been defined as “culturally significant properties or conditions, differentially manifested by all individuals, that provide a basis for classifying a population into a limited series of social segments or groups.”1
