title: Changes in childlessness for all women in the United States: A reply to Spencer.
abstract: Abstract   The analysis of changes in childlessness as opposed to structural correlates of childlessness is quite new. Our focus on indicators of such changes called for a macro-analytic framework which would permit the test of changing features of population characteristics and the relationship between structural changes in different population cohorts. An appropriate data set was one that would permit the analysis ofchanging levels ofchildlessness in age cohorts and the changes in population characteristics which would offer possible explanations for the changing childlessness pattern.
authors.forename: G F
authors.initials: GF
authors.lastname: De Jong
authors.forename: R R
authors.initials: RR
authors.lastname: Sell