Repeated surveys — a technique for asking the same questions to different samples of people — allows researchers the opportunity to analyze changes in society as a whole. This book begins with a discussion of the classic issue of how to separate cohort, period, and age effects. It then covers methods for modeling aggregate trends; two methods for estimating cohort replacement's contribution to aggregate trends, a decomposition model for clarifying how microchange contributes to aggregate change, and simple models that are useful for the assessment of changing individual-level effects.
A General Model for Decomposing Aggregate Change
The previous chapter described two methods for separating out the cohort replacement component of social change. In isolating the cohort replacement component, we seek only to account for the locus of observed change: Does the change derive from population turnover or from ...