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Berger, Martijn P. F. – Journal of Educational Statistics, 1986
The problem of choosing the most efficient design (longitudinal, mixed longitudinal, or cross-sectional) to estimate polynomial parameters for time-structured data in educational and psychological research is considered. The comparison of efficiencies shows that the assumed degree of the polynomial is crucial for selecting the most efficient…
Descriptors: Age Groups, Cohort Analysis, Comparative Analysis, Cross Sectional Studies