This memorandum demonstrates a variance components methodology for partitioning the overall design effect (D) for a ratio mean into stratification (S), unequal weighting (W), and clustering (C) effects, so that D = WSC. In section 2, a sample selection scheme modeled after the National Longitudinal Study of the High School Class of 1972 (NKS)…

The growing complexity of policy decisions in such areas as education and manpower necessitates increased research, which in turn requires an adequate data base and adequate methodology. Recognition that the variables affecting the vocational and educational choices of high school graduates are interrelated and require examination from several…