The average design effects for statistics estimated from the base-year National Longitudinal Study data are presented. Attempts to partition the effects into those due to stratification, clustering, and unequal weighting are discussed. The expected increases in subpopulation sample sizes due to oversampling are calculated and compared with the…

A study was undertaken of transfer students in postsecondary institutions, based on data from the base year and first and second followups of the National Longitudinal Study of the High School Class of 1972. Its specific objectives were to: (1) obtain national estimates of the number and proportion of students in the categories of four-year to…

Longitudinal measures of change are the most important kinds of estimates being produced from the National Longitudinal Study of the High School Class of 1972 (NLS). Several topics are presented in this report, most of which build on previous variance components analyses. The major areas covered are effects of stratification and clustering,…

The National Longitudinal Study of the High School Class of 1972 obtained data for 23,451 students, of whom 16,683 completed the base-year questionnaire; 21,350 completed the first follow-up; and 20,872 completed the second follow-up. This report describes the methodology for minimizing bias in the data which might be caused by nonresponse to such…

Using data from the National Longitudinal Study of the High School Class of 1972, the National Center for Education Statistics undertook a study of dropouts in higher education. Specifically, the study was designed to discover: (1) to what extent students withdraw from institutions of higher education before completion, and how these rates might…

The report traces the activities which led to the development of the adjusted weights--beginning with the basic National Longitudinal Study design, the base-year weight calculations, and the resurvey procedures. Next, the report describes the first follow-up weight calculations (including unadjusted student weights), nonresponse adjustment…

An efficiency study was conducted of the sampling design used for the National Longitudinal Study of the High School Class of 1972 (NLS), and the change variables used in the first followup. Nine alternative designs were compared, using a cost model based upon the number of schools and students sampled. Fourteen change variables and eight domains…

The first set of National Longitudinal Study (NLS) data was analyzed to derive composite scores to be used in subsequent analyses. The composites include a general ability measure, a socioeconomic status (SES) index, and factor scores from factor analyses of sets of question items measuring goals, attitudes, and other psychological attributes. The…

The study shows how data obtained in the National Longitudinal Study of the High School Class of 1972 has been used to answer some questions about the federal strategy for awarding financial aid. The questions considered are: (1) What expectations did the senior class of 1972 planning to enter postsecondary education have about how they would meet…

Since the mean score for a sample composed of several subgroups can be viewed as the sum of the mean of each subgroup weighted by the proportional size of the subgroup, then the mean change in a time period--in this case, from 1972 to 1980--is the sum of the differences between the means for each subgroup, with each mean weighted by its…

An empirical approach is taken to the problem of predicting effects of student financial aid programs on postsecondary enrollment rates and patterns. A model of students' enrollment decisions is developed and used to estimate the likely effects of alternative award policies for the Basic Educational Opportunity Grant (BEOG) program. The analysis…