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PEDAR: Research Methodology From Bachelor's Degree To Work
The Baccalaureate and Beyond Longitudinal Study
Accuracy of Estimates
Data Analysis System
Statistical Procedures
Differences Between Means
Adjustment of Means to Control for Background Variation
Executive Summary
References
Full Report (PDF)
Executive Summary (PDF)
The Baccalaureate and Beyond Longitudinal Study


The data analyzed in this report came from the First and Second Follow-ups of the Baccalaureate and Beyond Longitudinal Study1 (B&B:93/94 and B&B:93/97), a study that tracks the experiences of a cohort of college graduates who received baccalaureate degrees during the 1992–93 academic year and were first interviewed as part of the National Postsecondary Student Aid Study (NPSAS:93). This group's experiences in the areas of academic enrollments, degree completions, employment, public service, and other adult decisions have been followed through 1997. The data derived from this survey provide critical information about college graduates' postsecondary education outcomes, including graduate and professional program access, labor market experience, and rates of return on investment in education.

The B&B:93/94 survey was the first follow-up interview of NPSAS:93 participants who received their bachelor’s degrees between July 1992 and June 1993. Of 12,500 NPSAS:93 respondents who were identified as potentially eligible for the first follow-up survey, about 1,500 were determined to be ineligible. A total of 10,080 eligible individuals completed the 1994 interview.

The B&B:93/97 survey is the second follow-up interview of the B&B cohort. The first follow-up interview (B&B:93/94) collected information from respondents 1 year after they received the bachelor’s degree; the second follow-up (B&B:93/97) collected data 4 years after they received the bachelor’s degree. Data collection for B&B:93/97 took place between April and December 1997. A total of 11,192 individuals in the B&B cohort were determined eligible for follow-up in 1997. For the second followup, the number of interviews completed was 10,093, yielding a response rate of 90 percent. A total of 9,274 individuals (83 percent of the sample) responded to all three rounds of the B&B study. Referred to as "the B&B panel sample," these respondents became the base sample of the analyses presented in this report.

The NPSAS:93 sample, while representative and statistically accurate, was not a simple random sample. Instead, the survey sample was selected using a more complex three-step procedure with stratified samples and differential probabilities of selection at each level. Postsecondary institutions were initially selected within geographic strata. Once institutions were organized by zip code and state, they were further stratified by control (i.e., public; private, not-for-profit; or private, for-profit) and degree offering (less-than-2-year, 2- to 3-year, 4-year nondoctorate-granting, and 4-year doctorate- granting).2

For more information about the NPSAS:93 survey, refer to the Methodology Report for the National Postsecondary Student Aid Study, 1992–93 (NCES 95–211, Washington, DC: U.S. Department of Education, National Center for Education Statistics, 1995).

For more information on procedures for the Baccalaureate and Beyond First Follow-up Study (B&B:93/94), consult the Baccalaureate and Beyond Longitudinal Study: 1993/94 Methodology Report (NCES 96–149, Washington, DC: U.S. Department of Education, National Center for Education Statistics, 1996).

For more information on procedures for the Baccalaureate and Beyond Second Follow-up Study (B&B:93/97), consult the Baccalaureate and Beyond Longitudinal Study: 1993/97 Methodology Report (NCES 1999–159, Washington, DC: U.S. Department of Education, National Center for Education Statistics, 1999).

Sample weights

B&B:93/97 final weights were calculated by making a nonresponse adjustment to the baseline B&B weight calculated for B&B:93/94. This baseline B&B weight is an adjustment of the baseline NPSAS:93 weight. All analyses in this report are weighted to compensate for unequal probability of selection into the B&B sample and to adjust for nonresponse. The B&B panel weight, based on respondents who participated in all three surveys, is used in the report. A complete description of the weighting methodology is available in the methodology reports cited above.


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National Center for Education Statistics - http://nces.ed.gov
U.S. Department of Education