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The Data File Documentation reports on the procedures and methodologies employed during the Education Longitudinal Study of 2002 base year, first, and second follow-ups, with special emphasis on the second follow-up (2006). The document is designed to provide guidance for users of the restricted-use data as released in Electronic Codebook (ECB) format (NCES 2008-346) and also contains information that will be valuable to users of the public-use Data Analysis System (DAS). Included in the documentation are the following: an overview of the study and its predecessor studies; an account of instrumentation and high school records (academic transcript) collection; documentation of the sample design, weighting, imputation, and design effects; a summary of the data collection methodology and results, including detailed response rates; a description of data preparation and processing activities including linkage to ancillary external data sets and creation of composite variables; and an overview of data file structure and contents. The following are appended: (1) Cross-Cohort Comparisons; (2) Quick Guide to Using the ELS:2002/06 Data; (3) Synopsis of the ELS:2002 Second Follow-up Field Test Report; (4) Data File Documentation Errata; (5) Flow Chart and Facsimile for the Second Follow-up Questionnaire; (6) Occupational Coding Crosswalk; (7) Transcript Standard Errors and Design Effects; (8) Propensity Models Versus Weighting Cell Approaches to Nonresponse Adjustment: A Methodological Comparison; (9) Average Weight Adjustment Factors; (10) Standard Errors and Design Effects; (11) Nonresponse Bias Tables; (12) Variable List for the ELS:2002 Electronic Codebook (ECB) and Data Analysis System (DAS); (13) Second Follow-up Composite Variables; (14) Data Imported Into ELS:2002 From External Sources; and (15) Glossary of Terms. (Individual appendices contain references.) [For "Education Longitudinal Study of 2002: Base-Year to First Follow-Up Data File Documentation. NCES 2006-344," see ED489083.]

This manual has been produced to familiarize data users with the procedures followed for data collection and processing for the base year of the Education Longitudinal Study of 2002 (ELS:2002). It also provides the necessary documentation for use of the public-use data files, as they appear on the ELS:2002 base year Electronic Codebook (ECB). Most social scientists and policy analysts should find the data set organized and equipped in a manner that facilitates straightforward production of statistical summaries and analyses. This manual provides extensive documentation of the content of the data files and how to access and manipulate them. Chapter 1 serves as an introduction to ELS:2002. It includes an overview and history of the National Center for Education Statistics (NCES) program of longitudinal high school cohorts, summarizes the ELS:2002 objectives, and supplies an overview of the base year and longitudinal study design. Chapter 2 describes the data collection instruments, including both the development and content of the student, parent, school administrator, teacher, and library media center questionnaires, as well as the student assessments in reading and mathematics, and the facilities checklist. The sample design and weighting procedures used in the base year study are documented in chapter 3, as are weights, imputation, and the calculation of design effects. Data collection schedules, training, procedures, and results are presented in chapter 4. Chapter 5 describes data preparation and processing, including the receipt control system, optical scanning, machine editing, and data file preparation. Chapter 6 describes the contents of the data files, including the data structure and analysis populations. The appendices include, among other topics, an introduction to the public-use ECB (appendix A); the ELS:2002 questionnaires (appendix B); a glossary of special terms used in the ELS:2002 documentation (appendix E), and a crosswalk to the National EducationThis manual has been produced to familiarize data users with the procedures followed for data collection and processing for the base year of the Education Longitudinal Study of 2002 (ELS:2002). It also provides the necessary documentation for use of the public-use data files, as they appear on the ELS:2002 base year Electronic Codebook (ECB). Most social scientists and policy analysts should find the data set organized and equipped in a manner that facilitates straightforward production of statistical summaries and analyses. This manual provides extensive documentation of the content of the data files and how to access and manipulate them. Chapter 1 serves as an introduction to ELS:2002. It includes an overview and history of the National Center for Education Statistics (NCES) program of longitudinal high school cohorts, summarizes the ELS:2002 objectives, and supplies an overview of the base year and longitudinal study design. Chapter 2 describes the data collection instruments, including both the development and content of the student, parent, school administrator, teacher, and library media center questionnaires, as well as the student assessments in reading and mathematics, and the facilities checklist. The sample design and weighting procedures used in the base year study are documented in chapter 3, as are weights, imputation, and the calculation of design effects. Data collection schedules, training, procedures, and results are presented in chapter 4. Chapter 5 describes data preparation and processing, including the receipt control system, optical scanning, machine editing, and data file preparation. Chapter 6 describes the contents of the data files, including the data structure and analysis populations. The appendices include, among other topics, an introduction to the public-use ECB (appendix A); the ELS:2002 questionnaires (appendix B); a glossary of special terms used in the ELS:2002 documentation (appendix E), and a crosswalk to the National Education