Attachment 1: Census Industrial & Occupational Classification Codes

Attachment 1: Census Industrial & Occupational Classification Codes
1990 and 2002 Industry and Occupation Codes
Through Round 5, respondent industry and occupation were coded using the 1990 census code frames. As part of the 2000 Decennial Census, the Census Bureau and the Bureau of Labor Statistics revised the industry and occupation code frames. Beginning with the Round 7 data release, 1990 codes are available for Rounds 1-5 jobs. Codes from the 2002 Census code frames are available for all jobs. In the future, only 2002 codes will be available for jobs that the youths report. The move to the new frame makes sense in part to maintain comparability with the Current Population Survey (CPS) and other federal surveys, which have adopted the new frame. In addition, using historical code frames becomes increasingly problematic over time as new industries and occupations arise that are inadequately handled in the old frame. At the same time, changing frames can introduce disruption into the longitudinal record; it may not always be appropriate to change frames whenever updates occur. The NLSY79 data continue to support codes to multiple historical frames in order to retain longitudinal comparability.
A second change underlies the shift to the 2002 code frame. While NORC had previously performed all coding to the 1990 code frames, the industry and occupation coding tasks were completed by the Census Bureau for the 2002 frames. There are documented differences in coding practices across the two organizations, so house effects in coding are likely to surface in the data. The process followed by the Bureau includes use of the respondents' reports of usual duties, title, etc., and contextual information on respondent income and education. Problem cases are selected for manual review by an experienced coder or coding supervisor. Rates of manual review are similar for the NLSY97 as for the CPS. Wherever possible the Census Bureau has attempted to implement for this survey the coding procedures in place for the CPS.
Users should note that the 2002 frame differs considerably from the 1990 frame in organization, level of granularity, and other characteristics (see the Census Bureau website at www.census.gov for more information). Analyses of NLSY97 as well as CPS data indicate that jobs within a single category of one frame may disperse broadly to a variety of codes in the other frame.
Military Industries and Occupations
Researchers should be aware of several issues regarding military industries and occupations. The questionnaire is designed so that respondents in the active Armed Forces should not be asked to report the industry and occupation of that job in the same questions that collect information about civilian jobs. Rather, respondents report their military occupational specialty as part of a series tailored to military jobs that also asks about the branch of the Armed Forces, the respondent's dates of enlistment, military pay grade, etc. This means that the military industry and occupation codes should appear very rarely in the NLSY97 data, occurring only if a respondent has a civilian job but is associated with the military in some way. However, some respondents in the active military answered the civilian jobs questions instead of the military questions in rounds 2 and 3, causing military respondents to be included in the industry and occupation variables as well as other regular employment questions like hourly rate of pay. This occurred for two reasons.
First, the question that identifies military jobs is YEMP-58500, the class of worker question, which asks whether the respondent's employer was the government, a private employer, a non-profit organization, a family business or farm, or the active Armed Forces. Respondents in the military should respond that they are in the active Armed Forces, and they are then asked the series of questions tailored to military jobs. However, some respondents with military jobs appear to have answered this question incorrectly; most of these respondents reported that they worked for the government. These respondents were then asked the set of questions about regular civilian employee jobs.
Second, some military respondents in round 3 were incorrectly routed through the civilian jobs section due to a programming error. If a respondent states that he or she is still employed with an employer reported in a previous round, the class of worker question is not asked. Instead, the respondent is routed to the correct series of questions based on a preset flag that identifies the job as military or civilian. However, this flag was not set correctly for respondents who reported military employment in round 2, and so these respondents were routed to the civilian series of questions in round 3.
These problems affected a very small number of respondents in rounds 2 and 3.However, researchers interested in civilian employment may want to remove these respondents from their analyses; conversely, users investigating military employment may want to include these respondents even though they did not answer the military series of questions. Researchers can identify respondents in the active Armed Forces by examining the variables MILFLAG and MILCODE on the employer (YEMP) roster. These roster items were edited to identify military jobs regardless of whether they were reported in the military or civilian section of the instrument. Virtually all military jobs appear as job #01 on the roster. Information about using roster variables in analyses is provided in Appendix 8 in this Codebook Supplement.
Cohorts
- NLSY97
- Topical Guide to the Data
- Asterisk Tables
- I. Employment, Unemployment, and Job Search (age restrictions as of interview date)
- II. Schooling (age restrictions as of 12/31/96)
- III. Training (age restrictions as of interview date)
- IV. Income, Assets, and Program Participation
- V. Family Formation (age restrictions as of end of previous calendar year--12/31/96 in rd 1, 12/31/97 in rd 2, and so on)
- VI. Family Background (age restrictions as of 12/31/1996)
- VII. Expectations
- VIII. Attitudes, Behaviors, and Time Use
- IX. Health (age restrictions as of 12/31/96)
- X. Political Participation
- XI. Environmental Variables (in main data set)
- Education
- Employment
- Household, Geography & Contextual Variables
- Family Background
- Marital History, Childcare & Fertility
- Income
- Health
- Attitudes
- Crime & Substance Use
- Asterisk Tables
- Intro to the Sample
- Using & Understanding the Data
- Other Documentation
- Get Data
- Topical Guide to the Data
- NLSY79
- Topical Guide to the Data
- Asterisk Tables
- Education
- Employment
- Employment: An Introduction
- Work Experience
- Jobs & Employers
- Class of Worker
- Discrimination
- Fringe Benefits
- Industries
- Job Characteristics Index
- Job Satisfaction
- Job Search
- Labor Force Status
- Military
- Occupations
- Time & Tenure with Employers
- Wages
- Work History Data
- Employer History Roster
- Business Ownership
- Retirement
- Household, Geography & Contextual Variables
- Family Background
- Marital History, Childcare & Fertility
- Income
- Health
- Attitudes
- Crime & Substance Use
- Intro to the Sample
- Using & Understanding the Data
- Other Documentation
- Codebook Supplement
- NLSY79 Attachment 3: Industrial and Occupational Classification Codes
- NLSY79 Attachment 4: Fields of Study in College
- NLSY79 Attachment 5: Index of Labor Unions and Employee Associations
- NLSY79 Attachment 6: Other Kinds of Training Codes
- NLSY79 Attachment 7: Other Certificate Codes
- NLSY79 Attachment 8: Health Codes
- NLSY79 Attachment 100: Geographic Regions
- NLSY79 Attachment 101: Country Codes
- NLSY79 Attachment 102: Federal Information Processing Standards (FIPS)
- NLSY79 Attachment 103: Religion Codes
- NLSY79 Attachment 106: Profiles of American Youth (ASVAB Data/AFQT Scores)
- NLSY79 Appendix 1: Employment Status Recode Variables (1979-1998 and 2006)
- NLSY79 Appendix 2: Total Net Family Income Variable Creation (1979-2014)
- NLSY79 Appendix 3: Job Satisfaction Measures
- NLSY79 Appendix 4: Job Characteristics Index 1979-1982
- NLSY79 Appendix 5: Supplemental Fertility and Relationship Variables
- NLSY79 Appendix 6: Urban-Rural and SMSA-Central City Variables
- NLSY79 Appendix 7: Unemployment Rate
- NLSY79 Appendix 8: Highest Grade Completed & Enrollment Status Variable Creation
- NLSY79 Appendix 9: Linking Employers Through Survey Years
- NLSY79 Appendix 11: Round 12 (1990) Survey Administration Methods
- NLSY79 Appendix 12: Most Important Job Learning Activities (1993-94)
- NLSY79 Appendix 13: Intro to CAPI Questionnaires and Codebooks
- NLSY79 Appendix 14: Instrument Rosters
- NLSY79 Appendix 15: Recipiency Event Histories
- NLSY79 Appendix 16: 1994 Recall Experiment
- NLSY79 Appendix 17: Interviewer Characteristics Data
- NLSY79 Appendix 18: Work History Data
- NLSY79 Appendix 19: SF-12 Health Scale Scoring
- NLSY79 Appendix 20: Round 20 (2002) Early Bird and Income Recall Experiments
- NLSY79 Appendix 21: Attitudinal Scales
- NLSY79 Appendix 22: Migration Distance Variables for Respondent Locations
- NLSY79 Appendix 23: Revised Asset and Debt Variables and Computed Net Worth Variables
- NLSY79 Appendix 24: Reanalysis of the 1980 AFQT Data from the NLSY79
- NLSY79 Appendix 25: Center for Epidemiologic Studies Depression (CES-D) Scale
- NLSY79 Appendix 26: Non-Response to Financial Questions and Entry Points
- NLSY79 Appendix 27: IRT Item Parameter Estimates, Scores and Standard Errors
- NLSY79 Appendix 28: NLSY79 Employer History Roster
- Geocode Codebook Supplement
- Appendix 7: Unemployment Rates
- Appendix 10: Geocode Documentation
- Attachment 100: Geographic Regions
- Attachment 101: Country Codes
- Attachment 102: State FIPS Codes
- Attachment 104, Part A: 1981 Standard Metropolitan Statistical Areas (SMSAs)
- Attachment 104, Part B: 1983 Metropolitan Statistical Areas (MSAs)
- Attachment 104, Part C: 1983 Consolidated MSAs and Associated Primary MSAs (CMSAs and PMSAs)
- Attachment 104, Part D: 1983 PMSAs and Associated CMSAs
- Attachment 104, Part E: 1988 MSAs, CMSAs, and Associated PMSAs
- Attachment 104, Part F: 2004 MSAs, CMSAs, and Associated PMSAs
- Attachment 104, Part G: 2006 Core-Based Statistical Areas (CBSAs)
- Attachment 105: Addendum to FICE Codes
- Attachment 106: Codebook Pages for Geocode and Zipcode Variables
- Questionnaires
- Tutorials
- Errata
- Technical Sampling Report
- School & Transcript Surveys Documentation
- Codebook Supplement
- Get Data
- Topical Guide to the Data
- NLSY79 Child/YA
- Topical Guide to the Data
- Intro to the Sample
- Using & Understanding the Data
- Other Documentation
- Codebook Supplement
- Appendix A: HOME-SF Scales (NLSY79 Child)
- Appendix B: Composition of the Temperament Scales (NLSY79 Child)
- Appendix C: Motor & Social Development (NLSY79 Child)
- Appendix D: Behavior Problems Index (NLSY79 Child)
- Appendix D, Part 1: Composition of the BPI subscales
- Appendix D, Part 2a: BPI Anxious/Depressed Subscale
- Appendix D, Part 2b: BPI Antisocial Subscale
- Appendix D, Part 2c: BPI Dependent Subscale
- Appendix D, Part 2d: BPI Headstrong Subscale
- Appendix D, Part 2e: BPI Hyperactive Subscale
- Appendix D, Part 2f: BPI Peer Conflicts/Withdrawn Subscale
- Appendix D, Part 2g: BPI Full Scale
- Appendix D, Part 3a: BPI Internalizing Subscale
- Appendix D, Part 3b: BPI Externalizing Subscale
- Appendix D, Part 3c: BPI Total Scores
- Appendix E: Sample SPSSx Program for Merging NLSY79 Child/YA & Mother Files
- Appendix F: Sample SAS Program for Merging NLSY79 Child/YA & Mother Files
- Appendix G: NLSY79 Child Assessment Scores, Reference Numbers (2010-2014)
- Appendix H: Identification Codes in the Child and Young Adult Database
- Attachment 100: Codebook Pages for Young Adult Geocode Data
- Questionnaires
- Errata
- Errata for 2014 Child/Young Adult Release
- Data Addition: New Work and School Status Variables Created
- Errata for 2012 Child/Young Adult Release
- Errata for 2010 Child/Young Adult Release
- Errata for 2008 Child/Young Adult Release
- Errata for 2006 Child/Young Adult Release
- Errata for 2004 Child/Young Adult Release
- Errata for 2002 Child/Young Adult Release
- Errata for 2000 Child/Young Adult Release
- Errata for NLSY79 Child Interview Dates 1986-1992
- Research/Technical Reports
- Codebook Supplement
- Get Data
- NLS Mature and Young Women
- NLS Older and Young Men