i table of contents current population survey march 2001 abstract 1 overview introduction 2 cps sample questionnaire revisions to the processing system file structure 3 relationship files publications geographic limitations 7 weights earnings data matching how use dictionary 4 differences between 2000 and 5 index household record 6 family person alphabetical variable listing 8 12 19 glossary subject concepts 9 appendices appendix a industry classification codes for detailed digit recodes 01 51 major 14 11 longest job last year 00 47 group 15 ii b occupational