Linking DoT occupations to census occupations.
DoT Handbook:
1st Edition: 1939?-1949
2nd Edition: 1949 -1963
3rd Edition: 1965 -1974
4th Edition: 1976 -1990
4th Rev : 1991 -1998
Since 2000, the hanbook uses O*Net definition instead of DoT definition
Census occupation:
The occupation classification is different in each census. OCC1950 and OCC1990 are the two consistent category systems that Census Bureau created for long-run analysis.
The graph below shows the original source and quality of each known crosswalk.
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WidCenter crosswalks can be accessed from WidCenter-Legacy Crosswalks.
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IPUMS/BLS crosswalks can be found in IPUMS-Crosswalks.
The translation of occupation codes into the 1950 classification is particularly problematic for 1980 onward. The Census Bureau significantly reorganized the occupational classification scheme in 1980 and again in 2000. Comparisons across the post-1980 period and with earlier years will be more distorted than similar comparisons across other decades. Researchers focusing on these samples should consider using OCC1990. (IPUMS)
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DoT crosswalks were obtained mainly from digitized sources. We performed OCR either by ourselves or using existing work (DoT 3rd-4th, 4th-4th rev are based on Jeffrey Lin's work).
Going from 2nd edition DoT to the 4th edition or census OCC1990 could be a problem because both 2nd-3rd and 3rd(at 6-digit level)-4th are m:n (there is not a unique identifier in both sides of the merge).
