HISCO - OCC1950 CROSSWALK

Occupational categories were linked between HISCO and Occ1950 on the underlying occupations. Both HISCO and Occ1950 consist of multiple layers of occupational groups. HISCO is divided in 7 major, 76 minor, 296 unit, and 1,675 micro groups, which roughly correspond with: social classes, sectors, occupational groups, and occupational subgroups.

Occ1950 on the other hand is divided in 10 social classes and 269 occupational groups. HISCO’s micro groups and Occ1950’s occupational subgroups are based on a well-documented number of occupations, which can easily be compared and matched between both occupational coding schemes. In the translation from HISCO to Occ1950 1,675 occupational categories were collapsed into 229 Occ1950 unique occupational groups.

Although 40 occupational groups in Occ1950 could not be retrieved from HISCO, all occupations were successfully attributed to the right social class. Vice versa, 269 occupational groups in Occ1950 were recoded into 227 HISCO micro groups. Together these 227 unique codes are well-spread over the different branches of the HISCO tree, as they cover most of the unit groups. #Please note that this is not the crosswalk from Occ1950 to the intermediate HISCO used by the NAPP project, also known as OCCHISCO or NAPPHISCO.

This crosswalk can be retrieved from: github.com/rlzijdeman/o-clack/tree/master/crosswalks/occhisco_to_hisco #HISCO is the European standard for occupational coding and can be used to generate HISCLASS, SOCPO and HISCAM classifications. The necessary conversion table has been made available by Mandemakers et al. and is available on: socialhistory.org/en/hsn/hsn-standardized-hisco-coded-and-classified-occupational-titles-release-201301?language=en #Occ1950 is the US standard for occupational coding.

The occupational coding system is based on the US Census of 1950 and can be transferred into OCCSCORE, PRESGL, SEI, and Nam-Powers-Boyd. Crosswalks are available on request: usa.ipums.org/usa/vols_4_5_index.shtml