I need to create a crosswalk between the variable OCC1950 and the “original” occupational codes of the 1900 Census (“original” 1900 Census codes available f.e. here: http://www.hist.umn.edu/~rmccaa/ipums-europe/usa/volii/90occup.html and used in Preston, S. H., & Haines, M. R. (1991). Fatal years: child mortality in late nineteenth-century America).
However, the variable OCC in 1900 currently uses the 1880 Occupation codes (see https://usa.ipums.org/usa-action/variables/OCC#codes_section) so I do not see an immediate solution to the problem.
Is a crosswalk between the 1900 “original” occupational codes and the IPUMS OCC1950 variable available somewhere?