In the 1940 full count data, there appears to be no unique mapping between OCC1950 and OCC and UOCC variables. In particular, for some (U)OCC values there exists various values of OCC1950. So, based on the data, I don’t seem to be able to allocate individuals to OCC1950 categories.
How is the value for OCC1950 determined in these cases? After reading https://usa.ipums.org/usa/chapter4/ch… I am not sure how to answer this question. Is there a key to uniquely map the two occupational variables?