“Information about union membership was collected in the ASEC CPS beginning in 1983, as part of a series of questions about usual weekly and hourly earnings. The Census Bureau reports that the results in the ASEC CPS public use files for this data series included errors for years prior to 1990, so for the March ASEC supplements only data from 1990 forward are part of IPUMS-CPS.”
Is there any other kind of union information available from IPUMS-CPS that I’m missing prior to 1990? Would the NBER MORGS have this data, or would it include the same errors cited by the census and therefore shouldn’t be used?