Hello,
Does HRHHID remain the same within a household across the Basic March survey and the ASEC? It seems like there are some values of HRHHID which are in the Basic March sample but not in the ASEC sample. Does HRHHID get generated separately in the ASEC?
The HRHHID variable is part of the original CPS household ID variable provided by the Census Bureau. The other part of the household ID is HRHHID2. These values should be consistent for the same household between the March sample and the ASEC sample. However, do note that the CPSID and CPSIDP variables are generally much easier household and person identification variables to use with IPUMS CPS.