Relying on your answer to the questions referenced above, I have attempted to merge IPUMS variables relating to the HIU to the CPS data (not NBER version - variable names as specified by Census) after sorting by serial number and person number (IPUMS) and HSEQ and PPPOS (CPS). I used the person weight to validate the merge and found that the match does not work correctly, starting with HSEQ=350 (record number 479).
Since the sum of the weights and the total number of records in the two files matches, the sort to assign serial numbers in the NBER/ IPUMS file must be on a variable other than HSEQ.
Given that I can’t merge the data, is there a data dictionary that can explain the code you provide for creating the HIUD variable by mapping the IPUMS variables to the code book for CPS? Thank you in advance.