I will ask a weirdly specific question, since I suspect the issue appears elsewhere and the logic will generalize. In 1982 November CPS, there is a household identified by cpsid 19811100821000 which has 3 2-year-old female white individuals, each with the same lineno but a different cpsidp. Thus, the cpsidp seems to classify these as different individuals, but since they have the same lineno within the same household, I would think they are the same individual and that the original tapes erroneously included duplicates. Can you offer some guidance? It seems like an error, but the documentation for cpsidp (the Drew, Flood, Warren, 2014 JESM paper) only discusses methods from 1989 onwards, so it’s hard to be sure.