I am using the MTUS-X files to get comparable estimates across US data (1975, 1998, 2003-2018), rather than using AHTUS-X and ATUS-X.
The variable for “number of children under 18” (NCHILD) states that it may not be limited to own children. However, I am interested in constructing a sample of mothers with an own household child.
Is it possible to use the US MTUS data to discern whether these children are own children? Or, is it possible to use the AHTUS data for 1975 and 1998 to find out whether UNDER18 refers to an own child? This does seem to be possible using ATUS-X for years 2003-2018 (KIDUND18), but I am not sure if that variable is available in earlier years.
Thank you very much!