I'm looking at the children information of the first wave individual data. But I'm a bit confuse. There are three variables: "a_nnatch"--number of biological children in household, "a_nadoptch"--number of adoptive children in household, and "a_nchild_dv" number of own children in household. I find that "a_nchild_dv" is not equal to "a_nnatch" or "a_nnatch" + "a_nadoptch".
I've searched the questionnaire, there is no information about "a_nchild_dv". What's this variable means?
And could you tell me, if I want to get how many children (no matter biological or adoptive)are living with the respondents in household, which variable(s) I need to look at (is it "a_nnatch" + "a_nadoptch")? And in which dataset or variable I can get the age of the children who living with the respondents?