What is the universe for attached characteristics of mother and father?

I am working with the 1-year ACS and attahced several characteristics of mother and father. These variables have an important number of missing values. What is the universe for characteristics of mother and father? Is there any other variable that determine if an observation includes mother and father characteristics? My sample is defined in part by age (16-24) and I would like to include in my analisys the EDUC_MOM and EDUC_POP but I want to be sure what are the observations I am not considering becuase the missing values of these two variables. Also, the missing values for any mother’s variable correspond to exactly the same individuals. Same happends with father’s variables.

Thank you.

Attached Characteristics depend on the presence of the “Attached” person in the household. So, the only special “universe” for attached characteristics of mothers and fathers is the requirement that the mother or father be present in the household. Otherwise the universe is exactly the same as the original variable. For example, if you attach EDUC_MOM, since the universe for EDUC is All Persons the only reason EDUC_MOM could be missing is if the respondent’s mother was not present in the household.

I hope this helps.

Thank you.

How does it work for individuals living in GQ? Should I expect not to find any GQ observtion with attached characteristics of mother and father?

I just confirmed it! Thank you.