Definition
This is a constructed variable that indicates whether the person's mother lived in the same household and, if so, gives the person number of the mother (US50A400). Since the 1850 U.S. census did not collect the explicit family interrelationship information, this variable contains information that is documented in the imputed location of mother (US50A406) variable description.
The method by which probable child-mother links are identified is described in US50A405; see also "Family Interrelationships" for discussion of NAPP constructed variables.