Table 4:

Priority of parental links based on how clear the relationship is between the two people being linked

	IPUMS CPS		IPUMS NHIS
Direct links Parental rule value: 1−	Child	Householder	Child	Householder
	Householder	Parent	Householder	Parent
	Sibling	Parent	Sibling	Parent
			Child of partner	Partner
			Spouse	Parent-in-law
2nd level links Parental rule value: 2−	Grandchild	Child	Grandchild	Child
	Child	Spouse, partner	Parent	Grandparent
			Child	Spouse, partner
			Niece/nephew	Sibling
3rd level links Parental rule value: 3−	Housemate	Housemate	Housemate	Housemate
	Roomer	Roomer	Roomer	Roomer
	Other relative	Other relative, sibling (for years 1988 ASEC to current ASEC; 1994 to current basic monthlies)	Other relative	Other relative, aunt/uncle, niece/nephew (for years 1969-present)
	Non-relative	Partner, non-relative	Non-relative	Non-relative
	Unknown	Unknown	Unknown	Unknown
			Grandchild	Child-in-law
4th level links Parental rule value: 4−	Other relative	Child, other relative (for years ASEC 1962 −1987; 1989–1993 basic monthly samples)	Other relative	Other relative, child (for years 1963–1968)
5th level links Parental rule value: 5−	Other relative	Other relative, householder, spouse (years basic monthly samples 1976 to 1988)