Table 2: Linkage variables in 1960–1990 censuses and the administrative records composite file.

	Decennial censuses short forms 1970–1990	Decennial censuses long forms 1960–1990	Administrative records composite
Universe	all U.S. residents	16–25% sample of U.S. residents	Varies by field
Name	x	x	x
Age/Year of Birth	x	x	x
Quarter of birth		1960-1980	x
Sex	x	x	x
Marital Status	x	x	x
State or country of birth		x	x
Parents’ names	X*	X*	x
Street address	1990	1990	x
Census Tract	x	x	x
County	x	x	x
SSN/PIK			x

*available for respondents living with parents.