Summary for Variable Group: Comparable sample
The Comparable sample variable group contains ten binary variables (one for each component survey) to allow users to generate samples that are consistent across time. With few exceptions, the sampling frames become more inclusive over time, with the earliest surveys having the most restrictive sample. Comparable sample ("CS") variables are equal to 1 if the respondent would have been included in the sample in that year. For example, a sample that is consistent with the 1955 GAF would include only those respondents who would have been included in a survey using the sample restrictions for the 1955 GAF, i.e., those for whom IFSS_CS1955=1. A consistent sample spanning multiple surveys would include only those respondents with a value of 1 for the comparable sample variable for each survey. For example, a consistent sample from 1965 to 1976 would contain only respondents for whom IFSS_CS1965=1, IFSS_CS1970=1, IFSS_CS1973=1 and IFSS_CS1976=1.
1960 GAF comparable sample
|1976 NSFG: Couple File|
|R7_CM||R7||1976 NSFG: Couple File|
|MARSTAT||N/A||1976 NSFG: Couple File|
|F1||F1||1976 NSFG: Couple File|
|A7_CM||A7||1976 NSFG: Couple File|
|PER_RACE||CM244, PM353||1970 NFS|
|This variable indicates whether the respondent would have been included in the 1960 GAF sampling frame.
General Comparability Notes
The universe listed in the ICSPR documentation for the 1960 GAF is "(1) currently married White women aged 18-44, living in private households, who were either living with their husbands or temporarily separated because of their husband's military service, (2) previously married White women aged 23-44, who were married and living with their husband in 1960 (except for temporary separation due to military service), and (3) currently married non-White women aged 18-39, living with their husband (except for temporary separation due to military service)."
IFSS_CS1960 is equal to 1 for currently married white women between the ages of 18 and 44, and currently married black women between the ages of 18 and 39; IFSS_CS1960 is equal to 0 for all other women. Although some previously married women were eligible to be sampled in the 1960 GAF, previously married women are not included in the comparable sample universe. Previously married women are excluded from the comparable sample because, although they were eligible in 1960, no women actually sampled report being post-married (divorced/widowed), probably because they had to have been living with their husband in 1960 to be included; point (2) therefore must have applied retroactively rather than concurrently. Additionally, all non-white women in 1960 reported their race as black, so only black women are included in IFSS_CS1960. Because the reporting patterns of race have changed over time, there are likely some women in later surveys who do not classify themselves as black but who would have been classified as black in 1960.
IFSS cannot determine which women were living with their husbands, though in later years respondents could list their marital status as "separated;" those women are not included in IFSS_CS1960. IFSS also cannot determine whether women were living in private households; later surveys included the entire noninstitutionalized population, some of whom would have been excluded from the 1960 sampling frame but cannot be separated out.