|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.
|1955 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 1955 GAF sampling frame.
General Comparability Notes
The universe listed in the ICSPR documentation for the 1955 GAF is "Currently married white women aged 18-39, living in private households, who were either living with their husbands or temporarily separated because of the husband's military service." IFSS_CS1955 is equal to 1 for currently married white women between the ages of 18 and 39, and 0 for all other women.
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_CS1955. IFSS also cannot determine whether women were living in private households; later surveys included the entire noninstitutionalized population, some of whom, such as college students living in dorms, would have been excluded from the 1955 sampling frame but cannot be separated out.