|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.
|1976 NSFG comparable sample|
|1976 NSFG: Couple File|
|RESPID||N/A||1976 NSFG: Couple File|
|This variable indicates whether the respondent would have been included in the 1976 NSFG sampling frame.
General Comparability Notes
|The universe listed in the ICSPR documentation for the 1976 NSFG is "Women living in the coterminous United States, aged 15-44 years inclusive, who were either currently married, previously married, or never married but had offspring presently living in the household." IFSS_CS1976 is equal to 1 for all ever-married women between the ages of 14 and 45; the age range differs slightly because there were women included in the sample who were 14 and 45 at the time of the survey. IFSS_CS1976 is also equal to 1 for never-married women between the ages of 14 and 45 who report having biological children in the household at the time of the survey. IFSS does not include never-married women with adopted children in this sample. Women who do not meet either of the criteria (ever-married or biological children in household) have a value of 0 for IFSS_CS_1976. IFSS cannot determine respondentsí state of residence in any component survey and thus cannot determine if women were living in the coterminous U.S. IFSS_CS1976 is therefore functionally identical to IFSS_CS1973 and is provided for completeness only.|