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| Variable Name | birthdate |
| Top Access Level | released |
| Label | Date of Birth |
| Codebook | SIPP Synthetic Beta v7 |
| Concept | |
| Type | numeric |
Files
ssb_v7_0_syntheticK_M.sas7bdat
http://www.census.gov/programs-surveys/sipp/methodology/sipp-synthetic-beta-data-product.html
(
SAS
)
ssb_v7_0_syntheticK_M.dta
http://www.census.gov/programs-surveys/sipp/methodology/sipp-synthetic-beta-data-product.html
(
Stata
)
Full Description
This variable was taken from a hierarchy of SSA sources instead of the respondent-provided
value in the SIPP. Date of birth was selected from the first non-missing value in
the following files: (i) SSA's Master Benefits Record (MBR) file, (ii) SSA's Supplemental
Security Record (SSR) file, and (iii) the Census Bureau's Person Characteristic File
(PCF) whose main input is the SSA Numident file. Thus, this variable is administrative
and sometimes differs from the birth date reported in the SIPP survey itself. When
missing due to the lack of a validated SSN for the SIPP respondent, date of birth
was imputed using date of birth from the Census-internal version of the SIPP as a
predictor variable. We chose the administrative source for two reasons. First, the
administrative birth date was more consistent with the MBR and DER data and provided
more accurate ages for first OASDI benefit receipt and first W-2 or self-employment
earnings. Second, the differences between the administrative birth date and the birth
date reported in the survey helped to increase the difficulty of re-identifying a
record in the original SIPP public use data using information from a record in the
synthetic data, thus improving the confidentiality protections. This variable is coded
as a SAS date variable. This format gives the number of days between the date of birth
and January 1, 1960. An individual born on January 1, 1959 would have birthdate=-365
and an individual born on January 1, 1961 would have birthdate=365.
Groups
