Ontology highlight
ABSTRACT:
SUBMITTER: Ogihara Y
PROVIDER: S-EPMC8712929 | biostudies-literature | 2021
REPOSITORIES: biostudies-literature
Frontiers in big data 20211214
Currently, a social security number (SSN) is held by almost every legal resident of the United States and works as an important numbering system. However, this was not the case in the early years of the Social Security program and historical changes in SSN holder rates had not been examined sufficiently. It is important to understand the changes in health policies and situations. Thus, the present article examined historical changes in the rates of SSN holders in the United States between 1909 a ...[more]