An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Thomson E, Winkler-Dworak M, Beaujouan É.Thomson E, et al.Demography. 2019 Dec;56(6):2063-2082. doi: 10.1007/s13524-019-00823-0.Demography. 2019.PMID: 31713128Free PMC article.