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.
Halpern-Manners A, Warren JR.Halpern-Manners A, et al. Among authors: warren jr.Demography. 2012 Nov;49(4):1499-519. doi: 10.1007/s13524-012-0124-x.Demography. 2012.PMID: 22893185Free PMC article.
Roberts E, Warren JR.Roberts E, et al. Among authors: warren jr.Hist Fam. 2017;22(2-3):258-290. doi: 10.1080/1081602X.2016.1224729. Epub 2016 Oct 21.Hist Fam. 2017.PMID: 28943749Free PMC article.
Warren JR.Warren JR.Ann Am Acad Pol Soc Sci. 2016 Jan 1;663(1):292-330. doi: 10.1177/0002716215596981. Epub 2015 Dec 10.Ann Am Acad Pol Soc Sci. 2016.PMID: 33828328Free PMC article.