|Data Dictionary:||ACS 2008 (3-Year Estimates)|
|Data Source:||U.S. Census Bureau|
Universe: Universe: Population 15 to 54 years
|Excerpt from:||Social Explorer; U.S. Census Bureau; American Community Survey 2006-2008 Summary File: Technical Documentation.|
|ACS 2008-3yr Summary File: Technical Documentation -> Appendix B: Subject Definitions -> Population Variables -> Marital Status/Marital History -> Median Age at First Marriage|
The median age at first marriage is calculated indirectly by estimating the proportion of young people who will marry during their lifetime, calculating one-half of this proportion, and determining the age (at the time of the survey) of people at this half-way mark by osculatory interpolation. It does not represent the actual median age of the population who married during the calendar year. It is shown to the nearest tenth of a year. Henry S. Shryock and Jacob S. Siegel outline the osculatory procedure in Methods and Materials of Demography, First Edition (May 1973), Volume 1, pages 291-296.