Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Notes: The project starts with G2 birth certificates to construct the intergenerational and longitudinal data. The figure shows the approximate distribution of birth years for each generation. Generations have overlapping birth years.
