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.
Environmental and genetic variance components. Worldwide parameter estimates for additive genetic factors (A), shared environments (C), and unique environments (E), for each year (2015–2019), taking into account unequal population sizes across countries and regional differences within countries.
