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.
The basic household model used in this paper. There are three levels to this model: (a) the individual level, (b) the within-household level where there is strong mixing, and (c) the population level in which there is weaker mixing and a distribution of household sizes.
