Fig. 1.
Estimated treatment effects according to simulations in the first model as well as in a model with increased heterogeneity, obtained according to steps 1–4. The average effect is indicated by a dashed line
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.