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.
Sample Generated Data for Four Risk Difference Scenarios (Simulation 1) with No Treatment Effect. Each Line Represents the Simulated Cluster-Level Outcome for One Cluster over Eight Time Periods. Black Lines Represent Clusters with Time Effects θ = θ1 and Gray Lines Represent Clusters with Time Effects θ = θ2.
