Fig. 3.
A directed social network of U.S. high school students and the division into two groups found by the directed version of our method. Vertex shapes show the (self-identified) ethnicity of the students, as indicated.
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.