Does anyone know of a scientific article that explains how people associate themselves in political groups?

Question

Are there any studies out there that suggest that individuals who are in the same political party are more likely to associate themselves with someone in their political party compared to someone who is in a different political party?

Answer 1

http://www.academia.org/lectures/lind1.h...  http://www.reversespins.com/pcmarx.html  http://www.freeliberal.com/archives/0011...