Public Choice Society
This society describes itself as follows: "Its goal is to
facilitate the exchange of work, and ideas, at the intersection
between economics, political science, and sociology. It started
when scholars from all three of these groups became interested
in the application of essentially economic methods to problems
normally dealt with by political theorists." At this site you
can read about the journal they are loosely associate with, "Public
Choice," their annual meeting, and their current and past presidents.
http://www.pubchoicesoc.org/