Admittedly, this question is only tangentially related to PFO, but this is really the best place to ask about it.
I have seen and heard a number of things about MMO game design, questions that fall within the realms of social psychology, economics, ecology, etc. I'm curious how common it is for game companies to hire professionals in these fields to assist in the design process.
I'll be going into an economics PhD program next fall, and I'm wondering if I will have employment opportunities in areas I hadn't considered. ;)