The main related conference in computer science is ACM EC, with work also appearing at the main AI conferences (AAAI, IJCAI, and AAMAS) and theory conferences (STOC, FOCS and SODA). New venues include WINE, SAGT and COMSOC.
Research at Harvard
The EconCS research group is active in this area and hosts weekly talks. The Center for Research on Computation and Society (CRCS) has a current focus on Economics and Computer Science and will be hosting related talks. The Artificial Intelligence Research Group (AIRG) is very active in the related field of multi-agent systems.