Combinatorial optimization and game theory.
K. Kollias and T. Roughgarden. Restoring pure equilibria to weighted congestion games. ICALP 2011.
R. Bhattacharjee, A. Goel, and K. Kollias. An incentive-based architecture for social recommendations. RecSys 2009.
K. Kollias. Nonpreemptive coordination mechanisms for identical machine scheduling games. SIROCCO 2008.