@inproceedings { pacheco11, address = {Eindhoven, The Netherlands}, booktitle = {in Advances in Artificial Life, ECAL 2011: Proceedings of the Eleventh European Conference on the Synthesis and Simulation of Living Systems,}, keywords = {Game Theory;Multi-Agent Societies;}, month = {September}, publisher = {MIT press}, title = {Evolutionary dynamics of collective action}, year = {2011}, author = {Jorge M. Pacheco and Francisco C. Santos and Max O Souza and Brian Skyrms} }