@article { domingos20, journal = {iScience (in press)}, keywords = {Game Theory;Multi-Agent Societies;Social Robotic Companions;}, number = {12}, pages = {101752 }, publisher = {Cell Press}, title = {Timing uncertainty in collective risk dilemmas encourages group reciprocation and polarization}, volume = {23}, year = {2020}, author = {Elias Fernandez Domingos and Jelena Grujic and Juan C. Burguillo and Georg Kirchsteiger and Francisco C. Santos and Tom Lenaerts} }