Economic games and social neuroscience methods can help elucidate the psychology of parochial altruism. by Everett, J, Faber, N, Crockett, M, De Dreu, C

When helping is risky: the behavioral and neurobiological tradeoff of social and risk preferences by Gross, J, Faber, N, Kappes, A, Nussberger, A-M, Cowen, P, Browning, M, Kahane, G, Savulescu, J, Crockett, M, De Dreu, C