Our recent fMRI study of brain activity in cooperative economic games is featured on the Economics and Social Research Council website this week:
http://www.esrc.ac.uk/impacts-and-findings/features-casestudies/features/20627/fear-makes-us-co-operate.aspx 

The research aimed at understanding the neural, cognitive and emotional processes via which social conventions and norms develop in societies. lThe abstract of the full paper published earlier this year in the Journal of Neuroscience Psychology and Economics is available here: http://psycnet.apa.org/journals/npe/5/1/1/