AVPR1a polymorphism & "ruthlessness"

A few months ago I blogged a paper, Individual differences in allocation of funds in the dictator game associated with length of the arginine vasopressin 1a receptor RS3 promoter region and correlation between RS3 length and hippocampal mRNA. Now these results have hit the press with really wack titles. Jake at Pure Pedantry and Joseph at Corpus Callosum offer the appropriate scientific caution. Caution is warranted, but I think the next decade at the intersection of behavioral economics & genetics is going to be very big. Papers such as Heritability of ultimatum game responder behavior & Heritability of cooperative behavior in the trust game are just the tip of the iceberg.