Different cultures respond differently to the Ultimatum Game. Be wary of those studies that only use "Anglo-Saxon American College Kids" as test subjects, which is a group of people that isn't even representative of America in general.
http://bigthink.com/praxis/are-americans-the-weirdest-people...
>>> The revelation that rural Peruvians handle the ultimatum game so differently from American respondents led Henrich on a MacArthur Foundation-funded research trip to more than a dozen more locales around the world, where he found wide variation in the average offers of player #1 and this curious result: “in some societies — ones where gift-giving is heavily used to curry favor or gain allegiance — the first player would often make overly generous offers in excess of 60 percent, and the second player would often reject them, behaviors almost never observed among Americans.”
