In the Ultimatum Game, years of experience has shown me that most accepters will invariably reject any offer that is less than half of the proposer’s money. Once you get to a quarter of the proposer’s money you can forget it and the accepters are insulted. Most people make an irrational choice to let the dollar slip through their fingers rather than to accept a derisory offer, because the negative emotional value of unfairness outweighs the positive rational value of the money.