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Enter, therefore, a new and ingenious variant of Ultimatum, this one called Dictator. Once again, a small pool of money is divided between two people. But in this case, only one person gets to make a decision. (Thus the name: the “dictator” is the only player who matters.) The original Dictator experiment went like this. Annika was given $20 and told she could split the money with some anonymous Zelda in one of two ways: (1) right down the middle, with each person getting $10; or (2) with Annika keeping $18 and giving Zelda just $2. Dictator was brilliant in its simplicity. As a one-shot game between two anonymous parties, it seemed to strip out all the complicating factors of real-world altruism. Generosity could not be rewarded, nor could selfishness be punished, because the second player (the one who wasn’t the dictator) had no recourse to punish the dictator if the dictator acted selfishly. The anonymity, meanwhile, eliminated whatever personal feeling the donor might have for the recipient. The typical American, for instance, is bound to feel different toward the victims of Hurricane Katrina than the victims of a Chinese earthquake or an African drought. She is also likely to feel different about a hurricane victim and an AIDS victim. So the Dictator game seemed to go straight to the core of our altruistic impulse. How would you play it? Imagine that you’re the dictator, faced with the choice of giving away half of your $20 or giving just $2. The odds are you would . . . divide the money evenly. That’s what three of every four participants did in the first Dictator experiments. Amazing! Dictator and Ultimatum yielded such compelling results that the games soon caught fire in the academic community. They were conducted hundreds of times in myriad versions and settings, by economists as well as psychologists, sociologists, and anthropologists. In a landmark study published in book form as Foundations of Human Sociality, a group of preeminent scholars traveled the world to test altruism in fifteen small-scale societies, including Tanzanian hunter-gatherers, the Ache Indians of Paraguay, and Mongols and Kazakhs in western Mongolia. As it turns out, it didn’t matter if the experiment was run in western Mongolia or the South Side of Chicago: people gave. By now the game was usually configured so that the dictator could give any amount (from $0 to $20), rather than being limited to the original two options ($2 or $10). Under this construct, people gave on average about $4, or 20 percent of their money. The message couldn’t have been much clearer: human beings indeed seemed to be hardwired for altruism. Not only was this conclusion uplifting—at the very least, it seemed to indicate that Kitty Genovese’s neighbors were nothing but a nasty anomaly—but it rocked the very foundation of traditional economics. “Over the past decade,” Foundations of Human Sociality claimed, “research in experimental economics has emphatically falsified the textbook representation of Homo economicus.
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Steven D. Levitt (SuperFreakonomics, Illustrated edition: Global Cooling, Patriotic Prostitutes, and Why Suicide Bombers Should Buy Life Insurance)