Interesting article about buying behavior.

“We evolved as social primates who hardly ever encountered strangers in prehistory,” Dr. Miller says. “So we instinctively treat all strangers as if they’re potential mates or friends or enemies. But your happiness and survival today don’t depend on your relationships with strangers. It doesn’t matter whether you get a nanosecond of deference from a shopkeeper or a stranger in an airport.”

http://www.nytimes.com/2009/05/19/science/19tier.html?em

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