Gordon Gekko’s cry, “Greed is good,” seems to have become a shopworn motto.  But in fact some measure of greed is always driving Wall Street. And if you dig deeper you come up to the root cause of that impulse, says writer Tony Schwartz. “Greed begins in the neurochemistry of the brain. What fuels our greed is a neurotransmitter called dopamine. The higher the dopamine levels in the brain, the more pleasure we experience. Cocaine, for example, directly increases dopamine levels.” Read his article at http://huff.to/bpG0Dq

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