Standard economic theory assumes that humans behave fully rationally and are able to objectively calculate the value (or cost) of the different choices they are presented with. In fact, we pride ourselves on our rationality. Different from the animals, we humans have the unique capacity for logical thought and rational decision making. Or do we? According to behavioral economist Dan Ariely, we should be less proud of ourselves. In his entertaining book Predictably Irrational, Ariely...
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