Some would say that it fills a psychological need that other companies have not had to do in quite the same way.

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In Arizona, it is legal for a person to walk up to another on a street corner, hand him cash for a firearm and simply walk off with it, with no need for a background check into his psychological or criminal history.

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"As the service members return home and as the wars wind down, the mental trauma of war remains and there is an urgent need to make sure every service member receives a psychological evaluation upon returning home, and whenever a service member reaches out for help, the service member needs to receive it immediately, " he said.

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However, Britney is said to have a psychological condition, such as bipolar disorder, that justifies the continued need for conservatorship.

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While such a causal relationship makes intuitive sense, at least to me, policymakers and businesses need a methodologically rigorous demonstration of such a link between psychological well-being and income before that link should influence decision making.

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But they do need a certain level of knowledge and skill in order to have a proper appreciation of the technical and psychological issues facing the person they are mentoring.

ECONOMIST: Idea