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One is deontic reasoning: the ability to recognize and understand social rules and what happens when the rules are transgressed.

They refer, in fact, to the so-called “deontic model of justice,” which holds that people are motivated toward fairness and doing the right thing out of a sense of moral obligation as an end unto itself, i.e., simply because it’s fair and/or the right thing to do.

It has to do with their deontic logic, or personal moral beliefs about how people should be treated, says Christine Porath, a management professor at Georgetown University and co-author of the study.

Interestingly, theorists on morality have developed something called �deontic logic�, which appears to give many similar results as economic theory.

Deontic logic however applies to propositions and not to commodity domains.