We examine how moral sanctions and rewards, notably the moral sentiments involving feelings of guilt and virtue, would be employed to govern individuals' behavior if the objective were to maximize social welfare. In our model, we analyze how the optimal use of guilt and virtue is influenced by...

The conflict between pro-self and pro-social behaviour is at the core of many key problems of our time, as, for example, the reduction of air pollution and the redistribution of scarce resources. For the well-being of our societies, it is thus crucial to find mechanisms to promote pro-social...

Within a standard stochastic evolutionary framework, we study the evolution of morality, both at the level of behavior and at the level of codes of behavior. These moral codes involve sanctioning deviant agents. We provide conditions under which the presence of any small degree of inter-group...

Security breaches of digital information represent a significant threat to the wellbeing of individuals, corporations, and governments in the digital era. Roughly 50% of breaches of information security result from the actions of individuals inside organizations (i.e., insider threat), and some...

With respect to questions of fact, people use heuristics - mental short-cuts, or rules of thumb, that generally work well, but that also lead to systematic errors. People use moral heuristics too - moral short-cuts, or rules of thumb, that lead to mistaken and even absurd moral judgments. These...

I distinguish four types of goals: self-interested, altruistic, moralistic, and moral. Moralistic goals are those that people attempt to impose on others, regardless of the others' true interests. These may become prominent in political behavior such as voting because such behavior has...