Contemporary approaches to decision making describe a decision problem by sets of states and outcomes, and a rich set of acts: functions from states to outcomes over which the decision maker (DM) has preferences. Real problems do not come so equipped. It is often unclear what the state and...

Contemporary approaches to decision making describe a decision problem by sets of states and outcomes, and a rich set of acts: functions from states to outcomes over which the decision maker (DM) has preferences. Real problems do not come so equipped. It is often unclear what the state and...

We use a model of psychological-games-played-on-a-network to demonstrate a role for endogenously determined, rationally chosen ethics. Our analysis produces sharp results about the contagion of non-ethical or ethical behavior and about the possible stable configurations of each type of behavior....