In games with unequal equilibrium payoffs, concepts of fairness and selfishness often clash. We strucrure the approach to fairness versus selfishness as a struggle between two forces that act aon an individual's behavior.

There is reliable evidence that simple rules used by traders have some predictive value over the future momoment of foreign exchange prices. This paper will review some of this evidence and discuss the economic magnitude of this predictabiliy.

A strategy profile of a normal form game is proper if and only if it is quas-perfect in every extensive form (with that normal form). Thus, properness requires optimality along a sequency of supporting trembles, while sequentiality only requires optimality in the limit.