Rational Evaluation of Actions Under Complete Uncertainty

This work analyzes the problem of individual choice of ac- tions under complete uncertainty. In this context, each action consists of a set of dierent possible outcomes with no probability distribution as- sociated with them. The work examines and denes a class of choice pro- cedures in which: a): the evaluation of sets (actions) is element-induced; and b): certain assumption of rationality, which is an adaptation of Sen's condition, is satised. Some results of characterization show that dif- ferent well-known rules can be reinterpreted as particular cases within the dened class, each of them responding to dierent attitudes towards uncertainty by the agen