Revealed indifference and models of choice behavior

This paper introduces an approach to the study of rational choice behavior which is based on the concept of subjective indifference, as wen as its relationships with both the classical preference-based approach and the choice behavior approach. With regard to the first relationship (which has already been studied in Alcantud, 2001, as a purely topological and order-theoretical problem) new considerations are now put forward in the decision theory context. In short, if a decisionmaker has some indifference classes defined on a choice set, then we know the conditions under which his/her tastes can be modeled by a continuous preference yielding these indifference classes. The second problem is posed and tackled here and gives place to a theory of revealed indifference, where both the decisive, and indecisive cases win be considered. (C) 2002 Elsevier Science (USA).