I examine oligopolistic competition for time inconsistent consumers. The two cases of investment (health clubs) and leisure goods (credit cards) have different implications for strategy. For leisure goods the firms offer introductory rates at the fully rational consumer level, but consumers end up paying higher fixed rates later. In the limit, the markups go to zero. For investment goods there ...

We consider extensions of some classical rational axioms introduced in conventional choice theory to valued preference relations. The concept of kernel is revisited using two ways: one proposes to determine kernels with a degree of qualification and the other presents a fuzzy kernel where every element of the support belongs to the rational choice set with a membership degree. Links between the...

In this paper, two sets of sufficient conditions are obtained to ensure the existence and stability of a unique equilibrium point of unforced first-order fuzzy relational dynamical systems by using two different approaches which are both based on the fuzzy relational matrix of the model.In the first approach, the equilibrium point of the system is one of the centers of the related membership fu...