In a multiperiod economy with incomplete markets and assets that exhibit a payoff depending on price history, we show that one need not perturb back office and settlement feature of assets to get endowment generic existence of an equilibrium. We exhibit a class of assets -transverse assets - and...

This paper investigate the existence of asymmetric equilibria in a pure exchange economy with individual risks. The model is an extension of Malinvaud's (1973). Agents face identical pure individual risks: their endowments and utility functions only depend on their individual state; but there...

We study a class of exchange economies where the characteristics of the agent are fixed but the initial endowments. We define a notion of regular economies which encompasses the different approach of the literature. We then prove that a regular exchange economy has a finite odd number of...

The set of equilibrium prices in linear exchange economies is by Mertens (1996) a convex polyhedral cone (after adding {0}). We give a constructive proof of this fact. From this, we derive a lower semi-continuity property of the equilibrium price correspondence. The set of equilibrium...

Cet article se propose d'etudier les proprietes d'un modele d'equilibre general en presence de risque purement microeconomique lorsque les agents se comportent selon le modele d'utilite esperee au sens de Choquet (Choquet Expected Utility), ie., ils maximisent une esperance non-additive d'utilite.

A hierarchic price is a finite ordered family of price vectors {p1,...,pk}. It extends the notion of exchange values proposed by Gay (1978). These price notions were introduced in order to establish the existence of a competitive equilibrium without the strong survival assumption. It is well...

We give a simple example to the non-existence of duopoly equilibrium in pure strategies in an economy with two goods and two types of consumers.

Inspite of wide and lond-standing support among economists for indexation of loan contracts there has been relatively little use of indexation, except in situations of extremely high inflation. The object of this paper is to provide a (theoretical) explanation for this puzzling phenomenon based...

Clarke's normal cone appears as the right tool to define the marginal pricing rule in finite dimensional commodity space since it allows to consider in the same framework convex, smooth as well as nonsmooth nonconvex production sets. Furthermore it has nice continuity and convexity properties....

Without a survival assumption, a Walras equilibrium may not exist in the Arrow-Debreu model. The quasi equilibrium is an auxiliary equilibrium concept which exists without the survival assumption. Several notions of irreducibility were introduced in the literature in order to allow for weakening...