The changes on the EU gas market are likely to affect Europe's relations with its natural gas suppliers who are facing increasing competition. Heading this list of producing countries is Russia. Gas relations between Russia and the EU are characterized by strong interdependence. But these...

L'industrie pétrolière russe est depuis le début des années 1990 marquée par d'importants mouvements de réforme de son modèle organisationnel. La montée en puissance de l'Etat au sein de l'industrie est le facteur le plus souvent mentionné pour caractériser les évolutions en cours....

This paper assesses the quantitative impact of ambiguity on the historically observed financial asset returns and prices. The single agent, in a dynamic exchange economy, treats the conditional uncertainty about the consumption and dividends next period as ambiguous. We calibrate the agent's...

La sécurité gazière et les risques économiques occupent une place particulièrement importante entre l'UE et la Russie. Les relations gazières entre l'UE et la Russie ont été déstabilisées en profondeur par des changements institutionnels majeurs avec d'un coté l'effondrement de...

The Russian gas sector is undergoing significant changes which is opening the way for an original reform. Because of the particular institutional and economic context of the country, this reorganisation is not taking place along the lines of the de-integrated model of the EU. It is characterised...

This chapter of a collective book aims at presenting the basics of decision making under risk. We first define notions of risk and increasing risk and recall definitions and classifications (that are valid independently of any representation) of behavior under risk. We then review the classical...

In this chapter, we adopt the decision theoretic approach to the representation and updating of beliefs. We take up this issue and propose a reconsideration of Hammond's argument. After reviewing the argument more formally, we propose a weaker notion of dynamic consistency. We observe that this...

This paper explores risk-sharing and equilibrium in a general equilibrium set-up wherein agents are non-additive expected utility maximizers. We show that when agents have the same convex capacity, the set of Pareto-optima is independent of it and identical to the set of optima of an economy in...

We report in this paper the result of three experiments on risk, ambiguity and time attitude. The first two differed by the population considered (students vs general population) while the third one used a different protocol and concerned students and portfolio managers. We find quite a lot of...

We review recent advances in the field of decision making under uncertainty or ambiguity.