Horizon 2020 : l'Etat face aux enjeux du développement durable

Le développement durable ne pourra s'établir véritablement, à un horizon temporel raisonnable, comme un nouveau cadre d'action collective qu'après un changement progressif mais profond de nos comportements et de nos modes de gouvernance. Coordonné par A. Ayong Le Kama, chef du projet Equilibres et porté notamment par les réflexions et propositions des 22 membres du Groupe projet, l'objectif de ces travaux est de mettre en lumière le rôle que pourrait et devrait jouer l'Etat stratège, sur une perspective de long terme (15-20 ans) afin de progresser vers une transformation définitive de la "contrainte" de développement durable en de véritables opportunités économiques, environnementales et sociales. Il s'agit d'évaluer les stratégies et les attentes des différents acteurs ; de les inciter à internaliser les enjeux associés au développement durable ; de faciliter le choix des actions incitatives, spécifiques à chaque type d'acteur ; d'analyser finement l'articulation des échelles de décision et d'action ; de réfléchir aux modalités d'interconnexions des politiques publiques sectorielles (santé, agriculture, transport, énergie, innovation, éducation, etc.) afin de se projeter dans le futur et d'identifier les obstacles et les leviers du changement

Growth, Environment and Uncertain Future Preferences.

The attitude of future generations towards environmental assets could be different from ours, and it is necessary to take into account explicitly this possibility in the current debate about environmental policy. The question we address here is : should uncertainty about future preferences lead to a more conservative attitude towards environment ? We show that in general it is not the case when preferences are non-separable between consumption and environmental quality. Only separable preferences, or an uncertainty about the time at which preferences could change associated with specific characteristics of the economy, could justify a more conservative attitude from now.ECONOMIC GROWTH ; ENVIRONMENT ; RISK

Sustainability and its relation to efficiency under uncertainty

Sustainability, Efficiency, Uncertainty, Policy evaluation, Portfolio choice, Q01, D81, D63, G11,

A never-decisive and anonymous criterion for optimal growth models

International audienceWe address in this paper the question of the existence of a Social Welfare Function that would be sustainable and would allow us to obtain solutions to optimal growth models. We define sustainability by two new axioms called Never-decisiveness of the present and Never-decisiveness of the future. We first show that a SWF which has Never-decisiveness properties cannot be defined on a ball of l+∞. We must (i) restrict to the set of utility streams for which the value of the SWF is finite and (ii) introduce additional assumptions in order to obtain the Never-decisiveness properties. Our main result in this paper is therefore to show that the undiscounted utilitarian criterion is an anonymous and never-decisive criterion for optimal growth models. We consider the set of utilities of consumptions which are generated by a specific technology, namely a technology with decreasing returns for high levels of capital, and restrict ourselves to good programs, i.e., any program for which intertemporal utility is well defined

Risk Management as a Tool for Sustainability

altruism, fairness, mean-variance analysis, risk, sustainability, uncertainty,