We 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....

[fre] L’objectif de ce travail est l’étude du traitement optimal des déchets nucléaires. Nous analysons la politique d’enfouissement des déchets radioactifs en prenant en considération un risque futur de déstockage accidentel des déchets préalablement enfouis. Nous montrons que,...

We consider an optimal consumption and pollution problem that has two important features. Environmental damages due to economic activities may be irreversible and the level at which the degradation becomes irreversible is unknown. Particular attention is paid to the situation where agents are...

The purpose of this paper is to show that not taking into account clearing costs does not allow to describe correctly the cultivated land dynamics when food demand would require to devote to agriculture an increasing fraction of available land. We also show that the validity of the conclusions...