[eng] In this paper which deals with global environmental problems, we use an evo­lutionary approach in order to determine the conditions under which O.E.C.D countries are led to reduce unilaterally their pollution emissions. Thus we remark that a country's choice of a unilateral reduction...

This paper examines the existence of Berge equilibrium. Colman et al. provide a theorem on the existence of this type of equilibrium in the paper [Colman, A. M., Körner, T. W., Musy, O. and Tazdaït, T. [2011] Mutual support in games: Some properties of Berge equilibria, J. Math. Psychol. 55,...