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Quelle est ou quelles sont les propositions vraies?a.Une allocation optimale au sens de Pareto est une allocation de biens qui maximise la richesse pour tousb.Il y a optimum de Pareto dès que les firmes maximisent leurs profits.c.A l'optimum de Pareto, il est encore possible d'améliorer le bien être d'un agent sans détériorer celui d'un autre agent.d.L'optimum de Pareto engendre une perte sèchee.Aucune de ces propositions est vraie

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