Relevance Of Preferences Research Articles

Large group decision-making with a rough integrated asymmetric cloud model under multi-granularity linguistic environment

Large group decision-making often contains strong uncertainty and randomness due to the complexity of decision-making problems. Moreover, existing methods about large group decision-making usually assume that the relationships among decision-makers are mutually independent, which will neglect the relevance of decision information to some extent. To address these limitations, this paper proposes a novel rough integrated asymmetric cloud model to tackle large group decision-making under multi-granularity linguistic environment. This model can not only flexibly portray decision-makers’ preferences, but also objectively handle the uncertainty and randomness in large group decision-making through the relevance of preferences. Firstly, a trust propagation model based on rough integrated asymmetric cloud is raised to consider the impact of uncertainty and randomness in the trust propagation on large group decision-making. Secondly, a new asymmetric cloud distance and similarity are proposed to overcome some defects of existing methods. Thirdly, a decision-maker weight calculation method based on the Shapley function is advanced to enhance the decision-making reasonableness. Next, an investment problem is solved by the proposed method. Finally, the effectiveness and superiority of the proposed method are demonstrated by the sensitivity and comparison analyses.

Les règles monétaires génératrices de crédibilité. Eléments de critique des thèses des « nouveaux classiques »

The monetary policies debate regarding the European Monetary Union considers the "Barro-Gordon" framework as a main reference. This argues that the credibility of monetary commitments in the fight against inflation could be strengthened either by tying one's hands in the EMS or by appointing a "conservative" central banker. The paper first sets out the general coherence of these approaches, which renew the rational expectations and natural rate theory, thanks to an application of repeated games between the policymaker and the people. Then the text puts forward some criticisms and questions regarding the relevance of preferences and, more precisely, of the hypothesis of a confrontation between the policymaker, who pursues an activist policy in vain, and a private sector, considered as an entity.