Arrow (1963) established that a group cannot always reach logically consistent collective outcome. Subsequently many developments like premise based, conclusion based and distance based methods have emerged in literature to reach group consistency. This study is focused on the judgment aggregation in fuzzy logic based setting with novel involvement of…

The aim of this article is to present in a formal way the concept of the experton, which is commonly used in practice, and use this formalization to justify its properties and the equivalence between the concept of mathematical expectation of an experton and the expectation of expressed opinions. The…

This paper analyzes the informational efficiency of oil market during the last three decades, and examines changes in informational efficiency with major geopolitical events, such as terrorist attacks, financial crisis and other important events. The series under study is the daily prices of West Texas Intermediate (WTI) in USD/BBL, commonly…

The aim of this paper is to present a new approach to the representation and elaboration of fuzzy causal reasoning. The proposed approach is based on some results obtained by several studies on causal explanation in the field of cognitive sciences. Drawing form such results, we present a fuzzy linguistic…