Este artigo visa a sistematizar as críticas que Amartya Sen dirige à estrutura teórica adotada por Arrow e a mostrar como, para fugir aos resultados devastadores do teorema da Impossibilidade, Sen defende a ampliação do universo de informações a serem utilizadas para embasar a escolha...

In his early years, B S Minhas, who passed away recently, enriched economics with his valued theoretical contributions that are today an integral part of economic literature. These were both acknowledged and challenged by the giants of economics at that time. On his return to India, realising...

During research seminars, it hardly ever happened that Gerard Debreu posed a question—and if he did, not without already knowing the answer. While some admired him for the tranquility of his austere rigor, others wondered how little he had to say in economics. To whatever effect, Debreu...

Kenneth Arrow est un économiste américain connu pour avoir analysé mathématiquement à quelle condition un marché concurrentiel est un optimum (dans un article écrit en 1954 avec Gérard Debreu dans la revue Econometrica). C’est le fameux modèle « Arrow-Debreu ». Arrow a reçu le prix...

Antonio Quesada (Public Choice 130:395–400, <CitationRef CitationID="CR4">2007</CitationRef>) argues that a dictator has no more than two to three times the ‘average power’ of a non-dictatorial voter. If Quesada is correct, then his argument has major consequences for social choice theory; for instance, it warrants reconsidering the...</citationref>

Albert Heckscher (1857–1897) was a Danish lawyer. In his dissertation (Bidrag till Grundlæggelse af en Afstemningslære), accepted in 1892 at the University of Copenhagen, Heckscher dealt with numerous issues related to voting, especially those related to vote-aggregation in parliaments,...

Social choice theory predicts that political processes are prone to instability or outright chaos, yet the evidence that actual politics is dominated by the phenomena identified in the literature is somewhat anecdotal and widely contested. In order to systematically assess the degree to which...

Condorcet’s paradox occurs when there is no alternative that beats every other alternative by majority. The paradox may pose real problems to democratic decision making such as decision deadlocks and democratic paralysis. However, its relevance has been discussed again and again since the...