Titel: Non-deteriorating Choice without Full Transitivity
Autor: Walter Bossert / Kotaro Suzumura
Abstract: Although the theory of greatest-element rationalizability and maximal-element rationalizability on general domains and without full transitivity of rationalizing relations is well-developed in the literature, these standard notions of rational choice are often considered to be too demanding. An alternative definition of rationality of choice is that of non-deteriorating choice, which requires that the chosen alternatives must be judged at least as good as a reference alternative. In game theory, this definition is well-known under the name of individual rationality when the reference alternative is construed to be the status quo. This alternative form of rationality of individual and social choice is characterized inthispaperongeneraldomainsandwithout full transitivity of rationalizing relations.
Titel: Welfare, Rights, and Social Choice Procedure: A Perspective
Autor: Kotaro Suzumura
Abstract: Sen's "The Impossibility of a Paretian Liberal" was meant to crystallize his fundamental criticism against the welfaristic basis of welfare economics in general, and social choice theory in particular. This paper vindicates Sen's criticism, arguing that its logical relevance is not lost in light of recent criticisms against his method of articulating individual rights in terms of a person's decisive power in social choice. We show that some recent proposals that Sen's articulation failed to capture a strong libertarian tradition of free contract and that an appropriate formulation of this tradition wipes off the Sen impossibility cannot be sustained. We then show that the game form articulation of rights casts serious doubts on the Sen articulation of liberty, but the Sen impossibility strenuously comes back in the context of realizing conferred game form rights as well as in the context of initial conferment of game form rights.
Perspectives on Social Choice
2007 (29) Heft 2
Guest-Editor: Marlies Ahlert
Introduction and Overview
This volume of Analyse & Kritik approaches social choice from different angles. Each of the papers thematically has some relation with the work of Wulf Gaertner. This provides some topical unity to the volume. However, other than in case of a typical Festschrift the refereed papers are in all other regards independent contributions to the field of social choice as very widely understood. Methods reach from axiomatic analyses over experiments to simulations and from t...