The paper is a brief account of Georges-Théodule Guilbaud?s (1912-2006) contributions to contemporary aggregative theories. An unnoticed precursor, Guilbaud anticipated on the algebraic conception of aggregation and on the more recent judgment aggregation theory, which generalizes social...

This note critically discusses the justification of Paretian welfare economics that Wolfelsperger has offered by relying on philosophical liberalism. Classification JEL : A13, D 60

The paper revisits the rationality principle from the particular perspective of the unity of social sciences. It has been argued that the principle was the unique law of the social sciences and that accordingly there are no deep differences between them (Popper). It has also been argued that the...

This essay aims at first reconsidering the « axiomatic method », and then showing how it is implemented in Debreu?' s general equilibrium theory, von Neumann and Morgenstern?'s theory of decision, and Arrow?'s, Nash?'s and their followers?' contributions to normative economics. We separate an...