The question addressed in this paper is the order of magnitude of the difference between the Borda rule and any given social choice function. In this paper, a simple measure of the difference between the Borda rule and any given social choice function is proposed. It is given by the ratio of the...

The authors investigates refinements of two solutions, the saddle and the weak saddle, defined by Shapley (1964) for two-player zero-sum games. Applied to weak tournaments, the firsy refinement, the mixed saddle, is unique and gives us a new solution, generally lying between the GETCHA and...

Given the choice sets produced by a pair of Condorcet social choice correspondence, the following intersting questions arise. Does one of these sets always contain the other? If not, do they always interest or on the contrary can they have an empty intersection? Laffond, Laslier and Le Breton...

In this paper we examine compensation schemes that prevent a threat of secession by all country's regions and in the same time provide no incentives for citizens' migration within the country. We prove that, under quite general assumptions on the distribution of citizens' preferences, there...

The main objective of this paper is to propose a model to discuss some aspects of the interaction between the environmental and trade policies. The analysis is conducted both for the socially optimal policies and the policies that would emerge from majority voting. Finally the arguments are...