The Condorcet winner in an election is the candidate who would be able to defeat all other candidates in a series of pairwise elections. The Condorcet efficiency of a voting procedure is the conditional probability that it will elect the Condorcet winner, given that a Condorcet winner exists....

We consider in the present paper an original approach to a decision making problem related to the management of a primary resource, namely the rubber tree. By using the social choice theory through the approval voting, we show that it is possible to improve the return of the crop. Hence, by...

Consider a group of individuals who have to collectively choose an outcome from a finite set of feasible alternatives. A scoring or positional rule is an aggregation procedure where each voter awards a given number of points, wj, to the alternative she ranks in jth position in her preference...