José Luis García Lapresta (Universidad de Valladolid)

Abstract:
In this contribution, we extend preference-approvals to a more general situation, where voters can sort the alternatives in three disjoint classes instead of two (for instance, acceptable, neutral and unacceptable). We propose a parameterized family of voting systems related to the Borda count, where positive (negative) decreasing individual scores are assigned to acceptable (unacceptable) alternatives, and neutral alternatives obtain null scores.