TY - CHAP AU - Cutello, V. AU - Montero, Javier PY - 1995 DO - 10.1007/978-1-4615-2357-4_7 SN - 0-7923-9586-7 UR - https://hdl.handle.net/20.500.14352/60915 AB - In this paper we survey on aggregation operators and in particular hierarchies of them. As a case study, we will analyze the problems of the aggregation of truth values of fuzzy predicates and the aggregation of individual opinions into a single group... LA - eng M2 - 175 PB - Kluwer Academic KW - Aggregations rules KW - Fuzzy preferences KW - Group decision making TI - Information and aggregation: ethical and computational issues TY - book part ER -