Ara es mostren els items 1-20 de 97

    • A characterization of weighted simple games based on pseudoweightings 

      Freixas Bosch, Josep (2020-09-14)
      Article
      Accés obert
      The paper provides a new characterization of weighted games within the class of simple games. It is based on a stronger form of the point-set-additive pseudoweighting property of simple games. The characterization obtained ...
    • A critical analysis on the notion of power 

      Freixas Bosch, Josep; Pons Vallès, Montserrat (Springer, 2021-08-12)
      Article
      Accés obert
      In this paper we discuss on several ways to extend power indices defined on simple games to the context of (j, 2)-games, i.e., games with 2 possible outputs and j possible input levels. The purpose of this paper is more ...
    • A Fibonacci sequence for linear structures with two types of components 

      Freixas Bosch, Josep; Molinero Albareda, Xavier; Roura Ferret, Salvador (2009-07-23)
      Report de recerca
      Accés obert
      We investigate binary voting systems with two types of voters and a hierarchy among the members in each type, so that members in one class have more influence or importance than members in the other class. The purpose ...
    • A mathematical perspective on how test-type exams are evaluated 

      Freixas Bosch, Josep; Pons Vallès, Montserrat (2020)
      Text en actes de congrés
      Accés restringit per acord de confidencialitat
      Typically, the test type exams with binary answers (true / false) are corrected by adding a +1 to the correct answers, a -1 to the incorrect ones and 0 to non-answered questions. This mainly obeys to a purely statistic ...
    • A new power index based on minimal winning coalitions 

      Freixas Bosch, Josep; Alonso Meijide, José María (2009)
      Report de recerca
      Accés restringit per decisió de l'autor
      Nou índex de poder basat en coalicions shift-minimals
    • A new power index based on minimal winning coalitions without any surplus 

      Alonso Meijide, José María; Freixas Bosch, Josep (2010-04)
      Article
      Accés restringit per decisió de l'autor
      In this paper we propose a new power index useful for the evaluation of each member in a committee, or democratic institution, and the degree of influence over the voting decision making system. The proposed solution is ...
    • A note about decisive symmetric games 

      Puente del Campo, María Albina; Freixas Bosch, Josep; Carreras Escobar, Francisco (2009-04)
      Comunicació de congrés
      Accés restringit per decisió de l'autor
      S'estudien diverses funcions relacionades amb la presa de decisions en jocs simples. L'anàlisi es restringeix a jocs de decisió simètrics i la seva composició i es dóna per suposat que tots els jugadors comparteixen els ...
    • A note on decisive symmetric games 

      Carreras Escobar, Francisco; Freixas Bosch, Josep; Puente del Campo, María Albina (2011)
      Article
      Accés restringit per política de l'editorial
      Binary voting systems, usually represented by simple games, constitute a main DSS topic. A crucial feature of such a system is the easiness with which a proposal can be collectively accepted, which is measured by ...
    • A parameterization for a class of complete games with abstention 

      Freixas Bosch, Josep; Tchantcho, Bertrand; Tsague, Bill Procès (2019-02-28)
      Article
      Accés obert
      Voting games with abstention are voting systems in which players can cast not only yes and no vote, but are allowed to abstain. This paper centers on the structure of a class of complete games with abstention. We obtain, ...
    • A probabilistic unified approach for power indices in simple games 

      Freixas Bosch, Josep; Pons Vallès, Montserrat (Springer, 2019-11-01)
      Capítol de llibre
      Accés obert
      Many power indices on simple games have been defined trying to measure, under different points of view, the “a priori” importance of a voter in a collective binary voting scenario. A unified probabilistic way to define ...
    • A value for j-cooperative games: some theoretical aspects and applications 

      Freixas Bosch, Josep (CRC Press, 2019-12-06)
      Capítol de llibre
      Accés obert
      A value that has all the ingredients to be a generalization of the Shapley value is proposed for a large class of games called j-cooperative games which are closely related to multi-choice games. When it is restricted to ...
    • Achievable hierarchies in voting games with abstention 

      Freixas Bosch, Josep; Tchantcho, Bertrand; Tedjeugang, Narcisse (Elsevier, 2014-07-01)
      Article
      Accés obert
      It is well known that he influence relation orders the voters the same way as the classical Banzhaf and Shapley-Shubik indices do when they are extended to the voting games with abstention (VGA) in the class of complete ...
    • All power structures are achievable in basic weighted games 

      Freixas Bosch, Josep; Pons Vallès, Montserrat (Springer, 2023-04-09)
      Capítol de llibre
      Accés restringit per política de l'editorial
      A major problem in decision making is designing voting systems that are as simple as possible and able to reflect a given hierarchy of power of its members. It is known that in the class of weighted games all hierarchies ...
    • Amplitude of weighted majority game strict representations 

      Freixas Bosch, Josep; Puente del Campo, María Albina (Institut d'Estadística de Catalunya, 1999)
      Article
      Accés obert
      Some real situations which may be described as weighted majority games can be modified when some players increase or decrease their weights and/or the quota is modified. Nevertheless, some of these modifications do not ...
    • An aggregation rule based on the binomial distribution 

      Freixas Bosch, Josep (Multidisciplinary Digital Publishing Institute (MDPI), 2022-11-23)
      Article
      Accés obert
      Many decision-making situations require the evaluation of several voters or agents. In a situation where voters evaluate candidates, the question arises of how best to aggregate evaluations so as to compare the candidates. ...
    • An aggregation rule under uncertainty 

      Freixas Bosch, Josep (2023)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Many decision-making situations require the evaluation of several agents or judges. In a situation where agents evaluate candidates, the question arises of how best to aggregate evaluations so as to compare the candidates. ...
    • An appropriate way to extend the Banzhaf index for multiple levels of approval 

      Freixas Bosch, Josep; Pons Vallès, Montserrat (Springer Nature, 2021-01-03)
      Article
      Accés obert
      The Banzhaf power index for games admits several extensions if the players have more than two ordered voting options. In this paper we prove that the most intu-itive and recognized extension ...
    • An axiomatic characterization of the potential decisiveness index 

      Freixas Bosch, Josep; Pons Navarro, Montserrat (2015-03-01)
      Article
      Accés obert
      Let us consider that somebody is extremely interested in increasing the probability of a proposal to be approved by a certain committee and that to achieve this goal he/she is prepared to pay off one member of the committee. ...
    • An axiomatization for two power indices for (3,2)-simple games 

      Bernardi, Giulia; Freixas Bosch, Josep (2019-01-01)
      Article
      Accés obert
      The aim of this work is to give a characterization of the Shapley–Shubik and the Banzhaf power indices for (3,2)-simple games. We generalize to the set of (3,2)-simple games the classical axioms for power indices on simple ...
    • An equivalent formulation for the Shapley value 

      Freixas Bosch, Josep (Springer, 2018-12-30)
      Capítol de llibre
      Accés obert
      An equivalent explicit formula for the Shapley value is provided, its equivalence with the classical one is proven by double induction. The importance of this new formula, in contrast to the classical one, is its capability ...