Nach der Ablehnung des Europäischen Verfassungsvertrages bei den Referenden in Frankreich und den Niederlanden und den gescheiterten Finanzverhandlungen befindet sich die Europäische Union in einer Krise. Eberhard Sinner, bayerischer Staatsminister für Europaangelegenheiten und regionale...

The paper analyses the evolution of the decision making process within the EU and assesses the effectiveness of the European voting procedures in the context of current and potential future enlargement. Based on a simulation model, we discussed some different scenarios of the voting...

This paper deals with the non-emptiness of the stability set for any proper voting game. We present an upper bound on the number of alternatives which guarantees the non emptiness of this solution concept. We show that this bound is greater than or equal to the one given by Le Breton and Salles...

In this paper a method is offered for calculating the power of political parties in the Spanish parliament. This is a modification of the Shapley-Shubik index which allows the ideological affinities between parties to be taken into account. It extends Myerson's model of games with restricted...

I present a proof on finiteness of Von Neumann and Morgenstern's majority stable sets in multidimensional voting games in the case of differentiable utility functions on Rk and 3 players. The central hypothesis is based on a light separation property which is real common for family of functions...

In this paper we establish equivalence between six collections of axioms that all characterize the Carreras-Coleman decisiveness index. Axioms in each of the different sets are shown to be independent.

Let A be a finite set of m alternatives, let N be a finite set of n players and let R^N be a profile of linear preference orderings on A of the players. Let u^N be a profile of utility functions for R^N. We define the NTU game V_u^N that corresponds to simple majority voting, and investigate its...

This paper deals with the non-emptiness of the stability set for any proper voting game.We present an upper bound on the number of alternatives which guarantees the non emptiness of this solution concept. We show that this bound is greater than or equal to the one given by Le Breton and Salles...

Coleman [1971. Control of collectives and the power of a collectivity to act. In: Lieberman, B. (Ed.), Social Choice. Gordon and Breach, New York, pp. 269ï¾–298] suggested two indices of voting power, power to prevent an action and power to initiate an action. This paper rigorously...

This paper develops a new axiomatic characterization of the Banzhaf index of power using four axioms from four different contributions to the area. A nice feature of the characterization is independence of the axioms showing importance of each of them in the exercise.