Since the political collapse of the 90’s, and in particular since the bicameral commission experience of 1997, Italian governments have always tried to face the need for wide constitutional reform. Reductions in the number of deputies and senators have been planned on several occasions. The...

In this paper we analyze the fairness of the 2007 reform proposal concerning the apportionment of the seats between the regions for the Italian Senate. Theory of power indices is used to compare the actual case with the proposed one. Two scenarios are proposed, senators belonging to the same...

This paper aims to give a global vision concerning the state of the art of studies on 13 power indices and to establish which of them are more suitable for describing the real situations which are, from time to time, taken into consideration. In such contexts, different comparisons have been...

The paper presents some issues currently under studying in the field of Cooperative Games. The related open problems are also mentioned.

This paper presents a review of literature on simple games and highlights various open problems concerning such games; in particular, weighted games and power indices.

After a brief description of a representative selection of power indices and a discussion of the notion of power in collective decision making, the paper discusses the modeling of power of an individual or collective agent as identified with the potential or factual effect the decision of this...

The paper presents the problem of choosing the representatives in an assembly when the whole electoral region is subdivided into several electoral districts. Because of the two dimensions, geographical (districts) and political (parties), the problem is called bi-apportionment. The main purpose...

We analyze and evaluate the power of each member state of the European Union according to the different relations between them. To do that, we use power indices introduced by Andjiga and Courtin (2010) for games in which the players are organized into a priori coalition configurations. As a...

We evaluate the accuracy of power indices by experimentally measuring the political power embodied in blocks of votes per se. The experiment incorporates several subjects interacting in online chat rooms under supervision. Chat rooms and processes for selecting subjects reduce or eliminate...