Vote Weighting in the European Union: Confronting the Dilution of Representation?

Abstract: The extent to which there is a regular relationship between the current voting weights in Council of European Union member states and their populations is investigated. It is shown that a model of alpha- or weak proportionality has a high explanatory power, with certain restrictions. Further desirable heuristic properties are considered. A particular proposal for extension of the current system to account for EU expansion to include Central and East European countries is evaluated in this light. However, even although this relationship between votes and population remains fixed, prior enlargements of the EU effectively changed the degree to which votes represent the Union's population. A methodology for calculating a Coefficient of Representation is introduced in this paper to measure this previously unquantified phenomenon. It is shown that a 'dilution of representation' has occurred and will continue unless a new voting system is introduced. Finally some alternative votingweights are presented as examples. These are constructed in such a manner as to preserve the basic principles found in the current system , but which raise the degree of representation moderately.;