New Measure of Voting Power

During last two decades we observe a boom of power indices literature related to constitutional analysis of European Union institutions and distribution of intrainstitutional and inter-institutional influence in the European Union decision making. Growing interest to power indices methodology leads also to reconsideration of the methodology itself. In this paper a new general a priori voting power measure is proposed distinguishing between absolute and relative power. This power measure covers traditional Shapley-Shubik and Penrose-Banzhaf power indices as its special cases.