Power index research has been a very active field in the last decades. Will this continue or are all the important questions solved? We argue that there are still many opportunities to conduct useful research with and on power indices. Positive and normative questions keep calling for...

Chapter 1. Introduction -- Part I. Social Choice -- Chapter 2. Building Bridges over the Great Divide -- Chapter 3. Social Unacceptability for Simple Voting Procedures -- Chapter 4. Probability of Majority Inversion with Three States and Interval Preferences -- Chapter 5. Strategic Voting and...

Political and economic institutions are typically governed by committees that face the challenge to reconcile the preferences of their members. How should decision rules be designed to generate fair and sustainable agreements, for example if committee members represent groups of different sizes?...

We introduce the prediction value (PV) as a measure of players' informational importance in probabilistic TU games. The latter combine a standard TU game and a probability distribution over the set of coalitions. Player i's prediction value equals the difference between the conditional...