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...

The new voting system of the Council of the European Union cannot be represented as the intersection of six or fewer weighted games, i.e., its dimension is at least 7. This sets a new record for real-world voting bodies. A heuristic combination of different discrete optimization methods yields a...