Workshop on “Party System Stability and Electoral Volatility: its Measurements and Implications” at the School of Politics and International Relations (University of Nottingham) with the following participants: Ingrid van Biezen (Leiden University), Fernando Casal Casal Bértoa (University of Nottingham), Kevin Deegan-Krause (Wayne State University), Cees van der Eijk (University of Nottingham), Carlos Gervasoni (University of Buenos Aires), Tim Haughton (University of Birmingham), Mathew Humphrey (University of Nottingham), Nicolas Sauger (Science-Po), Allan Sikk (University College London), Lori Thorlakson (University of Alberta), Mariano Torcal (Pompeu-Fabra), and Annemarie Walter (University of Nottingham)