Designed to sit along the 2008 set, "Electoral Behaviour", this collection brings together leading electoral systems experts from either side of the Atlantic. The last 25 years have seen this initially underdeveloped discipline in political science grow exponentially in level and range of output. Examining and mapping these rapid developments this collection covers the following general themes: electoral system design and reform; indices relating to electoral systems, such as proportionality, effective number of parties; Duverger's Laws; electoral systems, stability and other consequences; and, particular electoral systems.