Parties and voters : the feasibility of a European system of political representation / Jacques Thomassen -- Can the circle be squared? Political representation and political integration in Europe / Bernhard Wessels -- Transnational trends : the evolution of the European party system / Luciano Bardi -- Beneficial cooperation or mutual ignorance? contacts between MEPs and national parties / Tapio Raunio -- Going native? Institutional and partisan loyalty in the European Parliament / Roger Scully -- When words matter : informal rules and the enlargement debate / Stefanie Bailer and Gerald Schneider -- Playing different games : the European Parliament and the reform of codecision / Bernard Steunenberg -- European Parliament and environmental legislation / George Tsebelis and Anastassios Kalandrakis.