This volume takes stock of twenty years of practising and studying codecision in the European Union (EU) and examines the procedure s long-term implications for the EU s institutions, politics and policies. The introduction of co-legislation between the Council of Ministers and the European Parliament in 1993 raised the prospect of increased parliamentary involvement in EU decision-making and promised a new era of more transparent, inclusive and accountable policy-making. This collection draws together contributions from diverse theoretical and methodological perspectives in order to...