How, and under which conditions, can consultative committees exert influence if they have access to legislators (voice) but no formal veto power (vote)? In drawing on the Committee of the Regions and the European Economic and Social Committee of the European Union, this book shows that consultative committees face several challenges when it comes to influencing the content of policies, but are nevertheless sometimes successful in getting their opinions heard. It develops a sender-receiver model and puts it to a comprehensive empirical test. A quantitative analysis and three in-depth case...