'Social science is at its best when it questions conceived wisdom with rigorous empirical analysis. This is exactly what Federalism and the Welfare State does, and it does it very well, indeed, showing that decentralized polities do not necessarily imply weaker welfare states. Written by some of the World's leading authorities, this book is a must for students of federalism and of the welfare state - an exceedingly important scientific contribution.' Goesta Esping-Andersen, Universitat Pompeu Fabra, Barcelona