These essays on the economics of fiscal federalism contain original research by experts in North America and Europe on a timely topic. Reform of fiscal relations between central and subnational governments is an urgent priority in many countries since increased economic integration within and among countries means that goods, services, capital, and human resources can flow across political boundaries more easily than before. The structure of intergovernmental transfers, tax competition, and the fiscal implications of labor migration are analyzed for audiences in economics, political science, and public policy.