"Federations is a joy to read and provides an extremely useful framework for understanding why countries choose this form of alliance. Chad Rector's clear explanation builds on the broad literature on cooperation and the narrower literature on institutional choice and federalism and adds the exquisite dimension of elucidating not simply why countries federate but why they choose this option over self-sufficiency or joining an international organization."—Carol S. Weissert, LeRoy Collins Eminent Scholar and Professor of Political Science, Florida State University, and editor of Publius: The Journal of Federalism