This 2007 book examines the dynamic processes whereby constitutional systems influence each other.

1. Migration as a new metaphor in comparative constitutional law Sujit Choudhry; Part I. The Methodology of Comparativism: 2. On the blurred methodological matrix of comparative constitutional law Ran Hirschl; 3. Some reflections on method in comparative constitutional law Mark Tushnet; 4. The postwar paradigm and American exceptionalism Lorraine Weinrib; Part II. Convergence Toward a Liberal Democratic Model?: 5. Questioning the migration of constitutional ideas: rights, constitutionalism and the limits of convergence Jeff Goldsworthy; 6. Spreading liberal constitutionalism: an inquiry into the fate of free speech rights in new democracies Andras Sajo and Michel Rosenfeld; 7. Underlying principles and the migration of reasoning templates: a trans-systemic reading of the Québec Secession Reference Jean-François Gaudreault-Desbiens; 8. Migrating marriages and comparative constitutionalism Brenda Cossman; Part III. Comparative Constitutional Law, International Law and Transnational Governance: 9. Inimical to constitutional values: complex migrations of constitutional rights Mayo Moran; 10. Democratic constitutionalism encounters international law: terms of engagement Mattias Kumm; 11. Constitution or model treaty? Struggling over the interpretive authority of NAFTA David Schneiderman; 12. The migration of constitutional ideas and the migration of the constitutional idea: the case of the EU Neil Walker; Part IV. Comparative Constitutional Law in Action - Constitutionalism Post 9/11: 13. The migration of anti-constitutional ideas: the post-9/11 globalization of public law and the international state of emergency Kim Scheppele; 14. The post-9/11 migration of Britain's Terrorism Act 2000 Kent Roach; 15. Control systems and the migration of anomalies Oren Gross.