Despite western Europe's traditional disdain for the United States' "adversarial legalism," the European Union is shifting toward a very similar approach to the law, according to Daniel Kelemen. Coining the term "eurolegalism" to describe the hybrid that is now developing in Europe, he shows how the political and organizational realities of the EU make this shift inevitable.

The model of regulatory law that had long predominated in western Europe was more informal and cooperative than its American counterpart. It relied less on lawyers, courts, and private enforcement, and more on opaque networks of bureaucrats and other interests that developed and implemented regulatory policies in concert. European regulators chose flexible, informal means of achieving their objectives, and counted on the courts to challenge their decisions only rarely. Regulation through litigation-central to the U.S. model-was largely absent in Europe.

But that changed with the advent of the European Union. Kelemen argues that the EU's fragmented institutional structure and the priority it has put on market integration have generated political incentives and functional pressures that have moved EU policymakers to enact detailed, transparent, judicially enforceable rules-often framed as "rights"-and back them with public enforcement litigation as well as enhanced opportunities for private litigation by individuals, interest groups, and firms.

This book examines patterns of environmental regulation in the European Union and four federal polities--the United States, Germany, Australia, and Canada. Daniel Kelemen develops a theory of regulatory federalism based on his comparative study, arguing that the greater the fragmentation of power at the federal level, the less discretion is allotted to component states. Kelemen's analysis offers a novel perspective on the EU and demonstrates that the EU already acts as a federal polity in the regulatory arena.

In The Rules of Federalism, Kelemen shows that both the structure of the EU's institutions and the control these institutions exert over member states closely resemble the American federal system, with its separation of powers, large number of veto points, and highly detailed, judicially enforceable legislation. In the EU, as in the United States, a high degree of fragmentation in the central government yields a low degree of discretion for member states when it comes to implementing regulatory statutes.