The Hollow Core is by far the most comprehensive survey yet of the Washington lobbyists' life and work...A much more complete and credible analysis about the way modern Washington works emerges than in so many previous accounts.
   --Tim Hames, Financial Times

The most thorough and masterly treatment ever delivered of the role of private interests in national policy making. The Hollow Core will constitute the solid center of research in this field for years to come. It teaches us much, not only about private interests but also about policy making.
   --John T. Tierney, Political Science Quarterly

A monumental piece of empirical research that will be required reading for anyone concerned with interest group representation in the United States.
   --Paul A. Sabatier, American Journal of Sociology

John P. Heinz is Distinguished Research Fellow, American Bar Foundation, and Owen L. Coon Professor of Law, Northwestern University.

Edward O. Laumann is George Herbert Mead Distinguished Service Professor of Sociology, and Provost, University of Chicago.

Robert L. Nelson is Research Fellow, American Bar Foundation, and Associate Professor of Sociology, Northwestern University.

Robert H. Salisbury is Sidney Souers Professor of American Government, Washington University, St. Louis.