The hollow core : private interests in national policy making / John P. Heinz ... [et al.]. Heinz, John P. 1936- Lobbying United States. Pressure groups United States. Agriculture and state United States Decision making. Energy policy United States Decision making. Medical policy United States Decision making. Labor policy United States Decision making. JK1118 .H55 1993 324.40973 20 HOL Includes bibliographical references (p. [427]-439) and index. Cambridge, Mass. : Harvard University Press, 1993. 1993. 1993 Text xix, 450 p. : eng United States. United States. United States United States United States United States