Much of the research and writing included in this volume originated in the preparation of the author's doctoral dissertation submitted to the Department of Economics of the University of California, Los Angeles. The study was first suggested by Professor Dudley F. Pegrum, who directed the dissertation with a degree of efficiency and understanding greater than any graduate student is entitled to expect, and who also read and criticized the manuscript of this book at several stages. Professor Paul F. Homan's criticism, advice, and encouragement at all stages were also invaluable. It is impossible adequately to acknowledge the debt owed these two inspiring and stimulating teachers.
The author also wishes to thank Professors Warren C. Scoville, J. Fred Weston, Marvel M. Stockwell, George H. Hildebrand, and Wytze Gorter, all of the University of California, Los Angeles, for their help at various points in the preparation of this work. Several members of the staffs of the Federal Trade Commission and the Department of Justice greatly facilitated the research on which this book is based by providing information and criticism. Dr. Irston R. Barnes and Dr. Frank J. Kottke of the Federal Trade Commission, Dr. John M. Blair, formerly with that agency, and