"These articles form the basis for the several lectures delivered during the Sixth Annual Conference on Labor conducted jointly by the Law School, the Graduate Division of Public Service, the Graduate School of Arts and Science, and the Division of General Education of New York University, held in New York City, May 6, 7, 8, 1953. Many of the articles as printed here are expanded beyond their original lecture form and enjoy the advantage of footnote citations and other helpful addenda."