While the study deals with an essentially technical subject, Brown's analysis is cast in language that is readily understandable to nonspecialists. Written primarily for labor economists, this book should also interest all members of the academic community.Originally published in 1958.A UNC Press Enduring Edition -- UNC Press Enduring Editions use the latest in digital technology to make available again books from our distinguished backlist that were previously out of print. These editions are published unaltered from the original, and are presented in affordable paperback formats, bringing readers both historical and cultural value.