Ehrenberg Ronald G Modern labor economics : theory and public policy / Ronald G. Ehrenberg, Robert S. Smith. - 9th ed. - Boston, Mass. ; London : Pearson/Addison-Wesley, 2006. - xx, 604 p. : ill. ; 23 cm. - Addison-Wesley series in economics . Previous ed.: 2003. Includes bibliographical references and indexes. ISBN: 0321311531 Subjects--Topical Terms: Labor economics LC Class. No.: HD4901