This major three volume collection celebrates the legacy of Robert E. Lucas, Jr., winner of the Nobel Memorial Prize in Economic Science in 1994, founder of the New Classical School and one of the most influential macroeconomists of the late twentieth century. The Legacy of Robert Lucas, Jr. presents the eleven most influential articles on macroeconomics by Robert Lucas, Jr. together with articles by a wide variety of other key economists who extend, develop, criticize, or are otherwise significantly influenced by Lucas's seminal ideas.