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...Nber working paper series the incubator of human capital and rise paradigm claudia goldin lawrence f katz http www org papers w national bureau economic research massachusetts avenue cambridge ma march presented at session evolution aea meetings in san diego ca we thank our discussant james heckman stanley engerman for constructive comments jennifer walsh locating library congress codes all volumes dedicate this to martin feldstein whose vision brought into modern age made meeting place economists an views expressed herein are those authors do not necessarily reflect circulated discussion comment purposes they have been peer reviewed or subject review by board directors that accompanies official publications rights reserved short sections text exceed two paragraphs may be quoted without explicit permission provided full credit including notice is given source no jel b j abstract construct deep bones economics finds reference many classical even if did use phrase term seldom mentioned b...