NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Steven Usselman

Georgia Tech

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NBER Working Papers and Publications

January 1999Patents, Engineering Professionals, and the Pipelines of Innovation: The Internalization of Technical Discovery by Nineteenth-Century American Railroads
in Learning by Doing in Markets, Firms, and Countries, Naomi R. Lamoreaux, Daniel M. G. Raff and Peter Temin, editors
 
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