NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Tasks and Technology in the United States 1880-2000

Guy Michaels, Ferdinand Rauch, Stephen J. Redding

NBER Working Paper No. 18715
Issued in January 2013

---- Acknowledgements ----

We are grateful to the Centre for Economic Performance and Princeton University for research support. We thank Gilles Duranton, William D. Caughlin, Rowena Gray, George Kupczak and Matt Turner for sharing data. We are grateful to the editor, three anonymous referees, Don Davis, Gilles Duranton, Gene Grossman, Jessie Handbury, Gordon Hanson, Vernon Henderson, Rick Hornbeck, Jeffrey Lin, Marco Manacorda, Alan Manning, Nathan Nunn, Gianmarco Ottaviano, Steve Pischke, Nancy Qian, Esteban Rossi-Hansberg, Yona Rubinstein, Will Strange, Tony Venables and seminar and conference participants at CEPR-CURE, Copenhagen, the London School of Economics, MIT, NARSC, Oxford, Sorbonne, Sussex and UCSD for helpful comments and suggestions. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.

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