If Technology Has Arrived Everywhere, Why has Income Diverged?
---- Acknowledgements ----
We are grateful to Thomas Chaney, Christian Hellwig, Chad Jones, Pete Klenow, Franck Portier, Mar Reguant and seminar participants at Boston University, Brown University, CERGE-EI, Edinburgh, HBS, LBS, Minnesota Fed, Stanford GSB, UAB, Univeristy of Toronto and TSE for useful comments and suggestions. Comin acknowledges the generous support of INET. All remaining errors are our own. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.