NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Technological Leadership (de)Concentration: Causes in ICTE

Yasin Ozcan, Shane Greenstein

NBER Working Paper No. 22631
Issued in September 2016

---- Acknowledgements ----

We thank Colleen Mallahan for research assistance. We also thank Ben Jones, Scott Stern, and seminar participants for comments. We thank Kate Adams for editorial assistance. We also thank the Dean’s Office and the GM Strategy Research Center of the Kellogg School of Management for funding. We are responsible for all errors. An earlier version of this paper was circulated with the title “The (de)Concentration of Sources of Inventive Ideas: Evidence from ICT Equipment” 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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