The Missing "Missing Middle"

Chang-Tai Hsieh, Benjamin A. Olken

NBER Working Paper No. 19966
Issued in March 2014

---- Acknowledgments ----

Prepared for the Journal of Economic Perspectives. We thank Arianna Ornaghi, Nick Tsivanidis, Pedro-José Martínez-Alanis and especially Donghee Jo for outstanding research assistance and Abhijit Banerjee, Esther Duflo, Santiago Levy, Pete Klenow, and John Van Reenan for helpful comments. The results from the Mexican Census have been screened by Mexico's INEGI to ensure no confidential data is released. 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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