NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Cementing Relationships: Vertical Integration, Foreclosure, Productivity, and Prices

Ali Hortacsu, Chad Syverson

NBER Working Paper No. 12894
Issued in February 2007

---- Acknowledgements -----

We thank Daron Acemoglu, Tim Bresnahan, Jeremy Fox, John Haltiwanger, Justine Hastings, Tom Holmes, Tom Hubbard, Eddie Lazear, Canice Prendergast, Lynn Riggs, Mike Riordan, Mark Roberts, Nancy Rose, Kathryn Shaw, Mike Whinston, numerous seminar participants, and anonymous referees for helpful comments. Jeremy Shapiro provided valuable research assistance. Hortacsu thanks the Center for Industrial Organization at Northwestern University for its hospitality, and Syverson is grateful for financial support from the NSF (award no. SES-0519062), the Olin Foundation, and the Stigler Center. The research in this paper was conducted while the authors were Special Sworn Status researchers of the U.S. Census Bureau at the Chicago Census Research Data Center. Research results and conclusions expressed are those of the authors and do not necessarily reflect the views of the Census Bureau. This paper has been screened to insure that no confidential data are revealed. Support for this research at the Chicago RDC from NSF (awards no. SES-0004335 and ITR-0427889) is also gratefully acknowledged. Both authors can be contacted at the Department of Economics, University of Chicago, 1126 E. 59th Street, Chicago, IL 60637. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research.

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