Competition and Product Quality in the Supermarket Industry
David A. Matsa
Northwestern University - Kellogg School of Management
November 14, 2010
Quarterly Journal of Economics, Forthcoming
This paper analyzes the effect of competition on a supermarket firm’s incentive to provide product quality. In the supermarket industry, product availability is an important measure of quality. Using U.S. consumer price index microdata to track inventory shortfalls, I find that stores facing more intense competition have fewer shortfalls. Competition from Wal-Mart – the most significant shock to industry market structure in half a century – decreased shortfalls by up to 24 percent. The risk that customers will switch stores appears to provide competitors with a strong incentive to invest in product quality.
Number of Pages in PDF File: 52
Keywords: product quality, competition, monopoly, big-box, inventory management, stockout
JEL Classification: D40, G31, L15, L81working papers series
Date posted: August 3, 2009 ; Last revised: November 21, 2010
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