The Evolving Food Chain: Competitive Effects of Wal-Marts Entry into the Supermarket Industry

Abstract

We analyze the effect of Wal-Marts entry into the grocery market using a unique store-level price panel data set. We use OLS and two IV specifications to estimate the effect of Wal-Marts entry on competitors prices of 24 grocery items across several categories. Wal-Marts price advantage over competitors for these products averages approximately 10%. On average, competitors response to Wal-Marts entry is a price reduction of 11.2%, mostly due to smaller-scale competitors: the response of the big three supermarket chains (Albertsons, Safeway, and Kroger) is less than half that size. We confirm our results using a falsification exercises, in which we test for Wal-Marts effect on prices of services that it does not provide, such as movie tickets and dry cleaning services.Wal-Mart, Retail Prices, Supermarkets, Price Competition