Market Consolidation and Pricing Developments in Grocery Retailing: A Case Study

When large retailers merge, there is a concern that a sudden and marked increase in concentration will alter the intensity and nature of price competition to the detriment of consumers. This chapter considers just such a situation in regard to UK grocery retailing, which has witnessed steadily increasing concentration over recent years, advanced by a series of mergers. Specifically, we examine the nature of price competition amongst the major “one-stop-shop” retail chains before, during, and after the Safeway/Morrison merger in March 2004.We find the merger offered consumers an immediate windfall benefit — with average prices falling straight after the merger—and more intriguingly appears to have led to (or at least is associated with) a marked change in the character of price competition in the market.