This paper reviews the basic components of antitrust analysis for the supermarket industry, including definition of product and geographic markets and the measurement of market power. The analysis of prices and profits in a market structure context remains important, especially in countries such...

Recent empirical work suggests that cooperative presence in differentiated product markets lowers the consumer prices of all brands. This paper focuses on the theoretical basis for this competitive yardstick effect by cooperatives. It identifies two market structures where the competitive...