Sweezy Marginal Revenue P D2(Rival matches your price change) 0 D MR (Rival holds its price constant MRI MR Michael R Baye, Managerial Economics and Business Strategy, 3e. CThe McGraw-Hill Companies, Inc, 1999Michael R. Baye, Managerial Economics and Business Strategy, 3e. ©The McGraw-Hill Companies, Inc. , 1999 Sweezy Marginal Revenue P Q D1 P0 Q0 D2 (Rival matches your price change) (Rival holds its price constant) MR1 MR2 D MR