D2(Rival matches your price change H 0 Rival holds its price const Q 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 P Q D1 P0 Q0 PL D2 (Rival matches your price change) P H (Rival holds its price constant)