Cross Price Elasticity of Demand %△Qx Ox 0△P Y Substitutes Complements 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 Cross Price Elasticity of Demand + Substitutes - Complements Y d X Q P P Q E X Y   = % %