Refer to the diagram for a non-collusive oligopolist. We assume that the firm is initially in equilibrium at point E, where the equilibrium price and quantity are P and Q. If the firm's rivals will ignore any price increase but match any price reduction, over what range might marginal cost rise without disturbing equilibrium price and output?

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The Answer of  Refer to the diagram for a non-collusive oligopolist. We assume that the firm is initially in equilibrium at point E, where the equilibrium price and quantity are P and Q. If the firm's rivals will ignore any price increase but match any price reduction, over what range might marginal cost rise without disturbing equilibrium price and output?

Refer to the Diagram for a Non-Collusive Oligopolist