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    Second-Degree Price Discrimination Benefits

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    Suppose that individual demand for a product is given by QD = 1000 - 5P. Marginal revenue is MR = 200 - 0.4Q, and marginal cost is constant at $20. There are no fixed costs.

    a. The firm is considering a quantity discount. The first 400 units can be purchased at a price of $120, and further units can be purchased at a price of $80. How many units will the consumer buy in total?

    b. Show that this second-degree price-discrimination scheme is more profitable than a single monopoly price.

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    Solution Preview

    Qd = 1000 - 5P
    Let P = 120
    Qd = 1000 - 5(120)
    Qd = 1000 - 600
    Qd = 400

    At a price of $120, the consumer will buy 400 units.

    Let P = 80
    Qd = 1000 - 5(80)
    Qd = 1000 - 400
    Qd = 600

    At a price ...

    Solution Summary

    Given the function of the demand curve for a product and a monopolist's Marginal Cost, this solution shows how second degree price discrimination in the form of a quantity discount can increase the firm's profits. All calculations are given and explained in full.