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A monopolist finds out that if it expands output from 13 to 14 units, it will have to lower its price from $25 to $20

Economics Dec 15, 2020

A monopolist finds out that if it expands output from 13 to 14 units, it will have to lower its price from $25 to $20.

a. Calculate the monopolist's marginal revenue of producing the 14th unit.

b. If the marginal cost of producing the additional good is positive, should this monopolist produce the 14th unit?

Expert Solution

Answer to a

The total revenue when 13 units are sold is given by:

  • = Selling price per unit * number of units sold
  • = $25 * 13
  • = $325

The total revenue when 14 units are sold is given by:

  • = Selling price per unit * number of units sold
  • = $20 * 14
  • = $280

The monopolist's marginal revenue of producing the 14th unit is given by:

  • = Total revenue when 14 units are sold - total revenue when 13 units are sold
  • = $325 - $280
  • = -$45

Answer to b

The monopolist should not produce the 14th unit because the marginal revenue for the 14th unit is negative while the marginal cost for the 14th unit is positive which in turn will lead to marginal loss.

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