Complete Question:
Suppose a firm faces an identical inverse demand curve of P= 140-Q for each consumer in the market. Currently, the firm's average cost = marginal cost = $40.
Determine the profit-maximizing price and identical lump-sum fee to charge with a two-part tariff
The profit-maximizing price to charge is $ ____?
Identical lump- sum fee ___?
Answer:
Price is $40
Identical lump- sum fee is 5000.
Explanation:
Here
P = 140 - Q
This means
Maximum price the customer is willing to pay is $140
Average Cost = Marginal Cost = $40
This will be the price the firm will charge in two part tariff. Hence,
Price per Unit = $40 per Unit
By putting the above values, we have:
40 = 140 - Q
Q = 140 - 40
Q = 100 Units
Now, the consumer surplus can be calculated using the following formula:
Consumer Surplus = 1/2 * (Max. Price that the customer is willing to pay - Market Price) * Quantity
Consumer Surplus = 1/2 * ($140 - $40) * 100 Units = 5000