Homework4Fall2019.pdf
Managerial Economics – HW 4
Name:_____________________ Must Show Work for Full or Partial Credit
Question 1:
Use the information below to calculate the output that would maximize the firm's profit or minimize its lost.
What was the firm's total economic profit or loss?
TC = 40+120Q+10Q2
TR = 600Q
Question 2: (Graphs must be hand drawn).
Part A: Draw MC, ATC, and AVC on a graph representing the cost of a toy plane manufacture. Assume the
firm is a price taker (perfect competition). Draw a line representing the price the firm will revive for its
product as it varies its output. Draw a line representing the MR the firm will revive for its product as it
varies its output. Deduce from the graph if the firm is earning an economic profit or loss. Indicate on the
graph the firm's total economic profit or loss.
Part B: Draw MC, ATC, and AVC on a graph representing the cost of an ear muff manufacture. Assume the
firm is a price searcher (Monopoly or Monopolistic Competition). Draw a line representing the price the
firm will revive for its product as it varies its output. Draw a line representing the MR the firm will revive
for its product as it varies its output. Deduce from the graph if the firm is earning an economic profit or
loss. Indicate on the graph the firm's total economic profit or loss.
Question 3:
Part A: Explain why in the long run economist expect a price taking firm to earn a normal economic profit?
Part B: Explain why a price searcher cu
ently earning an economic profit is expect to earn an economic
profit in the long run.
Question 4: Use the information below to answer the following questions.
Market share of every Kleenex Maker: A. 350 B. 250 C. 200 D. 175 E. 25
Part A: Calculate Four-firm concentration ratio.
Part B: Calculate Herfindahl-Hirschman Index (HHI).
Part C: Imagine you are company A trying to avoid being regulated. Argue two ways can these indexes
overestimate competition?
Part D: Imagine you are company E trying to get company E to be regulated. Describe two ways these
indexes underestimate competition?
Question 5: Imagine you are an economic adviser to Firm A. Answer the questions below as if you are
giving advice to the firm on how to make the most money.
Part A: What are the positives and negatives of nationalizing a monopoly?
Part B: What are the positives and negatives of regulating prices or profits earned by a monopoly?
Part C: Under what conditions can a monopoly form without any special privileges granted by the
government?
Part D: Provide three ways a government can contribute to the formation of a monopoly.