ECON 1000 Lecture Notes - Lecture 16: Perfect Competition, Market Power, Marginal Cost

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11 Nov 2015

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Econ1000 lecture 16 chapter 12: perfect competition. Objectives: define perfect competition, price and output determination in perfect competition, shut down point, enter and exit, effects of a change in demand and of a technological advancement, perfect competition and efficiency. The perfectly competitive form makes two decisions in the short-run: whether to produce or to shut down. If the decision is to produce, what quantity to produce. Long-run: whether to increase or decrease its plant size, whether to stay in the industry or leave it. The firm"s decision in perfect competition: marginal analysis. Profit is maximized by producing the output at which marginal revenue (mr) equals marginal cost (mc). Mr = mc: when mr > mc, profit increases if q decreases, when mr < mc, profit decreases if q increases, when mr = mc, profit decreases if q increases or decreases.

Related Questions

Match the following.

constant-cost industry	A market structure in which a large number of firms sell a homogenous product or service with no restrictions on entry or exit and each firm is a price-taker.
increasing-cost industry	The demand facing a price-taking firm.
long-run equilibrium	A firm produces zero output but must still pay its fixed costs.
marginal revenue product	Price below which a firm shuts down in the short run.
perfect competition	All firms produce where price equals long-run marginal cost, and economic profits are zero.
perfectly elastic demand	Industry in which input prices rise as all firms in the industry expand output.
shut down	Industry in which input prices remain constant as all firms in the industry expand output.
the shut-down price	The additional revenue earned by hiring one more unit of a variable input.

viridianhare336

21)

Compared to the results in a perfectly competitive market, a monopoly does which of the following?

	It charges a higher price.
	It charges a price greater than the marginal cost.
	It produces less output.
	All of the above
	None of the above

22)

"X-inefficiency" refers to the idea that

	government restrictions on competition create a monopoly, which results in inefficiency.
	the cost of rent-seeking activity should be added to the welfare cost of monopoly.
	Generation X is less efficient due to a lack of competitive spirit.
	a lack of competitive pressure results in a monopoly not keeping its costs down to the lowest possible level.
	price discrimination results in inefficiently low cross-elasticities of demand.

23)

Firms in which of the following market structures can engage in price discrimination?

	monopoly
	oligopoly
	monopolistic competition
	All of the above
	None of the above

24)

Monopolistic competition and perfect competition are in all of the following ways except

	Barriers to entry are low in both
	There are many firms in both
	Firms in both produce the output level where MR=MC
	Nonprice competition is important in both

25)

To get rid of excess capacity from the monopolistic competition in the long run, what would have to be given up?

	Free entry and exit.
	economic rent
	resource allocative efficiency
	differentiated product
	productive efficiency

taupeant454

Q8. To arrive at a logical determination of a firm's optimum output, economists assume that the firm seeks to
a. maximize output
b. minimize cost
c. maximize profit or minimize loss
d. maximize price

Q9. So long as marginal cost is rising, average variable cost must rise.
a. true
b. false

Q10. As output increases, marginal cost increases, reaches a maximum, and then falls.
a. true
b. false

Q11. Which of the following is the best example of variable cost?
a. depreciation on a building
b. property taxes
c. wages
d. rent paid for one's building

Q12. If the AVC is $12, the AFC is $4, the AR is $20, and output is 6,000 units, the total profit is
a. $72,000
b. $48,000
c. $24,000
d. negative $96,000

Q13. Under perfect competition, if a firm is suffering a loss,
a. MR exceeds ATC
b. AR equals AVC
c. AR equals ATC
d. AR is less than ATC

Q14. Elaine's firm is in a perfectly competitive industry. Why doesn't Elaine try to sell more of her product by lowering its price below the market price?
a. her demand curve is not elastic
b. doing so would be considered unethical price chiseling
c. her competitors would not allow it
d. she can sell all she wants at the market price

Q15. In the long run, perfect competition results in firms producing
a. at the minimum point of their long-run average cost curves, which indicates allocative efficiency
b. where price equals marginal cost, which indicates economic efficiency
c. where price equals marginal cost, which indicates the optimal scale of operation
d. at the minimum point of their long-run average cost curves, which indicates economic efficiency

Q16. On a graph of average cost curves, the space between ATC and AVC represents AFC.
a. true
b. false

Q18. If MC equals MR at a point greater than ATC, the perfectly competitive firm will
a. sustain a loss
b. shut down
c. make an economic profit
d. expand output

Q19. Since all producers have the same average revenue under conditions of perfect competition, they all have the same profits in the short run.
a. true
b. false

Q20. If the entry of new firms in a perfectly competitive industry substantially increases the market demand for resources,
a. this reduces the market price of resources
b. this raises the market price of resources
c. the market price of resources does not change
d. this lowers the ATC curves of individual firms

Q22. Under conditions of perfect competition, profits exist whenever AR is above AVC at equilibrium output.
a. true
b. false

Q23. Under perfect competition, market price is determined by market demand and supply.
a. true
b. false

Q24. If one firm in a perfectly competitive industry is somehow able to produce at a lower cost than competing firms in the short run,
a. the competing firms will adopt similar production techniques in the long run
b. the more efficient firm will earn higher profits than the competing firms in the long run
c. the competing firms will earn higher profits than the more efficient firm in the short run
d. the competing firms will go out of business in the long run

ECON 1000 Lecture Notes - Lecture 16: Perfect Competition, Market Power, Marginal Cost

ECON 1000 Full Course Notes

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