The graph shows the demand curve (D), average total cost curve (ATC), average variable cost curve (AVC), and the 90 - marginal cost curve (MC) for a perfectly (or purely) 80 - competitive firm. D= MR 70- Assuming that this firm maximizes profit, what is this firm's profit? 60 - ATC 50 AVC profit: $ 40 40- 30- MC 20 - 10- 40 10 20 30 50 60 70 80 90 Quantity Price and cost ($)

The graph shows the demand curve (D), average total cost curve (ATC), average variable cost curve (AVC), and the 90 - marginal cost curve (MC) for a perfectly (or purely) 80 - competitive firm. D= MR 70- Assuming that this firm maximizes profit, what is this firm's profit? 60 - ATC 50 AVC profit: $ 40 40- 30- MC 20 - 10- 40 10 20 30 50 60 70 80 90 Quantity Price and cost ($)

Principles of Economics 2e

2nd Edition

ISBN:9781947172364

Author:Steven A. Greenlaw; David Shapiro

Publisher:Steven A. Greenlaw; David Shapiro

Chapter8: Perfect Competition

Section: Chapter Questions

Problem 17RQ: Briefly explain the reason for the shape of a marginal revenue curve for a perfectly competitive...

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Suppose that each firm in a competitive industry has the following costs: Total cost: TC = 50 + q2 Marginal cost: MC = q where q is an individual firms quantity produced. The market demand curve for this product is Demand:QD = 120 P where P is the price and Q is the total quantity of the good. Currently, there are 9 firms in the market. a. What is each firms fixed cost? What is its variable cost? Give the equation for average total cost. b. Graph average-total-cost curve and the marginal-cost curve for q from 5 to 15. At what quantity is average-total-cost curve at its minimum? What is marginal cost and average total cost at that quantity? c Give the equation for each firms supply curve. d. Give the equation for the market supply curve for the short run in which the number of firms is fixed. e. What is the equilibrium price and quantity for this market in the short run? f. In this equilibrium, how much does each firm produce? Calculate each firms profit or loss. Is there incentive for firms to enter or exit? g. In the long run with free entry and exit, what is the equilibrium price and quantity in this market? h. In this long-run equilibrium, how much does each firm produce? How many firms are in the market?
Briefly explain the reason for the shape of a marginal revenue curve for a perfectly competitive firm.
1- Suppose that the total cost function of a firm is given as follows;TC = 500 + 2Q2And the price of the firm’s product is determined by the market equilibrium at $100.a- Set the profit maximizing condition . Find the profit maximizing output level for this firm .b- What is the total revenue ?c- What is the total cost ?d- What is the profit earned by the firm ?e- Illustrate your answer by using a well-labeled graph .f- Denote the break even price level with Pb on the same graph .g- Denote the shut down price level with Ps on the same graph.h- Show the firm’s supply curve on the same graph .i- Does the firm function in short-run or long-run ? Why ?
Suppose that each firm in a competitive industry has the following costs: Total cost: TC = 50 + 0.5Q^2The market demand curve for this product is: Qd= 120 −PThere are 9 firms in the market.a) What are each firm’s: fixed cost, variable cost, marginal cost, and average total cost? Graph the average-total-cost curve and the marginal-cost curve.b) Give the equation for each firm’s supply curve.the average-total-cost curve at its minimum? What is marginal cost and average totalc) Give the equation for the market supply curve for the short run in which the numbercost at that quantity?
Suppose that, in a perfectly competitive industry, every firm has total cost function TC(Q)= 5million +4Q+Q²/50,000. Demand is given by D(p) - 375,000(42-2p). (a) If the industry consists of five firms, with no possibility of entry or exit, how much does each firm produce in equilibrium? (b) What is the profit of each firm? (c) How would you answer to part (a) change if there would be a possibility of entry and/or exit? Provide a sketch of how one would solve for the equilibrium outcome.
The table below shows the average cost (AC) for a purely competitive market. The average revenue (AR) is constant at RM5 per unit and the firm’s total fixed cost (TFC) is RM4. If the average revenue falls to RM3 per unit, calculate the firm’s new profit or loss at the equilibrium. Based on your answer, should the firm continue or stop the production? Justify. Output (Units) Total Revenue (RM) Average Cost (RM) Total Cost (RM) Marginal Cost (RM) Marginal Revenue (RM) 1 8.0 2 5.5 3 4.0 4 3.5 5 3.8 6 4.5 7 6.0
Given P = 300 + 200Qs (demand equation), P = 6300 − 50Qd (supply equation), and TC = 500 + 10Q + 0.8Q2 (cost function) in a perfectly competitive market, a profit-maximizing firm will produce an output equal to ________. Round your final answer to the nearest 2 decimal places
Suppose that a perfectly competitive firm faces a market price of $7 per unit. The output level corresponding to a marginal cost of $7 per unit is 1,000 units. At 1,000 units, its average variable costs equal $8 per unit, and its average fixed costs equal $1 per unit. The firm's profit-maximizing (or loss-minimizing) output level = . Write number only. The firm's economic profit (or loss) at this output level = . Write either profit number or loss number: e.g. profit 2000.
Fill the table below given Perfect Competition Conditions Quantity Demanded/ Produced Total Cost Average Fixed Cost Marginal Cost Average Total Cost Average Variable Cost Total Revenue Price=90 Profit 0 $300 -- -- 1 $310 2 $330 3 $360 4 $400 5 $450 6 $510 7 $580 8 $660 9 $750 10 $850 Calculate the Marginal and Average Costs. Calculate the Total Revenue. Draw the Average, and Marginal cost functions. Draw the Marginal Revenue Curve. Where do they meet and at what level of output? At what level is profit maximized? What are total revenue, total cost and the total amount of profit at that level?
Suppose that each firm in a competitive industry has the following costs: Total cost: TC = 50 + 1/2q2 Marginal cost: MC = q Where q is an individual firm’s quantity produced. The market demand curve for the product is: Demand: QD = 120 – P Where P is the price and Q is the total quantity of the good. Currently there are 9 firms in the market. What is each firm’s fixed cost? What is its variable cost? Give the equation for average total cost. Graph the average-total-cost curve and the marginal-cost curve for q from 5 to 15. At what quantity is the average-total-cost curve at its minimum? What is the marginal cost and average total cost at that quantity? Give the equation for each firm’s supply curve. Give the equation for the market supply curve for the short run in which the number of firms is fixed. What is the equilibrium price and quantity for the market in the short run? In this equilibrium, how much does each firm produce? Calculate the firm’s profit and loss. Do firms have…
Pindyck & Rubinfeld, 8e. Ch 8 #10. Suppose that you are given the following information about a particular industry: Q D = 6500 − 100P Q S = 1200P C(q) = 722 + q 2 200 MC(q) = 2q 200 Assume that all rms are identical and that the market is characterized by perfect competition. (c) What is the lowest price at which each rm would sell its output in the long run? Is prot positive, negative, or zero at this price? Explain. (d) What is the lowest price at which each rm would sell its output in the short run? Is prot positive, negative, or zero at this price? Explain.
Start from a market with perfect competition. For a representative producer, the long-term marginal cost is given by LMC=9Q2−20Q+50LMC=9Q2−20Q+50 and the long-term total cost function is LTC=3Q3−10Q2+50QLTC=3Q3−10Q2+50Q Assume that the price on the market right now is SEK 50. a) How much profit or loss does the producer make in the initial situation? b) Describe in detail what will happen in the market and why c) What will the equilibrium price be? d) how much will our producer produce at market equilibrium?