# ECON101 2014-15 Fall Final Exam Answers.pdf

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Eastern Mediterranean University Faculty of Business and Economics Department of Economics 2014‐15 Fall Semester    ECON101 ‐ Introduction to Economics I Final Exam   Type A Answers 26 January 2015 Duration: 100 minutes Name Surname: _________________________ Group No: ___________ Student ID: _____________________________ Part A: Multiple Choice Questions (2 pts. each, total 40 pts.) 1. Profits are maximized at the output at which marginal cost equals marginal revenue. If the market price falls below the minimum average variable cost: A. the firm should shut down. B. the firm should produce more. C. the firm should produce less. D. None of the above. 2. A monopolist sells 4 units of output for £6 each and 5 units of output at £5 each. The marginal revenue associated with the 5th unit is: A. 1 B. 3 C. 25 D. 15 3. For a perfectly competitive firm operating in the short run, in order to maximize profits it should produce output where:  A. marginal cost equals average total cost. B. marginal cost equals average variable cost. C. marginal cost equals price. D. total cost equals total revenue. 4. Which of the following statement about a long-run cost curve is true?  A. The minimum is always below the minimum point reached by a short-run cost curve. B. There are always decreasing returns to scale. C. It shows the minimum average cost to produce a given output when all inputs can be varied. D. All the above. Page 1 of 8   5. Referring to the figure above, the following statements are correct except: A. To the left of point E marginal cost exceeds marginal revenue. B. At point E marginal cost equals marginal revenue. C. To the right of point E marginal revenue is less than marginal cost. D. Output is the most profitable output. Q 1  6. In which of the following market structures do firms have no control over the price of their product?  A. Pure monopoly B. Perfect competition C. Monopolistic competition D. Oligopoly 7. In perfect competition, the marginal revenue of an individual firm  A. is zero. B. is positive but less than the price of the product. C. equals the price of the product. D. exceeds the price of the product. 8. If marginal revenue is higher than marginal cost then: A. producing one extra unit will increase total profit. B. total revenues are larger than total costs. C. the firm is maximizing its profits. D. All the above. 9. Collusion means that:  A. a monopolistic firm uses illegal means to maximize its profits. B. a large number of monopolistically competitive firms decide to keep the price high to maximize collective profits. C. two monopolistically competitive firms agree to keep their price lower than their competitors. D. two or more oligopolistic firms act as if they were a monopoly. 10. The marginal cost curve will shift up if:  A. a new technological improvement is introduced. B. the cost of one variable input in the production increases. C. demand increases. D. production increases. Page 2 of 8   11. The table above shows that:  A. total cost increases as output increases. B. marginal cost falls over some range of output and then increases. C. average cost declines and then increases. D. All the above. 12. A firm's break-even point is the quantity and price at which the firm's total revenue just equals its  A. total cost. B. total variable cost. C. total fixed cost. D. marginal cost. 13. As output increases, marginal cost will eventually  A. increase because of the law of increasing returns. B. increase because of the law of diminishing returns. C. decrease because of the law of diminishing returns. D. decrease because of the law of increasing returns. 14. In a perfectly competitive market, ________.  A. there are restrictions on entry into the industry B. firms in the industry have advantages over firms that plan to enter the industry C. one firm can decide to change the market price D. there are many firms that sell identical products 15. Which of the following is always true for a perfectly competitive firm? A. P = MR B. P = ATC C. MR = ATC D. P = AVC 16. Which of the following is true for a single-price monopolist? A. P > MR B. P < MR C. P = MR D. P = elasticity of demand Page 3 of 8   17. Economic efficiency necessarily occurs when the firm…………………………… A. produces a given output at least cost. B. produces a given output by using the least inputs. C. earns a normal profit. D. earns an economic profit. 18. Which of the following is characteristic of the long run?  A. It must be equal to 12 months in length. B. The firm’s plant is fixed. C. All resources can be varied. D. All of the above answers are correct. 19. Suppose that the five firms that make up the invisible goldfish industry formally sign a contract to establish product price; essentially they have:  A. established a dominant firm to serve as the industry's price leader. B. established a monopolistically competitive industry. C. formed a cartel. D. entered into an implicit agreement. 20. In the figure above, the short-run supply curve is:  A. the SMC curve. B. the points between AD. C. the SMC curve above A. D. the points between AC. Page 4 of 8

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