Which one is the right answer?

13. When firms in an illegal market form a cartel, a. they are able to supply higher quality products. b. it is more difficult for police to detect their activities. c. they are able to increase profits by behaving as a monopolist. d. they actually become economically efficient by setting price equal to marginal cost. e. they rely on goodwill to keep the cartel stable. 14, Perfect competition, monopoly, monopolistic competition, and oligopoly are all examples of a. ceteris paribus assumptions. b. real-world situations that firms face. c. market structure models. d. markets with positive economic profits. 2. voodoo economics. 15. Which of the following products would most likely not be produced in a perfectly competitive market structure? a. Wheat. b. Airplanes. c. Potatoes. . Apples. e. All of these would be produced in a perfectly competitive market structure. 16. Firms operating in a perfectly competitive market are price takers because a. they have a lot of market power. b. in the market there are many firms, it's easy to enter, and the firms produce identical product. they choose to set a price that differs from the market price but do not lose profit. d. they choose to set a price that differs from the market price in order to gain market share. e. in a perfectly competitive market, price is dictated through various government agencies. 17. Mike is about to start up a business in a monopolistically competitive market. He can expect to find entry into the market to be the product he sells to be the number of competitors to be , and a. easy; very large; nondifferentiated b. difficult; very large; differentiated C. easy; relatively few; nondifferentiated d. impossible; relatively few; differentiated easy; large; differentiated