A. suggest that some existing firms will exit the market. B. suggest that new firms will enter the market. C. are sustained through government-imposed barriers to entry. D. are never possible.
A. perfect competition B. monopolistic competition C. oligopoly D. monopoly
A. jeans B. books C. tap water D. clocks
A. faces a demand curve that is horizontal. B. faces a demand curve that is vertical. C. has no control over product price. D. has some control over product price.
A. a brand name B. a tie-in C. the quantity available for sale D. the amount of deadweight loss
A. 对 B. 错
微信支付 
支付宝支付