Which of the following is a reason why firms may be more efficient than markets as coordinators of economic activity?

Which of the following products should be sold face-to-face rather than by mass advertising?

a. Breakfast cereals b. Health drinks c. A pharmaceutical which can only be understood by doctors d. A new brand of herbal cosmetics

Which of the following has tended to increase the competitiveness of markets in the United States during the last couple of decades?

a. increases in transport costs b. development of the Internet c. decreased competition from imports d. more government regulation of product quality