21. Explain the role played by consumers, business, and government in a market economy. Hint: Focus on the factor and product markets. 22. Compare and contrast centrally planned economies and free market economies. 23. Using examples of land, labor, and capital, explain why economists believe that all goods and services are scarce. 24. What are the trade-offs between free enterprise and government intervention associated with the United States' antitrust policies? Give one example of a U.S. government action to regulate or break-up a monopoly