Refer to the information provided in Table 19.8 below to answer the question(s) that follow.Table 19.8Total IncomeTotal Taxes$20,000 $2,000 40,000  4,800 60,000  9,000 80,000  16,000Related to the Economics in Practice on page 393: Refer to Table 19.8. If income increases from $20,000 to $40,000, the marginal tax rate is

Which contracting party gains from the use of a more sophisticated contract?

a. The principal, who offers the contract. b. The agent, who accepts the contract. c. Both parties may lose. d. Both parties gain equally.

Economists disagree about many things. When those disagreements are about which model best explains the economy, these disagreements are primarily over "positive" statements

a. True b. False