10) In the United States, which factor of production earns the largest share of the nation’s total income? 11) In the United States, how does the income received by the richest 20 percent of individuals compare with the income received by the other 80 percent? 2.7Â Â Essay: The Global Economy 1) Compare and contrast the world population with that of the United States. Is the United States becoming a larger or a smaller part of the world’s population? 2) How many and what fraction of the world’s people live in advanced economies? In emerging market and developing economies?