In the second section of the article, Freeman deftly poses three key questions that are central to the immigration debate: Why do immigrants come? How do immigrants do? And most importantly, how do immigrants affect the native workers in the countries in which they arrive? Economically speaking, four important reasons exist for immigrants to leave their home country for another (host) country. Economic size and average incomes (specifically, per capita income) are two important determinants. In 2000, the United States was the largest recipient of immigrants. One reason is that it is an economically large country; a larger country has more jobs available and becomes attractive to a potential migrant. The other reason is that the United States has one of the highest per capita incomes in the world. Freeman notes that (after accounting for any differences in schooling) immigrants in the United States “earn five to eight times as much as those in the low-wage countries from which the immigrants come” (p. 155). However, if a country is remote, there will be fewer immigrants; distance matters. The United States’ largest source of immigrants is Mexico; while U.S.-Mexico per capita incomes differ considerably, Mexico is very close to the United States. Fourth, immigration policies matter. In 1910, 8.8 million immigrants in a U.S. population of 92 million were proportionally much larger than the 9.1 million immigrants in 2000 in a U.S. population of 280 million; immigration laws were much less stringent in 1910 than in 2000.