The Washington Post cites CGD research fellow Michael Clemens's working paper comparing the wages of workers inside the United States to the wages of workers outside the United States.
From the article:
"A recent report by the Center for Global Development found that even by the most conservative estimates, a 35-year-old Mexican male with nine years of education would make 132 percent more working in the United States than in his home country. For a Bolivian, the increase would be closer to 270 percent; and for a Haitian, more than 740 percent."
Read the article