Consider the Roy model of potential immigrant flows as discussed in the chapter.
(a) Why is it that a source country can experience both an outflow of low-skill workers and an outflow of high-skill workers at the same time?
(b) Provide a graph of the returns to skills in the destination and source countries that would suggest both behaviors occur simultaneously.
(c) How do the social and economic (i.e., tax) policies of the United States encourage both types of flows?