Problem: Use graphical analysis to show the gains and losses resulting from the migration of population from a low-income country to a high-income country. Explain how your conclusions are affected by (a) unemployment, (21) remittances to the home country, (c) backflows of migrants to their home country, and (d) the personal characteristics of the migrants. If the migrants are highly skilled workers, is there any justification for the sending country to levy a "brain drain" tax on emigrants?