Suppose the immigrant flow from Lowland to Highland is positively selected. In order to mitigate the "brain drain" Lowland experiences as a result of this migration, public officials of Lowland successfully convince all Lowlanders who migrate to Highland to remit 10 percent of their wages to family members.
(a) What effect will this policy have on the immigrant flow?
(b) Provide a graph that details the extent to which this policy will limit the brain drain.