Consider the Roy$/$Borjas model of immigrant selection. The destination country is interested in increasing the number of immigrants that it receives. To do so$,$ it decides to introduce a migration $$subsidy$,$ such that migration costs would decrease from $15$ to $10.$ Such policy would affect the number and selection of immigrants in the same way as if: a$.$ Wages in the destination for those with no education $($that$,$ is for those with s$=0)$ decreased by $5$ b$.$ Wages in the destination for those with no education $($that$,$ is for those with s$=0)$ increased by $5$