In the last two decades, the United States has been subject to very large increases in the immigration of undocumented workers from Mexico, most of them low-skilled, and the government has considered ways to reduce the flow. One policy is to impose larger financial penalties on employers who are discovered to have hired undocumented immigrants. a) What effect would this policy have on the employment of low-skilled undocumented immigrants? b) What effect would it have on the demand for high-skilled “native” labor?