Tamar Jacoby : Immigration comes in air , but focus tends to be on the undocumented . She says for real reform , discussion must be on providing unskilled worker visas . She says there 's no way to ` ` ' in ' '' There simply is no avenue for an uneducated Mexican unless he has family members living legally in the U.S. who can sponsor him for a family visa . if no visas are available . Jacoby : In dynamic economy , entry will always outpace exit .
Tamar Jacoby : Immigration comes in air , but focus tends to be on the undocumented . She says for real reform , discussion must be on providing unskilled worker visas . She says there 's no way to ` ` ' in ' '' if no visas are available . Jacoby : In dynamic economy , entry will always outpace exit .