When it was enacted, the Alabama law was supposed to be a model for what advocates of “enforcement-only” immigration policies call “self-deportation.” The idea is to make everyday life so difficult for the undocumented that they choose to leave of their own accord.
What Sarlin found was a disaster – a policy whose unintended consequences were far-reaching and extremely costly to the native-born as well as the immigrant population.
Moar here.