Alex Nowrasteh’s interesting comments leave me with three questions.

1. How much higher would cumulative Mexican immigration since 1986 have been if the IRCA’s employer sanctions hadn’t been imposed?

2. How much higher would cumulative Mexican immigration since 1986 have been if the IRCA’s border security boost hadn’t been imposed?  (Your comments seem to suggest that it actually would have been lower, since guest workers wouldn’t have bothered to bring their families).

3. How much higher would cumulative Mexican immigration since 1986 have been if the IRCA’s hadn’t been passed at all?

P.S. Do your answers account for diaspora dynamics?

What do you think, Alex?