That paper is interesting but it was published in 1991, and it predates the modern use of exogenous shocks to get clear evidence on causality. In particular, i

That paper is interesting but it was published in 1991, and it predates the modern use of exogenous shocks to get clear evidence on causality. In particular, it doesn't directly estimate effects on wages - it calculates them from an economic model. Whereas this paper looks directly for wage effects, in the context of a big local labour supply shock, and doesn't find them: Card, D., 1990. The impact of the Mariel boatlift on the Miami labor market. ILR Review, 43(2), pp.245-257. Borjas is an interesting guy and I respect him, but I don't think the overall literature supports his negative view of migration's effects on wages. I stand by my claim, not because I'm a huge expert, but backed up by the two literature reviews mentioned above.