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If you read this study it says they found a big negative effect on male workers:

https://giovanniperi.ucdavis.edu/uploads/5/6/8/2/56826033/ma...

> Using a restricted subsample of high school dropouts and the March-CPS4, he finds a large and long lasting negative di↵erence in wages between Miami and its control in the 1982-1985 period.

The article argues that is flawed since it only considered high school dropout men, but those are the main competitors to low skill immigrant jobs. If you include women and other groups who don't compete for the same low skill jobs then yeah you wont find an effect. Some of those might even see increased wages canceling out the reduced wages low skill men see, but that doesn't really help those low skill men.

It makes sense to say that at least a slice of population gets the small stick, but if I get it right the net benefits as a whole are bigger than the singular disadvantages, or no?

I can't seem to understand that

The problem can be that the net whole is “better off” by some minuscule amount but certain subgroups are disastrously worse off.

For example, factory jobs disappearing usually increases the nations GDP “as a whole” but has disastrous effects on the poor communities that provided the labor.

Or another way to put it - if immigration is a net benefit and has little downsides, then a minimum wage for immigrants (legal or otherwise) of $45/hr should be fine.

(Even that might not move the needle much as immigrant labor, both legal and illegal, has “corporate” advantages that can’t be matched by residents. Being able to skirt regulations and laws because you know your employees can’t complain without risking their residency is a powerful tool. See: H1B abuse and OSHA abuse.)

Studies didn't find benefits either, it was mostly non results. More people means more people, they work and consume services at about the same rate, what matters is just how the new people distort the ratio of different kinds of people not that they are more people.

More people means there is more competition for housing until more supply is built though, so housing prices tend to go up from immigration. That is good if you wanna sell, bad if you wanna buy or rent.