National Bureau of Economic Research paper on the effects immigration has on wages in the United States
Study contends previous analyses on the relationship between immigration and wages falsely assumed perfect labor substitutability between immigrants and native workers of similar education levels, distorting results.
Research shows average American wage RISES due to immigration, both short-term and long-term.
Only native demographic whose wages drop are High School dropouts who suffer a decrease in wages of approximately ~2% short-term, alleviating to ~1.1% over time.
Study finds new immigration does severely impact wages of prior immigrants, suggesting lack of substitutability with *natives.
Overall, vast majority of American workers’ wages increase from immigration, High School dropouts (<10% of population) experience a slight decrease which alleviates with time (and there is evidence that immigration may increase native High School graduation rates, too).
Here is the relevant source: